Question

A galaxy is likely to be a collection of which of the following

1. Universe and interstellar matter
2. Stars and interstellar matter
3. Clusters and constellations***
4 stars and clusters

Answer 1

3. would be the correct answer

Answer 2

Answer: Stars and interstellar matter

Step-by-step explanation:

Clusters are a group of galaxies so that can't be correct. A universe is bigger than a galaxy so it can't be that. Constellations are a group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure. So the only answer is stars and interstellar matter.