How the big crunch theory explain the universe?

Answer 1

This refers to the idea that the Universe, which is currently expanding, might contract again, and that all matter would combine into a very small space. This seems unlikely to happen; the observational evidence shows that the expansion of the Universe is ACCELERATING - it is expanding faster and faster.

Answer 2

Strangely enough -- it doesn't! Big Bang Cosmology simply describes what has happened AFTER the space within our Universe began to expand. How space and matter got there, why it began to expand, why inflation started, and why inflation stopped are all, at present, unknown -- just like the exact cause of lightning in the sky is unknown.

Answer 3

An excellent question! Too bad that we don't have an answer.

Some astronomers believe that the Big Bang dispersed all the matter and energy in the universe, that there ought to be a force that will draw everything back together in a "big crunch" many billions of years from now. All that galaxies that are flying apart, in this theory, should someday slow down, reverse course, and come back together. This idea of an oscillating universe, alternately expanding and contracting, is a very attractive one to many scientists who accept principles of symmetry in nature.

At present, however, we do not see enough mass in the universe to reverse the expansion and bring everything back together. This is one of the reasons for the concepts of "dark matter" and "dark energy"; if there is enough indetectable mass in the universe, perhaps the universe may be closed and there may be some incredibly distant future in which all matter crashes together - perhaps then igniting the seed of the next "big bang".

So any answer at this point would be entirely premature; considering how much we have learned in the last century, can we reasonably place any limits on what we may learn in the next?

Answer 4

The Big Crunch theory is when the expansion of the universe slows and the universe begins contract. The theory was that the force of gravity would make the universe implode, (gravity pulls the universe into itself) inevitably bringing the universe to an end. Recent research has proven that the universe is not contracting but instead expanding. The force that is making universe expand is called "dark energy".

Answer 5

It tells us that the Universe's expansion will not continue forever. Instead, at a certain point in time, it will stop expanding and collapse into itself, pulling everything with it until it eventually turns into the biggest black hole ever. Well, we all know how everything is squeezed when in that hole. Hence the name Big Crunch.

The big crunch (the closed universe) theory is that if the universe exceeds the critical density then the outwards spread of the universe will no longer be able to overcome gravity. The universe will then 'collapse' in on itself possibly into a singularity.

Answer 6

Big Bang Cosmology makes NO definitive statement about what happened before the space within our Universe began to expand about 13.8 billion years. BBC only states that expansion has been occurring over that time period. What happened before is, at this point, almost speculative at best.

Answer 7

After the big bang theory yes the universe increased but it also increased in mass, as in the fact's given to us by Edwin Hubble the redshift and the cosmetic background radiation caused a conflict and made the earth increase in mass.

Answer 8

The Big Bang theory explains that the Universe is expanding. Of course, if it continues expanding, at some time it must get to be a certain size. (Note that it is not currently known how large this size is.) On the other hand, according to the anthropic principle, we must be in a fairly early stage of the Universe - while there is still lots of available energy.

Post script:

Absolutely right. Just a short note to say the Universe is not only expanding, but it is accelerating its expantion, due to the still mysterious «dark energy».

Some cosmologists defend the hypothesis of the Universe will end in a «Big Rip», others defend the «Big Freeze».

Either way, we (the Human race) will not be arround to see it...

Answer 9

The Big Bang Theory presupposes a secular rationalization for the creation of the observable universe; i.e. the observable universe is Time bound (or has a finite existence). The Big Bang Theory present the theoretical premise for the causation, termination, and continuation of an evolutionary expansion of the universe.

Answer 10

The Big Bang is the dominant (and highly supported) cosmology of the beginning state of our Universe. In essence, it states that our Universe began from an initial state of very high density and temperature, which has expanded over billions of years to form a Universe as we now observe it. Together with Inflation, certain predictions of what we would see today in our Universe are made -- and pretty much all of said predictions have been confirmed.