A Classical Cepheid Variable Star Is Seen to Vary Regularly

question 92

Multiple Choice

A classical Cepheid variable star is seen to vary regularly with a period of 25 days. Approximately how many times brighter than the Sun would this star appear to be if it were to replace the Sun in the solar system? Refer to Figure 16-4 from the text.

• A) 1000
• B) 4
• C) 10,000
• D) 10²

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