What is Hubble's law?
A) The longer the time period between peaks in brightness,the greater the luminosity of the Cepheid variable star.
B) The recession velocity of a galaxy is directly proportional to its distance from us.
C) The recession velocity of a galaxy is inversely proportional to its distance from us.
D) The faster a spiral galaxy's rotation speed,the more luminous it is.
E) The faster a spiral galaxy's rotation speed,the less luminous it is.
Correct Answer:
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Q27: Hubble's "constant" is constant in
A)time.
B)space.
C)space and time.
D)our
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Q32: What makes white-dwarf supernovae good standard candles?
A)They
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Q34: What is the most accurate way to
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