Multiple Choice
The Andromeda spiral galaxy is almost edge-on to us. Astronomers have detected the orbital motion of this and other such galaxies' disk material by
A) using Hubble's law.
B) measuring Doppler shifts of different parts of the disk.
C) the steady state theory.
D) measuring Doppler shifts of different parts of the disk.
Correct Answer:
Verified
Correct Answer:
Verified
Q116: The figure shows an image of a
Q117: Why are there few quasars at low
Q118: Why do astronomers believe supermassive black holes
Q119: Which kind of active galaxies has been
Q120: Recent high resolution radio observations show that
Q122: The Hubble law is a relation between
Q123: The total mass of galaxies in a
Q124: If Galaxy A is found to have
Q125: Active galaxies are thought to have _
Q126: Where jets run into surrounding gas in