Question

I'll give medal!!!
1. What was the original reason for identifying and naming nebulas?

2. Are all double stars binary stars?

3. How can astronomers tell if groups of stars actually form a star cluster?

Answer 1

It's earth science but I posted it here because no one's active in the earth science forum.

Answer 2

O.o yeah IDK if I can help on this.

Answer 3

Sorry.

Answer 4

Crap thanks anyway for looking at it

Answer 5

@january123

Answer 6

idk sorry

Answer 7

Oh and on the second question, if its yes or no I'm required to have an explanation.

Answer 8

aww thanks anyway @january123

Answer 9

:( tag a mod or something

Answer 10

Ok