Why do we believe that starburst galaxies represent a temporary ...

[NguyenJ]

Why do we believe that starburst galaxies represent a temporary stage in galaxy evolution?
 
  A) We observe starbursts to last only a few years at a time.
  B) Such galaxies produce so much light that they would have consumed all their gas long ago if they had always been forming stars at this high rate.
  C) We don't see any nearby starburst galaxies.
  D) All starburst galaxies look like normal spiral galaxies, aside from the starbursts.

Question 2

The amount of time between successive passes of any given star across the meridian is
 
  A) 23 hours 56 minutes.
  B) 24 hours.
  C) 365.25 days.
  D) 12 years.
  E) 26,000 years.

[batool]

Answer to Question 1

B

Answer to Question 2

A