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Tsync Tsync
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Posts: 3450
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8 years ago
What is one of the differences between Cepheids and RR Lyrae variables?
A) The RR Lyrae stars have much shorter periods than Cepheids.
B) Cepheids are giants, but RR Lyrae stars are still on the main sequence.
C) All Cepheids have the same brightness, but RR Lyrae stars vary greatly in luminosity.
D) The pulsations of RR Lyrae stars are much less regular than those of Cepheids.
E) The period-luminosity relation holds only for RR Lyrae stars.
Textbook 
Astronomy Today

Astronomy Today


Edition: 8th
Authors:
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Minoring in physics
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RatatouilleRatatouille
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8 years ago
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Tsync Author
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8 years ago
This astronomy class is killing me, thanks for chiming in and answering
Minoring in physics
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8 years ago
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