Multiple Choice
Which of these observations are NOT used for the measurement of distances to distant galaxies?
A) Cepheid variable stars
B) width of the 21-cm H I radio emission line
C) supernova explosions
D) brightness and pulsation rates of pulsars
Correct Answer:
Verified
Correct Answer:
Verified
Q180: Which of these characteristics does the Local
Q181: The mathematical form of the Hubble law
Q182: Which single major problem perhaps puzzles astronomers
Q183: Lenticular galaxies, S0, have no spiral arms.
Q184: What is an SBc galaxy?<br>A) galaxy with
Q186: Spiral density waves move through a medium
Q187: The Tully-Fisher relationship relies on broadening of
Q188: The amount of visible matter in a
Q189: The Hubble law states that<br>A) all objects
Q190: The relationship between a galaxy and the