Elliptical galaxies appear red because:
A) they are moving away from us
B) they contain mostly ionized hydrogen gas
C) they contain mostly old stars
D) they contain lots of dust
E) they contain a mix of old and young stars
Correct Answer:
Verified
Q26: Active star formation does not occur in
Q27: Two elliptical galaxies have the same apparent
Q28: Which of the following is NOT a
Q29: We classify galaxies by:
A) their true shapes
B)
Q30: The Hubble classification scheme for galaxies sorts
Q32: Which of the following would NOT be
Q33: What type of galaxy is this?
Q34: Why is 21-cm radiation a good tracer
Q35: Approximately _ of spiral galaxies are barred.
A)
Q36: Spiral structure can be triggered in a
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