The spectra of most galaxies tell us that
A) galaxies appear to be moving away from us.
B) their light comes predominantly from objects other than stars.
C) most galaxies contain clouds of gas that are absorbing their favorite wavelengths.
D) galaxies in the past rotated at a faster rate than they do today.
E) galaxies are rushing through space in all directions.
Correct Answer:
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Q33: If a galaxy has an apparent velocity
Q34: The rotation curve of a galaxy is
Q35: Astronomers use galactic redshift to estimate
A) gravity.
B)
Q36: You read about the discovery of quasars
Q37: Type Ia supernovae have a peak luminosity
Q39: If you found a galaxy with
Q40: The nearest known quasar shows a redshift
Q41: Which of the galactic rotation curves in
Q42: For which galaxies would it be easiest
Q43: Dark matter is most likely made up
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