Multiple Choice
The Tully-Fisher relationship relies on broadening of the 21-cm radio line in distant spiral galaxies.What causes this broadening?
A) Thermal motion of the gases in the galaxy
B) Random motions of the stars in the galaxy
C) The rotation of the galaxy
D) The general expansion of the universe (Hubble flow)
Correct Answer:
Verified
Correct Answer:
Verified
Q50: Whether a protogalaxy evolves into a spiral
Q51: As gases spiral in toward a supermassive
Q52: When two galaxies collide,it is highly likely
Q53: How did Edwin Hubble show that the
Q54: Starburst galaxies occur when a rapid and
Q56: The observation by Hubble that demonstrated for
Q57: The Eddington limit is the maximum diameter
Q58: What assignment is given to a galaxy
Q59: Which of the following techniques are NOT
Q60: Evidence for the existence of supermassive black