A cluster containing a thousand or more galaxies, usually mostly ...

[madam-professor]

A cluster containing a thousand or more galaxies, usually mostly ellipticals, scattered over a volume only a few Mpc in diameter is referred to as a(n) _____.
 
  A) elliptical galaxy cluster
  B) irregular galaxy cluster
  C) poor galaxy cluster
  D) rich galaxy cluster

Question 2

The Andromeda Galaxy has a look-back time of:
 
  A) 4 years.
  B) 2000 years.
  C) 2 million years.
  D) 2 billion years.

[vish98]

Answer to Question 1

D

Answer to Question 2

C

[madam-professor]

Thanks for the timely response, appreciate it

[at]

Great answer, keep it coming