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 there was something: our universe. The big bang theory is an effort to explain what happened during and after that moment.
According to the standard theory, our universe sprang into existence as "singularity" around 13.7 billion years ago. What is a "singularity" and where does it come from? Well, to be honest, we don't know for sure. Singularities are zones which defy our current understanding of physics. They are thought to exist at the core of "black holes." Black holes are areas of intense gravitational pressure. The pressure is thought to be so intense that finite matter is actually squished into infinite density (a mathematical concept which truly boggles the mind). These zones of infinite density are called "singularities." Our universe is thought to have begun as an infinitesimally small, infinitely hot, infinitely dense, something - a singularity. Where did it come from? We don't know. Why did it appear? We don't know.
After its initial appearance, it apparently inflated (the "Big Bang"), expanded and cooled, going from very, very small and very, very hot, to the size and temperature of our current universe. It continues to expand and cool to this day and we are inside of it: incredible creatures living on a unique planet, circling a beautiful star clustered together with several hundred billion other stars in a galaxy soaring through the cosmos, all of which is inside of an expanding universe that began as an infinitesimal singularity which appeared out of nowhere for reasons unknown. This is the Big Bang theory. Big Bang Theory - Common Misconceptions
There are many misconceptions surrounding the Big Bang theory. For example, we tend to imagine a giant explosion. Experts however say that there was no explosion; there was (and continues to be) an expansion. Rather than imagining a balloon popping and releasing its contents, imagine a balloon expanding: an infinitesimally small balloon expanding to the size of our current universe.
Another misconception is that we tend to image the singularity as a little fireball appearing somewhere in space. According to the many experts however, space didn't exist prior to the Big Bang. Back in the late '60s and early '70s, when men first walked upon the moon, "three British astrophysicists, Steven Hawking, George Ellis, and Roger Penrose turned their attention to the Theory of Relativity and its implications regarding our notions of time. In 1968 and 1970, they published papers in which they extended Einstein's Theory of General Relativity to include measurements of time and space.1, 2 According to their calculations, time and space had a finite beginning that corresponded to the origin of matter and energy."3 The singularity didn't appear in space; rather, space began inside of the singularity. Prior to the singularity, nothing existed, not space, time, matter, or energy - nothing. So where and in what did the singularity appear if not in space? We don't know. We don't know where it came from, why it's here, or even where it is. All we really know is that we are inside of it and at one time it didn't exist and neither did we.
Big Bang Theory - Evidence for the Theory
What are the major evidences which support the Big Bang theory?
* First of all, we are reasonably certain that the universe had a beginning.
* Second, galaxies appear to be moving away from us at speeds proportional to their distance. This is called "Hubble's Law," named after Edwin Hubble (1889-1953) who discovered this phenomenon in 1929. This observation supports the expansion of the universe and suggests that the universe was once compacted.
* Third, if the universe was initially very, very hot as the Big Bang suggests, we should be able to find some remnant of this heat. In 1965, Arno Penzias and Robert Wilson discovered a 2.725 degree Kelvin (-454.765 degree Fahrenheit, -270.425 degree Celsius) Cosmic Microwave Background radiation (CMB) which pervades the observable universe. This is thought to be the remnant which scientists were looking for. Penzias and Wilson shared in the 1978 Nobel Prize for Physics for their discovery.
* Finally, the abundance of the "light elements" Hydrogen and Helium found in the observable universe are thought to support the Big Bang model of origins. Answer
It is difficult to "look back into time" and answer a question like this. There are several different ideas floating among astrophysicists. The idea of strings as a source for the Big Bang is one hypothesis, but is currently untestable. The lion's share of the ideas we have concerning the origin of the universe at time zero are all based in mathematical models. Multi-dimensional manifolds set out what happened the instant space and time began to be created here and spacetime unfolded into the universe we know today.
For all the tap dancing, posturing and brilliant calculations being put forth, the short answer in that no one has the faintest idea. Something does not suddenly appear from nothing. Either the universe has always been here or it had a beginning. If it had a beginning than a split second before this there had to be nothing. Some say it must have been God others, particularly scientists, avoid the question rather doggedly. What we do know is that something can not suddenly appear where there is nothing, at least not with our current knowledge.
I've become very religious as a result of studying the universe.
It could be anything that caused this singularity (and how it came to be), even beyond our wildest imagination (may be or may not be a God/Gods, could be something else that we don't even know yet for sure, no one will know unless maybe you time travel back to the origin or bend the laws of Physics and travel even before that and return back to present time safely in one piece or find a way to communicate with present time across time and space)
The Big Bang Theory states that the entire Universe came into being after rapidly expanding from a singularity of infinite density.
The prevailing hypothesis of the Big Bang Theory is that the Big Bang formed from a singularity.
The big bang theory proposes that the universe came from the point that was singularity , it states that after the bang the universe started expanding thus it explains everything that how was universe how and why it is expanding ,what happened after the big bang
The Big Bang almost certainly did occur.A singularity, on the other hand - whether it is the singularity of the Big Bang, or the singularity in a black hole - probably indicates that something is incomplete in our current understanding of physics.
A star did not cause the Big Bang. Stars did not yet exist, and formed long after the Big Bang. The Big Bang was the expansion of the Universe from a singularity, not a star.
A theory suggests that the universe may be like a pulse that keeps on expanding and contracting. When the universe has no where else to expand to after the big bang, and the force of gravity brings it back into its original position, the point of singularity may happen again, from all the compressed material. Then the process starts again.
Most scientists believe that an infinite dense singularity existed before the incident known as the Big Bang.
A singularity is the name given to the pre-Big Bang Universe. All matter and energy were compacted into an extremely small area, smaller than an atom, smaller than the nucleus of that atom - a singularity. After the Big Bang, the Universe spread out from this singularity and is still expanding today.
There is not a theoretical way to determine "where" the Big Bang occurred. In point of fact,the idea of a "where" existing before time and space began hasno meaning at all. Since theoretically the Big Bang resulted from a singularity, then the where, when, how, and why ofour unfolding and evolvingSpaceTime continuum(or our traditional four dimensional universe) must be based from this pre-Big Bang singularity. You would need to approachsuch queries from the perspective of "what" isthis singularity.
Big bang theory isn't really based on a belief system but is a conclusion drawn from the observation of the universe; the universe can be seen to be expanding today, if you work backwards then it's concluded that at some point the universe was a singularity. As to what was before the big bang, there are a number of suggestions; one is the universe will expand to a maximum then contract back down to singularity and another big bang will occur - this may have happened many times.
A singularity, made of unimaginably dense material.
A singularity is a point in space-time in which matter and energy are infinitely dense, as at the center of a black hole or at the moment of the Big Bang.
in big bang theory the particles will just move away outside. while in big bounce, a stage will come when all the particles once again will form singularity as the result of big crunch. that's what i think.
When Matter and anti-matter collided the Big Bang came into existence. But something still remains a mystery that how did the Matter and anti-matter come.
Neptune came from the big bang like the rest of the planets it was formed by all of the gasses that were let off when the big bang happened.
Most scientists believe that the universe existed as a dense singularity before the Big Bang.
the big bang theory
Given that the conditions of the big bang are entirely theoretical, it is unfortunately not even possible to theorise much on what was there before. At the moment of the big bang all matter in the universe would seem to have been part of a 'singularity'. This singularity must have been incredibly small and incredibly dense but is as yet (and maybe always) beyond our understanding.
No. The universe came from the Big Bang. The solar system did not form until several billion years later from the collapse of a nebula.
There was a big bang.. then space came with lovely stars but there was no planets.. when alot of rocks formed together another big bang had come and made.. EARTH!
There was a singularity.All matter in the universe has expanded outward from a single point.
No; there would be no stars to produce the gamma rays.
The humans came to earth from a "big bang" long time ago.
The Big Bang theory is an effort to explain what happened at the very beginning of our universe,our universe sprang into existence as "singularity" around 13.7 billion years ago.