Question

If there are an infinite number of stars and infinite number of galaxies, what fills space between two different galaxies?

Answer 1

Dark matter.

Explanation:

From recent discoveries of astronomers, they have found out that dark matter is responsible for expansion of the universe, and dark energy fuels the dark matter. But dark matter and dark energy are invisible to the normal eye. So, I can fairly predict that dark matter fills the emptiness of the vast universe and normal matter is in a small amount compared to dark matter.