Multiple Choice
You observe the following three galaxies and measure their respective recession velocities: A, 2,100 km/s; B, 4,400 km/s; and C, 3,050 km/s.Which of the following must be true about these galaxies?
A) A is smaller than B.
B) A has more star formation than C.
C) B has more stars than C.
D) B is farther away from us than A.
E) They are all members of the Local Group.
Correct Answer:
Verified
Correct Answer:
Verified
Q42: As measured from Earth, the spectrum of
Q43: Galaxies move away from us in all
Q44: Cosmological redshift is redshift due to<br>A) the
Q45: Which of the following would be the
Q46: What important event in the universe's early
Q48: What do astronomers mean when they say
Q49: A galaxy is measured to have a
Q50: Astronomers use galactic redshift as a measure
Q51: Explain how Hubble's law can be used
Q52: Hubble's constant, H<sub>0</sub>, represents the<br>A) rate of