If our universe is expanding, how long will it expand?Will it ever contract?

Answer 1

Nobody knows. There are only guesses.

Answer 2

Scientists gues that the universe will continue to expand indefinitely based on the big bang. The "expansion" is the light from the big bang reaching into new areas - so it expands at the speed of (this now dim) light.

Some scientists speculate that it could contract, but I don't know much about that.

As the other person said, it's all theory - Big Bang is just one of the more popularly accepted theories.

Answer 3

A theory has been raised that the universe, which is made up of trillions and trillions of different systems interacting simultanously, behaves like every other system. This includes birth, life, death and rebirth. If you look at the life span of a star, it forms from the aggregation of matter, such as gas and dust, which were expelled by a dying star, such as a supernova. Then, the star, if it is big enough, commences nuclear fusion, like our Sun, converting hydrogen to helium. The star lives for a few billion years before, when the star runs out of "fuel," it collapses under its own gravity expelling gas and dust throughout the cosmos creating yet another cradle of starbirth. This cycle is played out on earth as well. Every cell in our bodies lives and dies. Every species on the earth lives and dies. Decaying animal matter eventually forms dirt which causes plant growth. Using this as evidence, the theory is that the universe was formed in a gigantic reaction, spewing out every elemental particle and element in existance. With gravity (the attraction of matter to other matter) these particles joined together in grand scales to form galaxies, which are still expanding through the endless vaccum of space, millions of light-years (the distance light travels in one year) apart. It is not uncommon to believe that the universe will eventually lose the battle to gravity and an eventual "big crunch" will take place, effectively ending the universe. Who is to say that this is the end of the cycle, or out of this comes yet another "big bang" emulating the cycle of life and death? Time will tell, if you can wait that long...

Answer 4

The universe won't be able to have an part because of the fact if there have been an part, there may be something previous the sting, and although grow to be previous the sting, whether it have been in simple terms empty area, might, by utilising definition, be a element of the universe. The universe is the two infinite, wherein case it has no edges or borders, or it is embedded in a greater physically powerful-dimensional area, wherein case it is finite yet unbounded.

Answer 5

The big bang theory tells us that it will expand for awhile. Eventually everything will get so spread out that it will close back in on itself (due to some physics that I don't know) and then get so compact that it explodes back out, repeating the big bang. The big bang theory basically proposes that we're in a cycle that has been repeating itself infinitely. Humans will not survive this.

Answer 6

The universe is expanding like a balloon and eventually will become a vortex.

Answer 7

Why worry how long its presumably to expand. Is it something of concern ? We did not creat it . It isnt our problem.
Whether is expands or doesnt expand at all most of us pecuneous poor souls dont really care.

Answer 8

That is subject to much debate. Some believe someday the universe will contract , while others believe it will expand until it is so sparse they will be nothingness.

Answer 9

Hi. It depends on the actual amount of mass in the universe. And knowing this requires us to understand all of the gravitational forces, like dark matter's. We base estimates on the total based on what we can see but we do not see everything.

Answer 10

The universe is the ultimate perpetual motion machine

Answer 11

Some people believe that there are parallel universes.