Which of the following observational techniques is most ...

[soccerdreamer_17]

Which of the following observational techniques is most appropriate for measuring Doppler shifts?
 
  A) timing (measuring how the amount of light changes with time)
  B) imaging (taking a picture)
  C) spectroscopy (taking a spectrum)

Question 2

The text states that luminous matter in the Milky Way seems to be much like the tip of an iceberg. This refers to the idea that ________.
 
  A) black holes are much more interesting than ordinary stars that give off light
  B) luminous matter emits white light, much like the light reflected from icebergs
  C) the luminous matter of the Milky Way is essentially floating on the surface of a great sea of dark matter
  D) dark matter represents much more mass and extends much further from the galactic center than the visible stars of the Milky Way

[sarahccccc]

Answer to Question 1

C

Answer to Question 2

D

[soccerdreamer_17]

Thanks for the timely response, appreciate it

[raenoj]

Great answer, keep it coming