Question

Why can we not see stars in other galaxies?

Answer 1

There will be billions of stars in one galaxy.Our eye do not have resoling power to separate stars in the far away galaxy.

Explanation:

Only very huge telescopes like 200 inch in mount wilson can resolve the stars in a galaxy..Galaxy may be one or two degree in space but in this small space there are about 400 billion stars.

Answer 2

The neighboring galaxy Andromeda is about two million light years away. Galaxy is seen as a whole, as what it was millions of years ago...

Explanation:

Reference: David H. Levy, Deep Sky Objects, 2005, pp 187 - 218