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Cosmology

~2400 answered questions
Parent Category: Physics
Cosmology is the area of physics that studies the universe in and of itself. Through the use of incredible and ingenious methods of experimentation, cosmologists attempt to discover how the universe began, how it is developing, and how or if it will end. Questions regarding the Big Bang, dark matter, dark energy, the cosmic background radiation, and the initial formation of the fundamental particles can be placed into this category.
Islamic answer: Per Islam teachings and per the God holy book of Quran, Allah (or God and same God worshiped in Christianity and Judaism) is the first before any first we know or we don't know and the last after any last we know or we don't know. َQuran says (meaning English translation) (57:3): …
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The universe is so, extremely giant, it's pretty much impossible to actually imagine how big it really is. The best thing to do is to start with something small and work up from there; so let's start with the Earth. Earth may seem a giant place to us humans, but no where near in size to the universe…
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Not since the Big Bang. Your question seems to suggest that you accept the idea of a Big Bang, since you use the term 'Big Bang' as a reference to time. The concept of infinity also is used in reference to time. unending time. Time as we perceive it began at the instant of the Big Bang. Along wit…
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It is space itself that is expanding.However, what is the space expanding into nobody knows, we can only make guesses.
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Big Bang The Big Bang theory is an effort to explain what happened at the very beginning of our universe. Discoveries in astronomy and physics have shown beyond a reasonable doubt that our universe did in fact have a beginning. Prior to that moment there was nothing; during and after that moment t…
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The universe is incomprehensively vast. Nonetheless, some day it will cease to exist as we currently perceive it. The sun will use up all its fuel and die in about 5 billion years or so. At that time the solar system will no longer be habitable. Will humans be around at that time? No one knows. The…
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Based on current estimates, there are between 200 - 400 billion stars in our galaxy (The Milky Way). There are possibly 100 billion galaxies in the Universe. So taking the average of our galaxy, gives approximately 3 x 1024 stars. So about 3 septillion. This has been equated to the same number of gr…
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Dark matter wasn't "discovered" by any one person or group. In fact it is still hypothetical and there is no solid proof for its existence. Various astronomers inferred the existence of dark matter from what they observed about galaxies and galaxy clusters. It is still very much a mystery and the su…
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All the following text was not added by me, but there are 2 main answers:1. the Universe is absolutely, resolutely infinite (it's hard to get your head round, I know).2. the Universe is a certain size- although this is almost impossible, as the Big Bang would make it expand perhaps forever. 2 also c…
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Ways that Earth Can be Destroyed? There are several ways in which the Earth might be "destroyed", such as every single nuclear bomb available to man going off simultaneously the Earth moving even more off its axis collision with an asteroid or comet depletion of the ozone layer However, none of th…
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Disclaimer: Further content is theoretical, as wormholes themselves are theoretical. To understand wormholes first you must understand that although we live in a 3-dimensional universe (actually it's 4-dimensional but thats a story for another time), and that it doesn't stop at 3-dimensions. There …
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That's a very good question, and the truthful answer is "Nobody knows for sure". Many have said, however, that the universe was very likely created as the energy and mass expanded. So the "dark, empty void" that is the fabric of space was actually created as the energy from the Big Bang moved outwar…
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Space Space is an infinite extension of any 3D region filled with matter. If that is the case, that would mean that the was no space before the big bang-where the universe begun hence space is the property of the universe meaning space must have been created with/by the big bang .If space were to…
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The term "singularity" is used in several contexts. In mathematics, this is the point at which the plot of the graph turns straight up or becomes discontinuous. In physics, a singularity is a point of transition, where the normal laws of physics would yield nonsensical results. In astronomy, an exa…
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After the Big Bang, just three things resulted in the formation of this vast universe... protons, neutrons and electrons... I completely agree with the answer and that's purely true!
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The Big Bang is the best theory we have, it is supported by abundant evidence, and is the closest we can get to the Univere's origin. The cause of the Big Bang is only speculation and may never be fully known, but that does not mean the Big Bang itself didn't happen. Some people put God as the cause…
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We have no way of knowing the answer. Will the universe ever end at all? Again, we don't know. Right now, we suspect that the universe may expand forever; we cannot "see" enough mass to cause the expansion to slow down. But then, we can't see enough mass to keep the Milky Way together; it is spinnin…
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The evidence to date suggests something on the order of 25 - 30 billion light years in diameter. IMPROVED ANSWER - This question doesn't make any sense because your question means like if you are asking about how much a car had traveled which started travelling billions years ago. So the appropria…
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According to current physics: 1) Matter2) Space3) TimeOutside of the universe is devoid of any of these three things.
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The vast surrounding space and everything in it is called the universe. The universe includes everything that exists:- stars, planets, asteroids, comets, meteors and meteorites.
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no one really knows about the beginning of time but bacteria was formed to make a monkey and eventually it came to our stage ANOTHER ANSWER: Time is "physical." We measure it by the rotations of the earth and orbits of the planets in the universe as observed from a fixed point on our planet. …
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There is insufficient information at this time to answer this question; many varying and conflicting theories and hypotheses exist, however, many of these even vary among interpretation (for example, the unified 'fundamental theory of physics,' m-theory, can be interpreted to call for infinite unive…
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So far we aren't sure. In general, dark matter is a form of matter we cannot directly observe; its existence can only be inferred through gravitational interaction with baryonic "light" matter. Basically, Dark matter is stuff we can not see or detect but we think must be there. Because we can not s…
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No one knows for sure yet.There are different theories about it but none have been proved. I think it consist of energy. ( Just my dumb guess)
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Scientist George Cresswell No the universe does not end its just hard for humans under stand because where a small planet in a big universe.Thanks alot.Answer (2) What I always thought of was the word nothing, nothing is something by being itsself which is nothing...but that's something still so im…
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Cosmology is the study of the Universe as a whole. While astronomy studies individual celestial objects such as stars, planets, and galaxies, cosmology focuses on the big picture: How the Universe works, how it came into being, and how it might end. It studies the structure of galaxies and the struc…
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Many scientists believe that all of the material of the universe, in the form of energy, was once crammed together in one place. Then about 15 billion years ago a rapid expansion of this energy commonly called the "big bang" occurred. The energy expanded and cooled, and as it cooled particles began …
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Answer At the moment, there are no other earths (or similar planets) that we know of. Some people claim it is possible, though. The expanse of the universe indicates an order of eternal things in form and in substance, thus, the possibility of other earths is not very remote, although, there is…
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It is hard to dispell the thought that Earth has the only living organisms in the entire universe. There is no concrete evidence of other lifeforms outside of Earth, but one has to think there has to be somewhere in areas we haven't even looked at with a telescope yet! We may one day prove that …
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Big Bang is a cosmological model of the initial conditions and subsequent development of the universe. It is supported by the most comprehensive and accurate explanations from current scientific evidence and observation. As used by cosmologists, the term Big Bang generally refers to the idea that th…
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There could be many answers to this including serious, philosophical, spiritual, mathematical, and then the nonsense and funny answers. My opinion is that there are many secrets we have yet to learn about our universe. For an example of one amazing secret of our universe, read about the "Divine Rati…
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The universe is probably finite and unbounded. A sphere's surface is finite and unbounded. You can travel along the surface of the earth without ever hitting a boundary. The universe is like that, only in a multi-dimensional sense. It is not something that can be easily pictured or imagined. No, A…
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You will find it interesting that in fact dark matter has not yet been discovered. We are trying hard to observe evidence of dark matter, but it is not revealing itself at this time. It is theorized to be there, based on what we know about how the galaxies are moving and how they are interacting wit…
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It has mass and density, and adds to the gravitational pull backward.
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The word universe meaning all (or all as one(uni=1)) is everything around us. Impossibly big to imagine, this is all the galaxies and planets and stars ever catalogued and more. Some people believe their are others but these ideas are bleak and uncertain. Light itself is slow comparative to its mas…
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There are some theorys like the big crunch when the universe turns back to its normal state when it is smaller than a atom. Also the big rip when everything heats up and explodes. Finally the big freeze when all the stars will die out because the universe keeps expanding.Note:The consideration for w…
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This is a question that is difficult to answer because there is so much we still don't know. However, based on what we do know, there is no cause for concern. Most scientists doubt that the universe will end at any time soon. There is no evidence of any catastrophic event that might cause such a thi…
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Mostly "HYDROGEN GAS"The main theory that describes the formation of the universe is the 'big bang' theory. It suggests that an explosion had taken place after matter of different unknown elements gathered together to form a dense cloud. Today on the earth we live, elements we use, etc. were formed…
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It's not certain that there is an answer to this question. The big bang was the beginning of the universe... not stars and planets and stuff. but of the universe itself. The very question of what was "before" may well be meaningless.
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In every direction, distant galaxies are moving away from us, and the farther they already are, the faster they're moving away. The best estimate right now is that the speed of retreat increases about 70 km/sec for every 3.26 million light years ... the number known as the "Hubble Constant". If…
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Solid, liquid, and gas
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Big Bang Cosmology (BBC) states the space within our Universe has been expanding at a (more or less) constant rate, for a period of time on the order of ten billion years. BBC does NOT state there was an explosion of matter into empty space, it states that space itself has been expanding. Hope thi…
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Scientist theorize that the universe started out as an infinitly dense ball of energy that somehow exploded into what the universe is today. My theory is that the universe was some sort of giant atom that was somehow split by a wayward electrical charge within the quantum sigularity.
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§WHO§knows§§§
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According to current understanding, there is not really any definite moment at which it will end. It will simply expand faster and faster, available energy will decrease over time (Second Law of Thermodynamics!), and the reduction in available energy will make it harder and harder for any type of li…
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when the world was so young the stars all incident each other and blast is called the big bang..
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AnswerAccording to the emerging "membrane" theory also known as "M" Theory, it might very well have existed. Membrane theory, or "brane" theory, is a development of string theory from its merging with Super Gravity theory placement of 11 dimensions rather then 10 dimensions (as stated by "string" th…
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The Universe, as unimaginably vast as it is, will eventually cease to exist, at least as we currently know it. Whether it will truly "end" and exactly what will happen to it, scientists still aren't sure. The Universe's fate will come billions, maybe even trillions of years from now, and the human r…
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Nobody knows how long it will be until the universe ends. It seems likely that the universe will last for billions more years.
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Not everyone agrees on who created the universe, or even if there was a higher power that created it. Some believe God created it. Others believe the universe was not created, but came together through natural events. It's up to each individual to answer this question for themselves. Some opinions …
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The distances between galaxies and groups of galaxies gets larger. There is too much gravity keeping galaxies together to get any expansion within them or even between tight local clusters of galaxies. In some millions of years there will be no galaxies visible from our except the local six, the rem…
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EVERYTHING comes to an end; but we don't know what kind of end it will be, or when.
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This is not known. All that is known about dark matter is that it has mass. Searches are underway to try to work out what it is. The existence of dark matter was learned rather recently, and its composition is still being speculated, hence the name. There are several theories about what dark matter…
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The entire universe means everything everywhere. The cosmos is another word for the entire physical universe. So that means everything on Earth, in the Solar System, the stars, the galaxies, the dust in space, the so-called dark matter, in fact everything that exists.
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In Theory; Approximately 73% dark energy, 23% dark matter, and 4% normal (baryonic) matter. As far as we can tell now, the universe is made of energy, some of which appears in the form of matter. Matter is composed of particles called atoms. Atoms form molecules; a molecule is the smallest part …
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Although all matter in the universe was initially formed during the earliest stages of the Big Bang (in the form of hydrogen, which later fused into heavier elements in the center of stars), it is not accurate to say that the Earth was created by the Big Bang. Earth, like all celestial bodies, was c…
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Dark energy is a hypothetical form of energy that we still know very little about, and is a relatively new discovery. Dark energy helps to explain many of the phenomena observed in the Universe, such as the large-scale structures and arrangements of galactic clusters. It is said to permeate all of s…
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basically whenever the sun dies, but that will not happen for a few million years
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We don't know. All we know (or, really, ever can know) is that the state of the universe currently is largely consistent with it having happened. There are a few things to quibble about (the Inflationary Epoch, for example), but by and large, all the evidence points to it having happened.The evidenc…
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\"No one knows if the universe ends. It could end or it could not. No one has an answer.\" < I doThe consideration for whether our universe is truely endless depends on one's determination of what the universe means to them. It could be said that the universe is endless because its very determina…
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Probably not. The universe has been here a long, long time. There is a lot of matter around, though it's concentrated in galaxies and the like. Even as gravity concentrated the matter into these "islands of stars" it would have also pulled on antimatter. There would have been a lot of annihilation. …
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Caltech astrophysicist Fritz Zwicky (Swiss) first offered the idea of something that later evolved into dark matter back in 1933. The puzzle hung around for a long time with no action. Then in 1975, Vera Rubin and her fellow staffer Kent Ward stunned the astronomical world. The two were at the Carne…
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It came from an explosion, commonly known as the Big Bang, although it probably made more of a hissing sound. Something exploded and now there is the universe. No-one is quite sure what happened before this. It does not go back that far. God created it in six days- having a rest on the seventh. He…
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Matter can be made of waves and energy. Solids, gases, and liquids are also the three states that it can be in.
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Scientists say, The Big Bang.Christians say, God.
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Edwin Hubble has been given most of the credit for figuring out that the Doppler redshift from faraway galaxies means that they are receding from us at an incredible rate; and the further away they are, the faster they're receding. The first to propose what became known as the Big Bang theory (no …
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While many religions have their own stories for the creation of the Universe, the most widely accepted scientific explanation for the formation of the Universe is called the Big Bang Theory. According to this model, about 13.7 billion years ago the entire Universe was once contained in an extremely …
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It is simply called "Universe" which derives from a Latin phrase roughly meaning "everything rolled into one". Some multiverse/omniverse theorists tend to give names to our universe as an identifier. It's also common in science fiction to give the universe a name.
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In the Universe the largest object structurably is Sloan Great Wall which is1,370,000,000 light years wide and the biggest physical object is the Observable Universe Which is 93,000,000,000 lights years in diameter
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Superluminosity is currently what is believed to be the fastest thing in the universe.
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Answer sorry. Try this, we (the parts (atoms ... particles) that make us up) were all a part of the bang. in a sense we're still inside it ... or its residue. Everything we can see is big bang. and the latest guess is 13.7 billion years. ANSWER: First of two assumptions, is that there is a …
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The method of the formation of the universe is best explained by the Big Bang Theory. At some point, a massive "explosion" of "material" occurred. This material was composed of the superforce. It was all tightly compacted in a small space.Then, it all exploded. As it expanded creating space and time…
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The universe may be:1) "open", which means it will continue to expand forever but at a decreasing rate. 2) "flat", which means it will eventually stop expanding but never reverse. 3) "closed", which means the universe will expand to a maximum size and then collapse in upon itself in a reversal of th…
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"Dark matter" is the way that lazy scientists sometimes refer to "stuff we can't see". The problem is that we can calculate how fast the galaxy is spinning, and we can -very roughly! - figure out how much mass is detectable in the galaxy. The problem is that there isn't enough mass to hold the galax…
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The first cosmologists used telescopes as well as the naked eye to observe the universe. The astrolabe was measured a star's altitude and observatories were built to help with observations. Other tools included armillary spheres and the quadrant.
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James Chadwick
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when the big bang started.
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In Science: Yes, the universe is infinite, since it is constantly expanding. In Theory: No, the universe is not infinite. Since space is full of curves, as theorized by Albert Einstein, maybe space is just one big curve. Maybe traveling in a straight line inevitably leads into one big curve, until …
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Cosmos, in astronomy, the entire physical universe considered as a unified whole (from the Greek kosmos, meaning “order,” “harmony,” and “the world”).
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1) The existence, isotropy, and spectrum of the Cosmic Microwave Background Radiation. It was predicted sixteeen years before it was detected, and has been found to be exactly as proponents of Big Bang Cosmology (BBC) say it should be. All other hypotheses are reduced to saying, "I know the CMBR is …
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The cause of the Big Bang is largely speculative and is one of the most difficult questions to answer. It is a complicated and perplexing issue that is a topic of some serious research by scientists. We will probably never find concrete evidence for what caused it because this is outside our realm o…
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If you are asking what caused the theory, as opposed to what caused the big bang itself, the answer would be: observations, made by American astronomer Edwin Hubble, of red shifts in the spectrum of galaxies proportional to their distance from us.
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Answer There is only one known universe - the one we inhabit. Theoretically, there could be many other universes in what is sometimes called the 'multiverse', but the distances involved mean we will probably never know. Galaxies are the largest substantial groupings within a universe. Our galax…
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Big Bang Cosmology states that our Universe has, over the last 13 billion years or so, been expanding such that the distance between every point in our Universe to every other such point is increasing. There is no center out of which matter came, no explosion, no "bang" -- just an ongoing expansion …
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Plasma is the most common state of matter.
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The Big Bang theory is a theory that some scientists believe to be the beginning of the Earth.
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Answer Isn't that a mind-blowing question? People have been pondering it for as long as we could ponder. No one knows why, and 'why' doesn't really work well as a question for something like this. The universe is what it is. A related question that some scientists put forward is this: Could the …
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anti-matter are particles found only in outter space. they are completely opposite to matter. we all know that an electron of an atom is negetively charged but in anti matter the electron is positively charged and the proton in a regular matter is positively charged but in anti matter it is negative…
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Ignore it. Parents tell children "there is no such thing as ghosts" not because there are no ghosts, but because disbelief takes power from the disanimate. If you can't ignore it bring light. Seriously - most little kids instinctively know this. Light a match or a candle, turn on a flashlight, flip…
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The sun gives us light and heat. The sun helps plants grow , which helps us live and breathe. The sun keeps us from getting to cold or become frozen.The sun provides virtually limitless energy for Earth. Without the sun, plants could not photosynthesize and produce food, so everything would die o…
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There is a theory that a Big Bang took place to form the universe. The energy released in that event formed the matter that now occupies a tiny fraction of expanding space. Scientific Theory of Planetary Accretion Dust and meteorites left over from the formation of the Sun amalgamated over millions …
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Obviously, there are many theories of how the universe formed, but personally, the universe formed from the result of a black hole, that sucks in matter, and that matter has to empty out somewhere, and it does, as a "white" hole, and that explosion is known as "The Big Bang".
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If you split white light in a prism you will get a spectrum of colours - Red, orange yellow, green, blue, indigo, violet - and you will see that they merge into each other. Each colour has a different wave length and as wavelength is a continuous (as in not discrete) variable then you could argue th…
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Mathematically speaking, singularities are infinitely small and have no size or volume. The Heisenberg uncertainty principle dictates that all of the matter and energy may have been in a volume of zero. This means that effectively there is nothing measurable there.Note: The analogous expression of t…
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The Big Bang Theory states that the entire Universe came into being after rapidly expanding from a singularity of infinite density.
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one unless you believe in the multiverse
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Because it is growing at an exponential rate.
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A significant discovery can be credited to Edwin Hubble. He made the observation that the distances between galaxies was expanding, a fact that could be explained equally well EITHER by Steady State Hypothesis or by a Big Bang. Indeed, for more than three decades after Hubble's work, most cosmologis…
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The Big Bang theory is the prevailing cosmological model that describes the early development of the Universe.[1] According to the theory, the Big Bang occurred approximately 13.77 billion years ago,[2] which is thus considered the age of the universe.[3][4][5][6] After this time, the Universe was i…
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That would be cool, but to go to a parallel (opposite) universe, you would to have an power device, I can't think of it. But to go there would be very interesting.Many physicsmodels, plus various string theory models predict that they may, or that our universe in one "bubble universe" in a multivers…
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