Question

The universe was born in a violent expansion. Will it contract under its gravity?is the universe finite or infinite

Answer 1

We do not know but we have theories

Explanation:

There are several theories regarding the ultimate fate of the Universe, ond of them is called the Big Crunch, in which the Universe will contract and collapse on itself. But there are no definite proof that which one or anyone of these will happen.

And then the size of the Universe, the answer is the same as above: we don’t know for sure. The diameter of thr observable universe is estimated to be about 93 billion light years, and that is expanding when light outside of the observable universe reaches us (from our POV). So the universe is definitely bigger than what we can see. Therefore, the Universe could be infinite, but we cannot be sure of it.