While examining the spectrum of a galaxy you find all the hydrogen lines are shifted to longer ...

While examining the spectrum of a galaxy you find all the hydrogen lines are shifted to longer wavelengths. This galaxy is:
 
  A) moving away from us.
  B) moving towards us.
  C) expanding explosively.
  D) blue shifted.
  E) not forming new stars.

Question 2

Compared to a 5-inch prime focus reflector, a 5-inch Newtonian reflector will:
 
  A) have more light gathering power.
  B) have the same light gathering power.
  C) be easier to build.
  D) will have more chromatic aberration.
  E) will have a larger hole in the center of its mirror.

Question 3

The clouds of Jupiter are primarily composed of liquid hydrogen.
 
  Indicate whether the statement is true or false

Question 4

For luminosity classification, fat stars have skinny spectral lines.
 
  Indicate whether the statement is true or false