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Suppose we observe a Cepheid variable in a distant galaxy. The Cepheid brightens

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Suppose we observe a Cepheid variable in a distant galaxy. The Cepheid brightens

Suppose we observe a Cepheid variable in a distant galaxy. The Cepheid brightens and dims with a regular period of about 10 days. What can we learn from this observation?
A) We can learn the distance to the galaxy.
B) It will allow us to calculate the rotation rate of the galaxy.
C) It will allow us to determine the mass of the galaxy.
D) Under the rules of the International Astronomical Union, we will be entitled to naming rights for the galaxy.

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killian Author

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9 years ago

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