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doit_the_clown doit_the_clown
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7 years ago
What is the most important use of Cepheid variables for astronomers?
A)   The distance to a Cepheid variable can be found very easily.
B)   The characteristics of the pulsation of a Cepheid variable can be used to investigate conditions in the core of the star.
C)   The diameter of a Cepheid variable can be found very easily.
D)   The metal content of a Cepheid variable can be found very easily.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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discovererdiscoverer
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7 years ago
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doit_the_clown Author
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7 years ago
this is exactly what I needed
kiara23247843
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Yesterday
Just got PERFECT on my quiz
foxrcng11
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2 hours ago
Thanks
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