Question

is universe finite or infinite? what is the centre of universe ?​

Answer 1

There is no centre of the universe! 
According to the standard theories of cosmology, the universe started with a "Big Bang" about 14 thousand million years ago and has been expanding ever since. Yet there is no centre to the expansion; it is the same everywhere.

So it can be said that universe is infinite..✌✌

Answer 2

Hey Mate..

It is impossible to know for sure if the universe is truly infinite. The observable universe is definitely finite - it is that part of the universe which is within 13.80 billion light years of us.

There is no centre of the universe! According to the standard theories of cosmology, the universe started with a "Big Bang" about 14 thousand million years ago and has been expanding ever since. Yet there is no centre to the expansion; it is the same everywhere. The Big Bang should not be visualised as an ordinary explosion. The universe is not expanding out from a centre into space; rather, the whole universe is expanding and it is doing so equally at all places, as far as we can tell.

Hope it helped:-):-)