Question

what is inside Andromeda galaxy?

Answer 1

it is a Galaxy which is near to our Earth, little bit smaller than our milky way galaxy, and it is estimated ..that in future it will collide with our Galaxy.
inside it's there are planets, stars, Nebula,
maybe life may exist on that galaxy as there can be condition suitable for life..
no, any human till now has not crossed, Jupiter,so how can they .
it is a assumption.that life may or may not be there. we have come to know about that galaxy because of our Hubble telescope, satellites.

Answer 2

Answer:

The Andromeda Galaxy, also known as Messier 31, M31, or NGC 224 and originally the Andromeda Nebula, is a barred spiral galaxy approximately 2.5 million light-years from Earth, and the nearest major galaxy to the Milky Way