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Home Q & A Board Science-Related Homework Help Physics
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symbo symbo
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7 years ago
The observational fact about a Cepheid variable star that leads to a measurement of its distance from us is that its period of variation is directly related to its
A)   surface temperature.
B)   position along the spiral arms of a galaxy.
C)   apparent magnitude.
D)   absolute magnitude.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
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hyponoticahyponotica
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7 years ago
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symbo Author
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#2
6 years ago
This did it for me! Thank you
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