Question

Is the universe finite or infinite? ​

Answer 1

Answer:

Because we live in three dimensions, 250 times the radius means (250)3 times the volume, or more than 15 million times as much space. But, big as that is, it still isn't infinite. A lower bound of the Universe being at least 11 trillion light years in all directions is tremendous, but it's still finite.

Answer 2

Most of the observations done to date, paired with current theoretical models, suggest that the density of matter and energy in the universe is less than the critical density, so we conclude that the universe is infinite." Current observations are within error bars of critical density, to a precision of a few percent