If a gecko’s feet used a secretion to stick to surfaces, they wouldn’t be able to move. And geckos can stick to surfaces, even if there is no air, meaning they don’t use sucking discs. Some scientists suggested an electrostatic charge might help geckos resist gravity, but they’re too heavy for such a charge. Research has shown that  geckos can still cling to surfaces, even if the air is charged with electron ions. If geckos were resisting gravity thanks to electrostatic charges, then the air filled with ions would prevent such resistance.

It turns out geckos are able to adhere to surfaces thanks to the numerous microscopic hairs, or setae, on the bottoms of their feet – as many as 2 million hairs on just one foot. Each of these 2 million hairs further branches out to 1000 more miniscule hairs, totaling 2 billion hairs per foot. The thickness of each hair is one five thousandth of a millimeter. To make a comparison, there are around one hundred thousand strands of hair on a human head. If we had the same number of hairs found on the foot of a gecko, then our hair would cover a surface as large as a football field.

The hair on a gecko’s feet are directed towards its heels. As a gecko steps forward, it presses on the ground and pulls back a little, enabling a maximum level of contact and generating a weak attractive force at the molecular level, called van der Waal’s force, which connects the foot and the ground.

Van der Waal’s force is the bonds between molecules that arise from the forces between positively and negatively charged sectors. An atom has a positively charged nucleus surrounded by a cloud of negatively charged electrons. If the positive charge of the nucleus is equal to the negative charge of electrons, the atom does not carry a charge. Electrons move randomly around the nucleus, sometimes swarming on one side of the atom for a short period of time. When this happens, one side of the atom will have a negative charge, while the other side is positive. Such polarized atoms will momentarily enter into electrostatic interactions with other atoms. This results in an attractive force, which usually lasts for a short period of time. Even though this interaction comes into existence momentarily and then disappears, it is sufficient to hold atoms together in an environment where there are many atoms.

Van der Waal forces do not only appear inside matter and among atoms; they exist even between larger objects, like our hand and the wall it touches. Yet these forces are very weak. At the atomic level, our hand looks like a range of mountains, and only the atoms on top of the summits are in contact with the wall. What makes the gecko unique is that contact occurs between the wall and each one of the millions of hairs on the gecko’s feet. When the gecko lifts its foot, the attractive force is broken. It’s that simple – no suction cups necessary!

In physics, there are certain physical quantities that play a central role in the science, such as the mass of an electron or the speed of light, also known as the gravitational constant.

“We do know the values of these fundamental quantities very well,” said astrophysicist Prof. Brian Koberlein in an article published recently on his website. “The mass and charge of an electron are known to about one part in a billion. The gravitational constant, perhaps the least well measured, is known to about one part in ten thousand,” he added. Prof. Max Tegmark, who is a world famous physicist from the Massachusetts Institute of Technology, said that most of the parameters affecting low-energy physics appear fine-tuned at some level in the sense that changing them by modest amounts would result in a qualitatively different universe.

“If the electromagnetic force were weakened by a mere 4%, then the Sun would immediately explode. If it were stronger, there would be fewer stable atoms,” noted Tegmark in the book Science and Ultimate Reality: From Quantum to Cosmos, published by Cambridge University Press. Tegmark continued, “If the weak interaction (which is one of the fundamental forces in physics) were substantially weaker, there would be no hydrogen around, since it would have been converted to helium shortly after the Big Bang. If it were either much stronger or much weaker, the neutrinos from a supernova explosion would fail to blow away the outer parts of the star, and it is doubtful whether life supporting heavy elements would ever be able to leave the stars where they were produced. (The heavier elements, such as carbon, oxygen, and iron, were made in the nuclear furnace of high mass stars. Upon the death of stars, these elements, along with even more massive nuclei created during the supernova, were thrown out into space.)

Prof. Tegmark gave some more fascinating examples: “If the protons were 0.2% heavier, they would decay into neutrons unable to hold onto electrons, so there would be no stable atoms around. If the proton-to-electron mass ratio were much smaller, there could be no stable stars, and if it were much larger, there could be no ordered structures like crystals and DNA molecules.”

And here are some examples of “fine tuning” mentioned by Dr. Luke Barnes from the Sydney Institute for Astronomy, in his article, “The Fine-Tuning of the Universe for Intelligent Life”:

“If gravity were repulsive rather than attractive, then matter wouldn’t clump into complex structures. If the strong force (the force that binds protons and neutrons together to form the nucleus of an atom) were a long rather than short-range force, then there would be no atoms. Any structures that formed would be uniform, spherical, undifferentiated lumps of arbitrary size and incapable of complexity. If in electromagnetism, like charges attracted and opposites repelled, then there would be no atoms. As above, we would just have undifferentiated lumps of matter.”

Another example of fine tuning is the fine structure constant, which is also known as alpha. It’s the measure of the strength of the electromagnetic force that governs how electrically charged particles interact. Its value is nearly equal to 1/137 (or to 0.007297). Richard Feynman, who is one of the top physicists of the 20th century and a Nobel laureate, called the fine structure constant “a magic number.”

“If alpha were >0.1, stellar fusion would be impossible,” stated University of Cambridge theoretical physicist Prof. John Barrow.

Physicist Gerald Schroeder from the Massachusetts Institute of Technology quoted the words of Prof. Michael Turner, an astrophysicist at the University of Chicago and Fermilab: “The precision (in the universe) is as if one could throw a dart across the entire universe and hit a bull’s-eye one millimeter in diameter on the other side.”

Can an apple move the earth? Physics says it can. The power that gave an apple the ability to move the world, also gave us humans the capacity to make use of the natural laws and be a true vicegerent on the earth.

In a universal arrangement of objects, from the smallest to the largest, in terms of length, time, and mass, where is the human located? In between the diameter of an atomic nucleus (10-14 meters) and the distance of the farthest galaxy from the earth (1026 meters), the human being occupies a zone between one and three meters. The human lifetime can be measured to be around 109 seconds in temporal length, to the duration of a ray of light passing through a proton (10-24 seconds), to the age of the universe (1017 seconds). And the human mass is located around a 102 kg zone, on a scale from the mass of an electron (10-31 kg), to the mass of the Milky Way galaxy (1041 kg).

Based on this data, understanding the human that is trapped in this enormous universe is crucial. Humans are just a speck, jammed between mote and sphere, living in a frail state of weakness and poverty. “Do not strut about the earth in haughty self-conceit; for you can never split the earth (no matter how hard you stamp your foot), nor can you stretch to the mountains in height (no matter how strenuously you seek to impress)” (Qur’an 17:37).

Humans, who need a vast amount of grace and support, are in search of answers to improve themselves. “Who am I?” they often ask; “where am I?” As scientists and researchers discover the excellence of the universe’s artistry, we begin to comprehend just how blessed humans are. Within the laws of science lie the answers to our questions. Laws are relative principles that operate according to the constants wisely built into the universe. These laws are veils to the majesty of creation. Each law is created anew every moment, thus we perceive them as if they are eternal patterns. For example, the human body gravitates to the center of the earth with a force equivalent to their mass multiplied by the average gravitational velocity of the earth, which is 9.8 m/s2. The law of gravity is created every moment in such fine measures that it is possible for us to walk on the ground.

It helps to remember Newton’s three laws in physics. The first is the principle of inertia, which states that unless there is an external force, or if the sum of all forces cancel each other out in direction and size, then an object is either at rest or moves at a constant velocity. The second law is that force equals the mass of an object multiplied with its acceleration. And the third is the action-reaction principle, which states that when a force is applied to an object, the object exerts a force in opposite direction, equal in magnitude. This means that when an apple is thrown into the air, and the apple accelerates in opposition to gravity, the earth is distanced from the apple with the same amount of force. Similarly, when the apple falls down because of gravity, the apple is also pulling the earth with the same magnitude. If this was to repeat constantly, theoretically a movement like the one made by a yo-yo should have happened between the apple and the earth. Because of its huge mass, the earth’s acceleration is very small, thus this yo-yo movement would not be felt. An object as small as an apple actually moves an object the size of the planet. This means that the power that gave an apple the ability to move the world, also gave us humans the capacity to make use of the natural laws and be a true vicegerent on the earth.

Nothing in the universe has been created in vain – all phenomena occur because of a purpose they are assigned to fulfill. In a universe in which everything is bound by a complicated web of laws that are created without a moment’s lapse, humankind surely has a significant role to play in the unique position with which they are graced. This position undoubtedly requires a sense of humility in the face of all the grandeur around us, yet also being aware of our given capacities, which enable us to master over all existence.

Science is the systematic study of the behavior of certain phenomena (that is, regularities, uniformities) in the physical universe. Scientific study is based on observation, experimentation, measurement, and the formulation of universal laws that describe these facts and phenomena in general terms and enable prediction.

The process of describing regularities (i.e. things that happen in a particular way) is incomplete and never exhaustive because regularities are not exact and deterministic. There is actually quite a lot of approximation and simplification involved in this process. If an exact equation is desired, then these scientific laws, which are useful for prediction, must be formulated in mathematical terms; this represents the whole business of science.

The huge popularity of science is due to its practical results, such as the previous technological examples stated previously. Science is about studying regularities in the material world and describing those regularities in order to make predictions and to make possible the technology that we use daily possible.

It is important to stress that describing and making use of science is not about explaining, but rather using it to make sense of something; here, description is not to be confused with explanation. Therefore, science is about describing, not explaining. The moment a scientist talks about the meaning behind a law or regularity in nature and our ability to benefit from it, he is no longer talking science and he is venturing into the realm of metaphysics and the philosophy of science. Just because someone is a great scientist, it does not mean that he has a deeper insight into the meaning of the laws of the physical world and universe.

What science seeks to explain

Science does not answer questions of meaning or questions of agency (like, who is doing what for what reason? What is responsible for a given regularity?) and we cannot criticize science for not dealing with these questions. They may be important questions but it’s not the responsibility of the field of science to answer these questions. For example, consider the Law of Gravity. We drop a pen and it falls. Why did it fall? Because of gravity.

We observe that, without exception, the pen always falls when we lift it and drop it. Then we call the conjunction between performing an action and its regularity the law of gravity. This means that the law of gravity is simply the name we have given to this regularity; however, it does not mean that the pen is falling because of gravity. Gravity is the name given to the process, not an explanation for it, but in our minds both the name and the explanation for the phenomenon have become one and the same.

The question arises: Is it logically justified to explain an experience through a causal law that is derived through the same experience?

In the beginning, when scientists started asking these questions, it was unclear what the difference was between description and explanation. For a long time science was thought to be a venture competing with religion in providing answers for life.

Regarding natural laws, 19th century American philosopher Charles Peirce stresses on the point that natural laws serve as a description of natural events, not as explanations of these very events: “no law of nature makes a stone fall, or a Leyden jar to discharge, or a steam engine to work.”¹

A law of nature left to its self would be quite analogous to a court without a sheriff. A court in that predicament might probably be able to induce some citizen to act as sheriff; but until it had so provided itself with an officer who, unlike itself, could not discourse authoritatively but who could put forth the strong arm, its law might be the perfection of human reason but would remain mere fireworks. Just so, let a law of nature – say the law of gravitation – remain a mere uniformity – a mere formula establishing a relation between terms – and what in the world would induce a stone, which is not a term nor a concept but just a plain thing, to act in conformity to that uniformity?²

The law of gravity is just a formula, just a name. It cannot make a stone act in accordance to it.

It is important to note that the notion of law is closely related to issues of agency and also to the affinity of the human mind to perceive natural phenomena and the possibility of finding patterns in nature beyond science (i.e. how is it that we are so in tune to what is happening in the world that we can pick up all these regularities?). These issues announce the “greatness” of science. When it comes to the affinity of the human mind to realize recurrent patterns in the universe, Peirce says:

. . . the mind of man is strongly adapted to the comprehension of the world; at least, so far as this goes, that certain conceptions, highly important for such a comprehension, naturally arise in the mind; and, without such a tendency, the mind could never have had any development at all.³

Therefore, there would be no science if one could not grasp the regularities.

In our scientific inquiry, it is reasonable for us to be searching out these regularities and hoping that they will remain stable, but we cannot assume that we have explained how or why such regularities or laws are in effect. It may also be reasonable to say that there are regularities and we hope that these regularities and so-called universal laws will come into effect in the future so that technology can be made from predictions. There can only be hope, and not certainty, because science is based on observation and there may be some instances where the same observation may not occur.Even though science is based on exactitude, there is still a measure of hope and faith involved.

A scientific law states a repeated observation about nature. How do we come to the conclusion that we have a scientific law? Several events occur, (not just to the researcher) that hold to certain regularities, according to a certain pattern, and a generalized statement is formed. The process of generalization from a limited number of observations to form a universal statement or law is called the process of induction, or looking at a certain number of events and saying that things are going to happen all the time. The assumption under the process of induction is that the more observations made about a particular phenomenon, the more it will reinforce the law.

There is only one way for such an assumption to be true, and it has nothing to do with the number of observations. We assume a relationship or connection between the object and what occurs, the cause and effect. The assumption is that there is a necessary connection between the cause and the effect. One must be able to explain this connection in a logical way, not as something that depends solely on observation but something that necessitates the event. If this is unable to be done, if it is only based on observations, then induction is a problem. In formulating a scientific law, generalizations made through the method of induction are problematic.

Because of induction, the basic application of our inductive reasoning is twofold: firstly we think we can describe what we have seen by the use of universal laws, and secondly, that we can use these established laws in predicting what we will see. There is, however, a problem with the mechanics of the inductive process. Are we justified in formulating these universal laws simply on the basis of a discrete number of past observations that have been made?

For example, based on the scientific observation of planetary motion, we could suggest that “the sun will rise every day.” However, just because the sun has risen in the past, it does not mean that it will continue to do so either tomorrow or the next day. So the induction based on the number of occurrences of a particular phenomenon is illogical. There is no guarantee that we will ever see the sun rise again. The sense of faith we have in the scientific laws of planetary motions is based on the supposition that some kind of necessity has caused the sun to rise in the past and will therefore continue to cause the sun to rise in the future. We assume that the connection between the cause and the effect are necessarily related. To use another common example, everyone in Europe thought the statement “All swans are white” was true because every swan that they had ever seen was white. However, when travelers came back from Australia and New Zealand, they reported having seen black swans, thus providing a real life example of how induction can falter. This observation negated the previous generalizations.This brings us to the issue of causality.

Causality is the relationship between an event (the cause) and a second event (the effect), where the second event is understood as a consequence of the first. In relation to one another, induction only has to work sometimes whereas causality always has to work. It has little to do with the number of occurrences; it has to work for each cause-effect relationship. The consequence of this model of the world is that empirical knowledge is connected to the causal relations between objects and events. According to this view, the logic of scientific discovery is inductive. In other words, it infers universal laws from particular statements.

The logic of induction proceeds as follows: First, it conjectures that induction is valid, and then concludes that causation is true. Whereas, from the point of view of logic, it is just the other way around; induction can be justified only by proving that causation is logically valid i.e., that the relation between cause and effect is necessary. Induction is therefore logically not a justified method to attain universality. As the Australian-British philosopher of science Sir Karl Popper observes, scientific induction is “logically inadmissible,” that scientific “theories are, therefore, never empirically verifiable.”⁴

Can we count on the laws of nature? It depends. We can have faith in them; we can hope that they will continue to hold in the future but there exists no logical certainty. But we cannot prove that they will remain true because we cannot observe something that will occur in the future (the dogma of the experiment).

The British philosopher Bertrand Russell calls the dogma of induction, the “biggest scandal of philosophy.” He provides the example of a farmer and his chicken. The chicken notices that the farmer comes every day to feed it. It predicts that the farmer would continue to bring food every day. According to the principle of induction, each feeding event added justification to its prediction. Then one day the farmer came and wrung the chicken’s neck. Russell’s point is that induction cannot justify any conclusions!

Critical problems with the method of induction have been in discussion long before the more recent debates, and are often connected with the concept of causality. The same issue was also at the center of a heated debate among Muslim philosophers and theologians as early as the 12th century. This critical problem with the method of induction was also pointed out earlier by the 18th century Scottish philosopher David Hume. Hume stated that when we observe two events to be causally related, say a seed (a) resulting in the growth of a shoot or tree (b), what we in fact observe is only a contingent conjunction of two events. That is, the causation that we think we perceive is not actually “out there in the world” for us to observe. When we see two events and judge them to be causally related, it is merely through a habit of the mind, something we project onto the world. A necessary causal link, as such, is not guaranteed. Hume writes:

Were any object presented to us, and were we required to pronounce concerning the effect, which will result from it, without consulting past observation; after what manner, I beseech you, must the mind proceed in this operation? It must invent or imagine some event, which it ascribes to the object as its effect; and it is plain that this invention must be entirely arbitrary. The mind can never possibly find the effect in the supposed cause, by the most accurate scrutiny and examination. For the effect is totally different from the cause, and consequently can never be discovered in it.⁵

This means that causal laws of nature are not true logically and there is no concrete evidence that these will continue to hold in the future. We simply cannot postulate universal laws that tell us the way the world irrefutably is and will always be unless we have some good reason to trust such generalizations. And even if we could trust such universal laws as “the sun will always rise,” it is not clear how many times we would need to see the sun rise in order to justify proposing this law. Scientific observation, although detailed and informative, has no claim to being the irrefutable truth of the matter.

The solution

Sir Karl Popper offered a potential solution to this problem by thinking about the way we do science in a new light. Popper turned science on its head by claiming that we are looking at science in the wrong way. Instead of looking to science to provide us with theories that are definitive and true, Popper said that we should be looking to science to provide us with theories that we have failed to prove false for a very long time. This approach to science is referred to as “Falsificationism.” Less of a solution and more of a shortcut, it is a tool which we are allowed to use in the game of science. He describes the Falsification approach by noting that for the scientific method to be rational, it must make claims to knowledge that is logically sound. That is, science is not about making grand universal laws, but about the examination of individual observations. According to the model of falsification, science is concerned with evaluating and refining. What we commonly think of as scientific claims to knowledge, are only hypotheses that we accept till they are proved wrong.

Fundamentally, Popper accepts that science can never provide us with complete 100% certainty, but he claims that this is not really a problem because it is not actually science’s job. The purpose of science is to provide us with a theory that is likely to be true based on the fact that we haven’t yet managed to prove it wrong. One unfortunate consequence of this, however, is that you can only ever be certain of the things that you have proved wrong. We know, for example, that the world definitely is not flat. The problem with this fact is that, although certain, it is not particularly useful to know that something is definitely false. For Popper, the best we can hope for is that a given claim is corroborated at one instance in time and if we presume otherwise, we are begging the question of the uniformity of nature: that what has always been, will (for apparently no good reason) continue to be.

To recapitulate, science does not deal with explanation; this is the realm of metaphysics. How we explain things depends on our beliefs and world view.

Dr. Yamina Mermer is a member of the Scriptural Reasoning Group based at the Faculty of Divinity, University of Cambridge, UK.
Dr. Eren Tatari is Assistant Professor of Political Science, Rollins College, Florida.

Footnotes

1. Online Past Masters text, The Collected Papers of Charles Sanders Peirce, (University of Virginia E-text Center), 1.323. (The online texts is drawn from The Collected Papers of Charles Sanders Peirce, Vols. I-VI ed. Charles Hartshorne and Paul Weiss (Cambridge, MA: Harvard University Press, 1931-1935), Vols. VII-VIII ed. Arthur W. Burks (same publisher, 1958).
2. Ibid., 5.48.
3. Ibid., 6. 417.
4. Popper, Karl. (1959). The Logic of Scientific Discovery. Hutchinson & Co. (Original work published in 1935).
5. Hume, David. (1772). An Enquiry Concerning Human Understanding. Hackett Publishing Co.

The world may not have ended on December 21, 2012, but that does not mean it won’t end at all. So what will be the force that will disperse this robust system of ours, rendering all forces including gravity obsolete, and forcing the sun and planets out of their orbits?

The universe contains billions of heavenly systems that travel interdependently in a perfect and harmonious fashion. What could be the obvious cause or force that could disrupt this great arrangement, deorbit the stars and planets, and make every other force ineffective including gravity? If we ponder upon the verses of the Holy Qur’an, “When the sun is folded up (and darkened). And when the stars fall (losing their luster)” (At-Takwir, 81:1−2), “And when the heaven is torn away (with all the truths becoming manifest)” (At-Takwir, 81:11) with our current cosmological advances, will Black holes be the cause that will likely destroy the Sun and even devour the light of stars so that they are unable to function?

Black holes are considered to have the potential to cause a universal apocalypse. It seems plausible that with such gravitational power of Black holes, mountains would be casted away, and magma displacement via volcanic eruptions could lead to major earthquakes. There are a couple of recent geologic studies pointing out the possibility that the gravity of the sun and moon play a role in development of earthquakes. The 7-8 meter rise in seas and 35-40 cm rise in land caused by lunar and solar eclipses are considered to be a possible factor among many factors that triggers an earthquake. Earthquakes of 12-15 Richter scale magnitude can occur because of the gravitational force of Black holes. The biggest earthquake ever recorded was of 9.2 magnitude; such that if it happens again, it can lead to a major catastrophe in a very short time.

Let’s not forget that we are residing on a globe filled with fire in its center. Gases that make up the atmosphere are held only with help of planetary gravity. One of the forces that will boil all the waters away and let all the gases escape the planet could be Black hole gravitation. The air in our atmosphere and resulting “air pressure” can be destroyed by Black hole gravity. Oceans would start boiling violently and then might evaporate off the planet. In this case, living things would suffer severe structural damages since all life forms are composed mostly of water (~70%). That is why astronauts wear a special space suit filled with air made up of normal atmospheric pressure when they leave the atmosphere. We should also keep in mind that trillions of heavenly bodies (asteroids, meteors, and comets) located in the two asteroid belts (Orion and Kuiper) may be freed from their gravitational control by the vacuum impact of the Black hole, causing colossal cosmic collisions.

The disruption of gravitational balance

There is a sensitive relationship between the elements of the universe, such as electromagnetic, nuclear forces and an apocalypse may result from a disruption of these.

According to the general relativity theory, the time-space plane can be rolled or wrinkled up like a paper. The gravitational force of black holes can cause the displacement of stars which are interconnected through weak web of attractions. As if a piece of net takes a specific shape when loaded with heavy objects, the web of space-time, also known as the cosmos, could be distorted and even torn apart by black holes with their infinite mass “sitting” in it. This is a characteristic of black holes. A possible explanation for this might be that via elimination of common physical laws, the black hole region could become the gateway to metaphysical dimensions. Cosmos of space and time is described as strong-built, fracture-free in the Qur’an; “You do not see any fault or incongruity in the creation of the all Merciful. Look yet again: can you see any rifts?” (Al-Mulk, 67:3). However, in verses about the apocalypse, cosmic fractures that will occur is constantly repeated; “Day will come, land to be transformed into another, skies to be converted into others” (Ibrahim, 14:48)”On the day when the earth is changed into another earth, and the heavens (also)” (Abraham, 14:48), ”And the sky split asunder, and so, on that day it will be most frail” (Al-Haqqah, 69:16), and “The sky will cleft open thereby” (Al-Muzzammil, 73:18). We can conclude from these verses that new heavens would be created from these “fractures.”

The way that doomsday will actually take place is in the knowledge and control of Our Creator who executes these acts and maintains the order of the universe. Approaches and conclusions made with current physical and cosmic sciences will enable a better understanding of the verses related to doomsday.

The Sun rising in the West and the apocalypse

Can a comet or a planet change the direction of the earth’s rotation by colliding with it? Can the earth change direction and start to rotate from East to West instead of West to East? A catastrophic event like this may cause colossal destruction and end the lives of many organisms. As a matter of fact, a comet impact in recent years was detected to slow down the rotational speed of planet Jupiter.

Venus is a mysterious planet on many levels. For example it rotates in the opposite direction compared to other planets. Sun rises in the West on Jupiter. Dense rock and dust layers of Venusian atmosphere is theorized to be formed as a result of a collision, and because of this collision, it is thought to have started spinning in the opposite direction. A day in Venus is longer than a year. In other words Venus revolves around the Sun faster than it rotates around itself.

Bediuzzaman Said Nursi explains the sun rising in the West rather metaphorically as follows:

“While God knows best, the Qur’an, which is in effect the intellect of the earth, will disappear from its head at the end of time and, as a result, the earth will go mad. With Divine leave, it will collide with another planet and its rotation will be reversed. Through Divine Will, its journey from west to east will be reversed from east to west, and the sun will start to rise in the west. Truly, if the gravity of the Qur’an, which is the firm rope of God that binds the earth to the sun and the ground to the Divine Supreme Throne, is broken, the tether holding the earth will come unfastened. The earth will consequently become dizzy and deranged: on account of the reversal of its usual motion, the sun will rise in the west. Through its collision with another planet, Doomsday will begin at the Divine command.” (The Rays, p. 365)

Whichever way the earth comes to an end, even if the universe is not destroyed by an external destructive event, an apocalypse is foretold as something that will eventually happen with some mind-blowing descriptions in the Qur’an. What science speaks of black holes and other astrophysical possibilities in the universe seems to confirm these descriptions:

When the sun is folded up, and when the stars fall, and when the mountains are set moving. (At-Takwir, 81:1-3)
When heaven is cleft open, and when the stars fall in disorder and are scattered, and when the seas burst forth. (At-Taqwir, 81:1-3)

The Earth’s shape is becoming rounder as a result of the construction of projects like the Three Gorges reservoir. The weight decrease due to the melting icecaps has played a major role in these changes.

From time immemorial, humanity has wondered about the shape of the Earth. Over the centuries countless studies exploring the Earth and its shape have been conducted, and they still continue today. With advancements in technology, the methods and measuring devices have constantly changed. In earlier periods the Earth was believed to be flat; nevertheless from around the fifth century bc there were varying opinions suggesting that the Earth was actually round and calculations were conducted to measure its radius. Particularly from the seventh century ce onwards, the number of studies regarding what the Earth really looked like have increased tremendously.¹

In later years, with the advent of Islam and its open encouragement of Muslims to explore the universe and make advances in science, Muslim scholars made huge progress in astronomical research. Historians who have studied these advancements in astronomical science agree that the era between the eighth and fourteenth centuries can aptly be designated as a period of Islamic astronomy. In the years following the sixteenth century, significant research was undertaken in relation to the shape of the Earth and measurements of its radius in both the Islamic world and the West.

In the eighteenth century astronomic research and the advancement of technology proved not only that the Earth was round, but that it had a distinctive shape. According to calculations, the Earth was bulging around the equator and flattened at the poles. The maps produced by satellite systems show that the Earth is not completely round or smooth, but rather it has protrusions, creating an uneven surface that resembles a face with spots.2

“Geoid” is the term scientists prefer to use when referring to the physical depiction of the Earth’s surface. The shape of the Earth is not a perfect ellipsoid, thus, scientists use this representative surface that is thought to be most approximate to sea level, in order to identify departures from the ellipsoid shape. Due to the events of nature and human-related factors the geoid constantly changes, and this is why a precise mathematical account of the geoid has not yet been possible.

The Earth is known to be a geologically active planet. Just as everything else in the universe, from atoms to galaxies, has not been left to their own fate, the Earth is also constantly being transformed, thus making our magnificent ecosystem possible. The continuous geological process of changes in the Earth’s crust is related to a variety of factors: the varying density of the rock layers which form the Earth’s crust, the activity of the tectonic plates, as well as the movement of the continents, shifts in the center of gravity, tidal activity, hydro-spherical and atmospheric phenomena, and human intervention in some regions.

Researching the variations in the gravity of the Earth with satellite systems is a relatively new method of recording the changes in geoid elevations. The distance between the center of the Earth and its surface is constant (the tallest mountains will rise or decrease 1-2cm per year at most); if we take into consideration that the Earth’s physical body does not vary much and disregard the other forces, then we can say that the main reason for these infinitesimal changes in gravity on the surface of the Earth is due to differences in mass. While there is a decrease in weight in specific regions from melting glaciers, in other areas there is an increase in weight due to melting water flowing into reservoirs; both these phenomena play a significant role in the variations of the Earth’s gravity.

Even a minor variation in mass can be detected by measuring gravity. The change of mass location on the Earth’s surface results in gravity variations in the same region; in brief, today the commonly used gravity measurements are the most important source for detecting and identifying variations in geoid elevations, as well as determining the actual reasons for these changes. Gravity measurements are conducted via satellite systems; these indicate changes in mass location by detecting an increase or decrease in weight. The most modern technological satellite systems that can detect gravity change and allow us to follow the variations in masses on the Earth’s surface are the satellite used by the European Space Agency, called GOCE, and NASA’s satellite, called GRACE. GOCE has been designed to perform accurate studies of the Earth’s gravity field as it progresses into orbit. As the satellite passes over the regions where gravity is intense or weak, it measures the variations in gravity with signals that have been conveyed by a device called a gradiometer. GRACE is a pair of identical satellites that are flying in the same orbit, 136 miles apart; they orbit the Earth at a distance of 300 miles. These satellites can measure distances with microwave signals, and can detect changes of less than 1% the thickness of human hair; thus the twin satellites are able to accurately measure the distance to the surface of the Earth. The measurements provided by this satellite system make it possible for changes in gravity to be calculated. The GRACE satellite data is 1,000 times more accurate than other gravity field detection systems.

The enormous waves that occurred on the sea surface as a result of the Sumatra Island earthquake, which measured 9 on the Richter scale, caused a level ridge, measuring about six meters in height, to form on the shore. According to data produced by GOCE, such changes in the mass of the Earth’s surface caused a variation of 18 mm to occur on the geoid; this is recognized as a relatively high degree of change.

Changes in the polar glaciers also cause variations in the geoid; data provided from satellite GRACE shows that the layers of ice in Greenland and the Antarctica are melting at a higher rate than previously expected. The melting icebergs are causing a rise in sea levels of up to 0.41 mm every year and the weight of water produced from the melting icecaps is causing changes to the shape of the Earth’s surface.3

One of the interesting facts attained by GRACE is the changes in the Earth’s gravity field that have been caused by Three Gorges in China, the largest reservoir ever built. The lake region of the reservoir that is being built measures around 372 miles long, 70 miles wide and approximately 574 feet deep; when the casing of the reservoir is completed it will house an amazing 39.3 billion m3 (9.4 cu mi) of water. The area that this reservoir will cover once the project is completed is so great that it will make an estimated 1.5 million people homeless. It has been observed that the enormous accumulation of water in the completed sections of the reservoir has increased the gravity level in that region, which in turn has caused changes in the geoid structure.4

Scientists have confirmed that the Earth’s shape is becoming rounder as a result of the construction of projects like the Three Gorges reservoir. It is also estimated that the weight decrease due to the melting icecaps has played a major role in these changes. In some regions of Scandinavia and Canada the ground is rising 1 cm every year due to the melting glaciers. The water produced from the melting glaciers is forcing the currents in the Atlantic Ocean towards the equator, while the decrease of mass at the poles and the increase of weight in the equator region have caused significant changes in the shape of the Earth.

Many scientists claim that changes in the Earth’s surface have been caused by changes in the climate. Unfortunately, according to a report published by the UN Intergovernmental Panel on Climate Change (IPCC), humans are responsible for 90% of global warming. As a result of these vast variations, the geoid shape of the Earth is becoming rounder and its radius is increasing annually by 0.4–0.8 mm. The reasons for these changes are being closely monitored by scientists. According to scientists, the variation of the geoid that has been caused by changes in mass location is having an effect on the Earth’s dynamics, with the transfer of mass demonstrated by the changes in gravity causing a reduction in the speed of the Earth’s rotation around its axis; this is expected to result in variations in the daily time-zone.

Abdullah Sancak is pursuing an academic career in engineering in Turkey.

Notes

1. For more information on this topic see James R. Smith, Introduction to Geodesy, The history and Concepts of Modern Geodesy, John Wiley and Sons, Inc., 1997.
2. There are interesting images that show how the earth looks in the following link: University of Texas Center for Space Research and NASA (7 Haziran 2005) http://www.csr.utexas.edu/grace/gallery/gravity/
3. G. Ramillien, A. Lombard, A. Cazenave, E. R. Ivins, M. Llubes, F. Remy, R. Biancale, Interannual variations of the mass balance of the Antarctica and Greenland ice sheets from GRACE, Global and Platenary Change 53 (2006) 198-208.
4. San Shaoan, Institute of seismology, CEA, Wuhan, China, Gravity change before and after the first water impoundment in Three Gorges Project. http://www.sgg.whu.edu.cn/icct/html/icct_ppt/S1/sun.s.A___fourth.pdf

The sound of the sun

Sound waves are seismic waves which cause up-down and forward-backward movements. According to some scientists with poetic hearts the sound of the sun is like the sound of the heart beat. When a human’s heart beats, it makes varying sounds by contracting and relaxing, and cardiologists use these sounds to determine if there is a problem with the heart. Like the cardiologists who listen to our hearts, helioseismologists (scientists who research the sun’s seismic waves) listen to the sounds of the sun to learn more about its structure and mysteries. The power produced by these sounds makes the sun oscillate like a bell or tremble like someone suffering from a high fever. Another interesting point is that millions of different sounds have been discovered to emanate from the sun and every sound oscillates on a distinct frequency and displays a different pattern on the sun’s surface. If we compare the sun to a piano, a piano has 88 metal wires which produce sounds with varying tones, whereas the sun produces ten million notes. So the sun is like an enormous piano with ten million notes producing sounds at roughly five-minute intervals which create harmonic acoustics resembling the heart beat.

Scientists are trying to decipher these ten million different sounds, which brings us to another interesting point; we cannot hear the sound frequencies because they are too low (between 1–4 millihertz) for the human ear (the lowest range of human hearing is 20 Hz). 1–4 millihertz equals to a time span of 200–1,000 seconds, meaning that the sun oscillates once every 3–16 minutes. Even if our hearing ability was suitable, the sound would not reach us because there is no air or layer of gas between the earth and the sun to convey sound. If we could increase the sounds of the sun by 20,000–40,000 times, the sound humans would hear would only resemble a whisper. The sun is like a musical instrument that plays a continuous concerto of ten million notes every day in the sky above us, and we do not even perceive it. Can you imagine the astronomical music if we were to include the galaxy’s 200 million stars?

Scientists gather important information about the sun’s core by studying the echoes that appear on the sun’s surface from the energy produced from these ten million notes. The solar oscillations are divided into three categories called the p, g, and f modes. The p mode is the pressure of acoustic waves, g mode is gravity and the f mode refers to the surface-gravity waves. There are ten million of the p and f modes alone and the combination of these modes produce ten million different sounds.

In Bediüzzaman’s Risale-i Nur, his explanation of the letter “Lam” in the verse 36:38 in chapter Ya Sin in the Qur’an, affirms that everybody obtains understanding of this chapter according to his or her own spiritual senses and every chapter of the Qur’an contains thousands of aspects from which everyone benefits according to his or her own depth of understanding, from the common public to scholars, from scholars to the philosopher of the cosmos. In The Words, Nursi goes on to say, “Precise and wise scholars consider li to be causal and adverbial. They understand that since the All-Wise Maker operates behind the veil of apparent causality, He has tied the planets to the sun by His law of gravity and causes them to revolve with distinct but regular motions according to His universal wisdom. To produce gravity, He has made the sun’s movement on its axis an apparent cause. Thus a resting place means that “the sun moves in the place determined for it for the order and stability of its own (solar) system.” Like the Divine laws, that motion produces heat, heat produces force, and force produces gravity. … The sun is a light-diffusing tree, and the planets are its moving fruits. But unlike trees, the sun is shaken so that the fruits do not fall. If it were not shaken, they would fall and be scattered. They also may imagine the sun to be a leader of a circle reciting God’s Names, ecstatically reciting in the circle’s center and leading the others to recite. Elsewhere, I expressed this meaning as follows: ‘The sun is a fruit-bearing tree; it is shaken so that its traveling fruits do not fall. If it rested, no longer shaken, the attraction would cease, and those attracted to it would weep through space” (Twenty-fifth Word).

It is interesting that the sun’s oscillation, which modern science discovered in the 1960s, was mentioned much earlier by Bediüzzaman. In fact he went further and even explained the wisdom and necessity of the sun’s oscillation as a law of gravitation keeping the earth and the other surrounding planets in orbit. This is a subject which has only recently begun to be researched by scientists of the present. If we were to look further into the history of the valuable discoveries of Imam Rabbani, Ibrahim Haqqi of Erzurum, Ulug Bey, and many other scholars, we would be sure to encounter many other scientific facts.

References

1. “Solar Ellipticity Fluctuations Yield No Evidence of g-Modes,” J. R. Kuhn, K. G. Libbrecht and R. H. Dicke, Nature 319, 128 (1986).
2. “The Excitation and Damping of Solar Oscillations,” K. G. Libbrecht, B. D. Popp, J. M. Kaufman and M. J. Penn, Nature 323, 235 (1986).
3. “What do Observations Tell us about the Excitation of Solar Oscillation Modes?” K. G. Libbrecht, Proceedings of IAU Symposium 123, Advances in Helio- and Astroseismology (1988).
4. “Seismology of Solar Oscillation Line Widths,” J. Christensen-Dalsgaard, D. O. Gough, and K. G. Libbrecht, Astrophys. J. Letters 341, L103 (1989).
5. “Frequencies of Solar Oscillations,” K. G. Libbrecht, M. F. Woodard, and J. M. Kaufman, Astrophys J. Supp. 74, 1129(1990).
6. “Advances in Helioseismology,” K. G. Libbrecht and M. F. Woodard, Science 253, 152 (1991).

When the sky is cleft asunder; And when the planets are dispersed, and when the oceans are poured forth. (Infitar 82:1-3)

The events that are to occur on the Day of Judgment are clearly depicted in the Qur’an. The relevant verses emphasize that the Day of Judgment is not an ending that will only involve the Earth, but one which will also incorporate other planets on a universal scale.

Insofar as causes are concerned, what could be the force that will be able to disperse a robust system, rendering all forces including gravity obsolete and forcing planets and stars out of their orbits?

The following verses seem to imply that this force will also affect “lustrous” heavenly bodies:

When the sun is folded up, and when the stars fall losing their luster; and when the mountains are set moving. (Takwir 81:1-3)

For the word kuwwirat (folded up) in the verse “When the sun is folded up,” the famous scholar Fakhreddin Razi, in concordance with a narration from the third Caliph Umar, interprets this word to mean “to darken by expunging light.” Now, how could Divine Predestination operate on the physical world, in the folding and collection of light? In the past few years, scientists have been pondering the possibility of the gravitational power of black holes in accomplishing such a role. As we know, even light, alongside matter, cannot resist the irrepressible gravitation of the black hole.

The events depicted in the verses given above may be, with the will of the Creator, dependent on the gravitational power of black holes.

It is a fact that we’re sitting on a sphere of fire, as we speak, and the gases that constitute the atmosphere are held above the Earth by the force of gravity. With the impact of the strong force of gravity however, the air we breathe will be the first thing to vanish from the Earth’s atmosphere. Thus, with the disappearance of external pressure on such an occasion, internal pressure will gain ascendance in all creatures, who are composed predominantly of water (70%), causing them to shatter into pieces.

Along with other planets, the gravitational bonds of billions of stars (asteroids, meteors and comets) found on the two asteroid zones of the Solar System, all of which are sustained by Divine Power, will perhaps be torn apart with the force of black holes.

The geometrical gravity balances could perhaps also play a role in setting the Day of Judgment in motion. As can be observed in the General Theory of Relativity, the space-time levelness of the universe could, to quote the Qur’an, be folded and scrunched akin to a piece of paper, in which case, the stars, having been moved out of their places, will plummet from their positions.

Similar to how a cloth or net is elongated or pulled down under the impact of heavy objects, the universe (the net of space-time) will also stretch and yield, and in fact rip and crack, or more precisely be punctured, from the dense objects placed inside it, that is the black holes. The puncture, in this case, denotes the invalidation of physical laws.

It can be assumed that the black holes, placed at the center of the universe, will gradually expand, until the entire galaxy virtually becomes a black hole, and with the unification of every black hole, the whole universe will effectively be rendered a black hole itself.

When the camel goes through the eye of the needle…

Those who deny our revelations and scorn them, for them the gates of heaven will not be opened nor will they enter the Garden until the camel goes through the eye of the needle. Such is how we penalize the guilty! (A’raf 7:40)

A camel going through the eye of a needle calls to mind how the universal bodies will be passed through the singularity, the tiny openings of black holes. This comparison is reminiscent of how a giant sphere that comes within the swallowing vicinity of the black hole, may become stretched out to the point of becoming a virtual string, eventually becoming ingested by an object much smaller than itself.

A star, hundreds of thousands times bigger than the sun, could be reduced to the head of a needle once it begins to be warped by the black holes, phenomena in which space and time themselves are compelled to twist and turn.

The central area where the gravity force of the black hole is at its peak is described as “the event horizon.” The black holes could in fact be passages that allow us to enter other universes. In such a situation, we can hypothetically evaluate what will become of an astronaut who falls into a black hole.

We align our watches in correspondence with the astronaut’s, and bid him farewell towards the event horizon. As the astronaut approaches the event horizon where gravity gradually increases, we notice his watch is starting to operate more slowly. In the vicinity of the event horizon of a black hole the size of our sun, while our watches indicate that 1 second has passed, the astronaut’s watch will show that 3.3 seconds have passed, as time, where he is, flows much slower.

As our astronaut draws near to the event horizon, the 33 seconds indicated by his watch (10 times slower than before) will be equivalent again to our 1 second, and when he eventually and completely enters the event horizon, time will have frozen, halting the disparity between each second.

How would the space traveler perceive this hypothetical journey?

Not only will the space traveler become cognizant of the slower elapse of time, he may also witness an elongation of his body as he draws nearer to the event horizon. Since the force of gravity will take more of a toll on the extremities, that is the head and the feet, by the time the astronaut asks the question “What is happening?” he would already have begun to be extended like a string. The passing second for the astronaut progressively approaching the event horizon, will begin to become one month or one year later in the Universe. A pace away from the horizon the entire future of the Universe will fit into a single second of the astronaut, who, by now, is swiftly being pulled in to the point of singularity, finding himself on the other side. In this area, the Special Relativity Theory, essentially based on the thesis that the velocity of light is absolute velocity, i.e. the greatest velocity in the Universe, loses its validity, in that, as one approaches the singularity, the gravitational force affecting the astronaut or space ship will become so intense that the actual speed will surpass the velocity of light itself. Thus, the tangibility of a velocity greater than that of light will render all principles of causality obsolete, during which a regressive journey in time becomes practically possible. The interpretations of this issue are as such: A person plummeting into the well of singularity may live the whole history of the universe in the blink of an eye. They now have become a time traveler; the present, past, and future are all presented to their vision. As if passing through the eye of a needle, they may have passed through to another universe.

Imam Ghazzali, while interpreting the verses concerning the Day of Judgment, in his epistle Kashf al-Ulum al-Akhirah, puts the accent on Universal cessation:

“When God wills the commencement of the Judgment with the blowing of the Horn, you will see the mountains flying and moving about like clouds, seas amalgamating with one another, the Sun folded and being blacked out, the stars scattering around like beads disengaged from their strings, the sky rotating ferociously like a millstone, the ground trembling terrifyingly, stretching and expanding like leather. In that God will decree the dismissal of the orbits and no living thing will remain alive on earth or in the heavens. The spirited will surrender their spirits. The Earth and Heavens will be availed of their inhabitants.”

Said Nursi, alternatively, lays emphasis on the deterioration of the finely tuned connections, such as gravity, electromagnetic and nuclear forces, etc., attaching universal entities together, depicting the Day of Judgment in the following words:

“Consider the Qur’anic description of the minute and precise interrelationship of the universe’s constituent parts. Consider their sublime and delicate organization into a system. If any heavenly body were told to leave its axis, the universe would be thrown into the throes of death. Stars would collide, planets would be scattered, and the sound of exploding spheres would fill space. Mountains would begin to move, and Earth would be flattened. Eternal Power will bring about the next life in just this way, and the elements of Paradise and Hell will be separated from each other.”1

Regardless of how the Armageddon occurs, Nursi asserts that what has been repeatedly highlighted by the Qur’an will be realized:

“If the universe is not destroyed by an external destructive event, with the Eternal Will’s permission, it eventually will begin to die. Even scientists say this. According to the Qur’an, it will give a sharp cry, and then the following things will happen:

When the sun is folded up, and when the stars fall losing their luster; and when the mountains are set moving. (Takwir, 81:1-3)

When the sky is cleft asunder; and when the planets are dispersed, and when the oceans are poured forth. (Infitar 82:1-3)”2

Our aim here is to evaluate the incredible events miraculously foretold by the Qur’an from the cognitive perspective bestowed upon us by God through contemporary sciences and to gain broader points of view. Only God, however, can know the exact form of present and future events.

Notes

1. Nursi, Said. The Words, The Light, Inc., New Jersey: 2005, p. 546.

2. Ibid, p. 545.

Every soul shall have a taste of death (Quran 3:185). Like everything else, stars live and die. Would it make any difference if you knew that the iron in your blood and the calcium in your bones had been assembled inside stars? Atoms heavier than iron are formed by rapid nuclear reactions that can only occur when a massive star explodes. Gold, which is not crucial for our lives, and iodine, which is important for our health, are available, thanks to the violent deaths of massive stars.

The death of a star leads to one of three final states. Most stars, including our Sun, will become white dwarfs, stars about the size of the Earth, with no usable fuels. But the most massive stars explode and leave extraordinary objects behind; either a neutron star or a black hole.

The Sun resists its own gravity by generating energy through nuclear fusion. Under extreme conditions, four hydrogen atoms are combined to form a helium atom, and the mass difference between these atoms are converted to energy which can be calculated by Einsteins famous equation, E=mc², where m is the amount of mass converted to energy and c is the speed of light. In 4.5 billion years, the Sun will exhaust the fuel, hydrogen and helium stored in its core. This will start the chain of events that will result in its death. Since it will not be able to generate any energy to balance the huge weight of its outer layers, it will collapse. This will result in an increase in the temperature around its core. This temperature increase in the shell around the core will start new reactions which will produce excess amounts of energy. This extra energy will cause the Sun to expand and become a red giant. Its size will increase to such an extent that it will swallow Mercury and Venus, and maybe even our planet, Earth. As a giant star, it will have a strong solar wind that carries gas into space. Eventually, it will lose its outer layers, and produce a beautiful planetary nebula.¹ Soon the remains of the Sun will collapse and form a very compact object; a white dwarf. Imagine squeezing the Sun into a planet the size of the Earth. Gravity on a white dwarf is 10 million times greater than it is on Earth. Thus, a person weighing 150 pounds will weigh 1.5 billion pounds on a white dwarf. The white dwarf will burn 100 times fainter than our Sun; if the Earth survives the red giant phase, it will fall into a deadly deep freeze, and would not be a pleasant place to live.²

Medium mass stars, like the Sun, die relatively quietly as they exhaust their fuel and form white dwarfs. In contrast, massive stars live spectacular lives and destroy themselves in violent explosions. Massive stars have too great a mass to die as white dwarfs. They consume hydrogen and become red giants, but unlike the medium mass stars, their core temperature is high enough, about 1 billion degrees, to ignite carbon fusion. After they fuse carbon, they burn oxygen, neon, and magnesium to make silicon and sulfur, and then the silicon fuses to make iron. Iron is the most tightly bound of all atomic nuclei. Nuclear fusion is able to produce energy by combining less tightly bound nuclei into a more tightly bound nucleus, but iron is the limit. Once the core of the star has been converted to iron, there are no nuclear reactions that can burn iron and release the energy. Thus, the iron core is a dead end. The iron core sucks energy from the rest of the star. Since the star cannot produce any energy, it cannot resist its own gravity. In a fraction of a second, the star collapses in on itself. The collapsing core of the massive star quickly becomes a neutron star or a black hole. This collapse happens so rapidly that our most powerful computers are unable to predict the details. The envelope of the star collapses and bounces back off the dense core, which triggers a violent supernova explosion that expels the outer layers of the star to form an expanding supernova remnant. This explosion enriches the neighboring media with iron and other metals. If you throw a water balloon at your friend, your friend will get wet. Massive stars are not water balloons, but they are iron, silver, and metal balloons. When they explode, they seed the interstellar medium³ with metals. If there had not been a massive star death near our solar system when the Sun and the Earth were forming, our solar system would be iron-poor, and we would not be living today. Massive stars die so that we might live. The Quranic verse We have sent down iron, with its mighty strength and diverse uses for mankind (57:25) sheds light on this fact 14 centuries before it was discovered. Only in the past century, with the utilization of modern telescopes, have we had evidence of this. Nursi explained the above verse as iron is sent down together with the globe of the Earth from the Supreme Treasury, as a tremendous bounty. That is to say, the thing most necessary for the house of the Earth is iron, for when the All-Glorious Creator separated the Earth from the Sun and sent it down for mankind, He sent down iron together with it, and met most of mankinds needs with it. The All-Wise Quran decrees in a miraculous fashion: Use this iron in your works and try to excavate it and take advantage of it.⁴

A neutron star, on average, is 1.4 times more massive than the Sun, and is compressed to a radius of about 6 miles. Its density is so high that matter is stable only as a fluid of neutrons. An atom is mostly empty space. The nucleus of an atom is very small compared to the size of the atom. If we represent the nucleus of an atom with a blueberry, then the distance between the nucleus and the electrons would be as great as the height of the Empire State building. If you could eliminate the empty space in atoms, you would be able to squeeze stars larger than the Sun into a radius of about 6 miles (the radius of a neutron star). A neutron star spins several times a second, and has a magnetic field a trillion times stronger than that of the Earth. Observational evidence for neutron stars was first found in 1967 when astronomers found a neutron star (pulsar) rotating around itself in 1.3 seconds and sending radio pulses to Earth. If you have a large enough antenna, you can pick up periodic radio signals from pulsars. On Earth, a teaspoon of the material from a neutron star would weigh 100 million tons.

Another scenario for the end product of the death of a massive star is a black hole. When the core of a star contains more than 3 times the mass of the Sun no known force can stop it when it collapses. The object will not stop collapsing when it reaches the size of a white dwarf or a neutron star, because the electrons or neutrons cannot support the weight of the star. The object will collapse to zero radius (or almost zero radius) and form a black hole. Objects need high speeds to be able to leave another object, to be able to resist falling back due to the gravitational pull of the other object. For example, a space shuttle must reach a speed of 11.2 km/s to to be able to leave the gravitational pull of the Earth in order to go into space. Gravity is so strong near black holes that the escape speed from a black hole is greater than the speed of light. Thus, even light cannot escape; this is the reason why these phenomena are called black holes.

As an object collapses, its gravity increases. If it collapses to zero radius, its density and gravity become infinite. Such a point is called a singularity. Clocks slow down near a singularity. If we were able to watch a person falling into a black hole, we would see them moving more slowly as they came closer to the black hole. In fact, the person would never disappear from sight. From where we were standing, this person would fall more and more slowly, until finally they would hardly seem to move at all. Generations later, our grandchildren would be able to look at this friend approaching the black hole, but never crossing the event horizon (the boundary of the black hole). Black holes are not giant vacuum cleaners that will pull in everything in the universe. A black hole has a huge gravity pull, but its force is quite small if you are not near it. If the sun were replaced by a black hole of a similar mass, the orbits of the planets in our solar system would not change at all. The gravity of a black hole becomes extreme only when approached. There are many black holes in the universe, but they do not pose any threat for us as long as we stay away from them. Next time you advise your children to stay away from strangers, remember to tell them to stay away from black holes, as well.

Footnotes

1. A planetary nebula is an expanding shell of gas ejected from a star, and it has nothing to do with planets.
2. Seeds, M.A., Horizons: Exploring the Universe, 2002, Brooks/Cole
3. The gas and dust between stars.
4. Nursi, S., Flashes, Sozler Yayinevi, 28th Flash

Modern theories of creation are built upon quantum theory and Einstein’s theory of gravity. The question is what happened before the Big Bang? Einstein’s equations break down at the enormously small distances and large energies found at the universe’s origin. At distances 10-33cm, quantum effects take over from Einstein’s theory. For questions involving the beginning of time, one must invoke the ten-dimensional theory. The Big Bang probably originated in the breakdown of the original ten-dimensional universe into a four- and six-dimensional universe. Therefore, the history of the Big Bang represents the breakup of previously unified symmetries, and the split universe was no longer symmetrical. Six dimensions have curled up.

Quantum physics abolishes time close to the Big Bang. How did the universe come into existence? Why does time vanish in the black hole? Did time exist before the universe came into being? These questions and realities point to the existence of a Creator.

Unfortunately, quantum theory and Einstein’s theory of gravity are mutually incompatible. In this new millennium, superstring theory, or simply string theory, resolves this tension. Three particle theorists (Yoichiro Nambu, Leonard Susskind, and Holger Nielsen) independently realized that the dual theories developed in 1968 to describe the particle spectrum also describe the quantum mechanics of an oscillating string. This marks the official birth of string theory in 1970, according to which the marriage of the laws of the large and the small is not only happy but also inevitable. Brian Greene writes in his The Elegant Universe: String theory has the inherent capability to show that all of the astonishing happenings in the universe”from the frenzied dance of subatomic quarks (components of protons or neutrons) to the stately dance of orbiting binary stars, from the primordial fireball of the big bang to the majestic whirl of celestial galaxies”are reflections of one grand physical principle, one master equation.

Fundamental forces

During the past hundred years, physicists have proven the existence of four fundamental forces in nature: Gravitational force, electromagnetic force, the weak force, and the strong force. Gravity, the most familiar force, keeps Earth revolving around the sun and our feet planted firmly on the ground. Electromagnetic force, the next most familiar force, is the driving force for such things as lights, TVs, computers, and telephones.

The strong nuclear and weak nuclear forces are less familiar, because they operate in the atom’s nucleus. The strong force (mediated by gluons) keeps quarks glued together inside protons and neutrons, and keeps protons and neutrons tightly crammed together inside atomic nuclei. The weak force (mediated by W and Z particles) determines the radioactive decay of such radioactive materials as uranium, plutonium, and tritium.

Gravitational force is mediated by graviton (the concept of graviton was introduced in 1974), photons for the electromagnetic force (a photon is the smallest EM force or the smallest packet of energy for light). In Einstein’s day, the strong and weak forces were unknown. For 30 years Einstein sought to unify the two distinct forces of gravity and electromagnetism.

String theory

Matter is composed of atoms, which in turn are made of nucleons (protons and neutrons in the nucleus) and electrons orbiting around the nucleus. Nucleons are made of three quarks each. Quarks are made of string. According to the standard model of particle physics, the universe’s elementary constituents are point-like ingredients with no internal structure. However, this standard model cannot be a complete theory, for it does not include gravity. But according to string theory, atomic and subatomic particles are not point-like; rather, they consist of tiny one-dimensional filaments somewhat like infinitely thin rubber bands. Physicists call these vibrating, oscillating, and dancing filaments strings.

String theory takes its name from this point of view. Unlike an ordinary piece of string, which itself is composed of molecules and atoms, the strings of string theory are alleged to lie deeply within the heart of matter. They are so small”on average about as long the Planck length (10-33 cm, or about 100 billion billion [1020] times smaller than an atomic nucleus)”that they appear point-like even when examined with our most powerful equipment. String theory offers a far fuller and more satisfying explanation than that of the standard model.

Moreover, this theory shows the harmonious union of general relativity and quantum mechanics”a major success. In this new millennium, the excitement in the physics community is that string theory may provide the unified theory of all four forces and all matter. For this reason, string theory sometimes is described as possibly being the theory of everything.

String theory proclaims that the observed particle properties (i.e., mass, charge, and spin) are reflections of a string’s various vibrations. Each preferred pattern of a string’s vibration in string theory appears as a particle whose mass and force charges are determined by the string’s oscillatory pattern. All fundamental particles can be described as resonant patterns of these string vibrations. There is even a mode describing the graviton. The same idea applies to the forces of nature as well. Hence everything, all matter and all forces, is unified under the microscopic string oscillations”the notes that strings can play.

Extra Dimensions

Our universe has three spatial dimensions: length, width, and height. In formulating the general theory of relativity, Einstein showed that time is another dimension. According to the general theory of relativity, space and time communicate the gravitational force through their curvature. The special theory of relativity is Einstein’s law of space and time in the absence of gravity.

In 1919, the mathematician Theodor Kaluza unified Maxwell’s electromagnetism and Einstein’s theory of general relativity by adding a fifth dimension. Thus Kaluza was the one who suggested that the universe might have more than three spatial dimensions.

For example, a garden hose viewed from a long distance looks like a one-dimensional object. When looked at closely, a second dimension, one shaped like a circle and curled around the hose, becomes visible. The direction along the hose’s length is long, extended, and easily visible. The direction circling around its thickness is short, curled up, and harder to see. Hence spatial dimensions are of two types: large, extended, and therefore directly evident, or small, curled up, and far harder to detect. As for the garden hose, the curled-up dimension encircling its thickness is detected either moving closer to the hose or using a pair of binoculars from a distance. If the hose is as thin as a hair or a capillary, its curled-up dimension is more difficult to detect.

In 1926, the mathematician Oskar Klein applied Kaluza’s theory to quantum theory, which is used in modern string theory. Klein showed that our universe’s spatial fabric may have both extended (the three spatial dimensions of daily experience) and curled-up dimensions. The universe’s additional dimensions are tightly curled up into a tiny space, a space so tiny that it has so far eluded detection. These extra dimensions are believed to be minuscule, somewhere between 10-35 meters and 0.3 millimeters in size.

The equations of string theory show that the universe has nine space dimensions and one time dimension. At present, no one knows why the three space and one time dimensions are large and extended, while all of the others are tiny and curled up.

Supersymmetry

Symmetry is a physical system property that does not change when the system is transformed. For example, a sphere is rotationally symmetrical, since its appearance does not change if it is rotated.

In 1971, supersymmetry was invented in two contexts at once: in ordinary particle field theory and as a consequence of introducing fermions into string theory. It holds the promise of resolving many problems in particle theory, but requires equal numbers of fermions and bosons. Thus, it cannot be an exact symmetry of Nature.

Supersymmetry, a mathematical transformation, is a symmetry principle that relates a particle’s properties of a whole number amount (integer) of spin (bosons) to those with half a whole (half-integer or odd) number amount of spin (fermions). Bosons tend to be the mediators of fundamental forces, while fermions make up the matter experiencing these forces. Bosons can occupy the same space and have an integral spin (0,1, .), while fermions cannot occupy the same space and have a half-integral spin ( 1/2, 3/2,.). Bosons transmit such forces as photons, gravitons, W and Z particles, mesons, and gluons. Many bosons can occupy the same state at the same time. Fermions (e.g., electrons, muons, tau, protons, neutrons, quarks, and neutrinos) cannot share a given state at a given time with other fermions. The fact that fermions make up matter explains why we cannot walk through walls: the inability of fermions (matter) to share the same space the way bosons (particles of force or energy) can.

Supersymmetry treats all particles of the same mass as different varieties of the same superparticle. This means that there is an equal matching between bosons and fermions. A supersymmetric string theory is called a superstring theory. The original string theory only described bosons, and hence became known as bosonic string theory (BST). Thus it did not describe fermions or, for example, include quarks and electrons.

Introducing supersymmetry to BST engendered a new theory that describes both the forces and the matter making up the universe: the theory of superstrings. String theorists have shown that all string theories are different aspects of a string theory that has not 10 but 11 spatial dimensions. This was called M-theory. The M might stand for the mother of all theories or mystery, magic, matrix, or membrane. The last two refer to mathematical techniques used in science. There is no space or time in M Theory. Furthermore, our space-time is not four-dimensional after all. M theory unites the four forces of nature (e.g., gravity, quantum mechanics, strong force, and weak force) and, remarkably, is a mathematical and geometrical theory. It is attractive because it can explain gravity and an atom’s inside at the same time and thus resolve the contradiction between current theories.

Summary and Conclusions

String theory gives a theoretical description of elementary particles and treats them as one-dimensional curves (strings). Traditional models of interactions between elementary particles are based on quantum field theory, which treats particles as dimensionless points. Theoretical physicists have not developed a workable theory of gravitation that is consistent with quantum mechanics’ principles.

However, treating elementary particles as strings permits the derivation of a quantum theory that encompasses all four forces. Superstring theory, a combination of string theory and supersymmetry, treats particles as very short (10-33 cm along its single dimension, which is 1020 smaller than a proton’s diameter) closed strings (string loops). All of the masses, charges, and other properties of elementary particles result from the vibration of these superstrings at different frequencies. The complex mathematical basis of superstrings involves 10 dimensions: 9 spatial dimensions, 6 of which are invisible, and time. Since superstring theory provides a unified description of all elementary particles and fundamental forces, it is sometimes called the theory of everything.

Some major unsolved problems of string theory are how to condense, 10 dimensions to 6 (spatial) plus 4 (space and time) dimensions, and what is happening at distances smaller than 10-33 cm. In addition, the experimental verification of the existence of strings in the near future poses quite a challenge. Since they are thought to be less than a billionth of a billionth the size of an atom, we cannot use current technology to detect them directly. An indirect test, however, will be carried out within the next decade or so by the Large Hadron Collider, a huge atom smasher being built by CERN (European Organization for Nuclear Research, located in Geneva, Switzerland). There also is an urgent need to develop new mathematics in areas of Riemann surfaces, algebraic geometry, singular geometries, number theory, and other related fields. 

Footnotes

1. K stands for Kelvin, a measurement of degree relating to, conforming to, or having a thermometric scale on which the unit of measurement equals the centigrade degree and according to which absolute zero is 0A , the equivalent of “273.16A C.

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