Question
A Cepheid star in another galaxy is observed to pulsate with a period of 3 days....
A Cepheid star in another galaxy is observed to pulsate with a period of 3 days. The star is 100,000 times fainter than a solar-mass star 1 kpc away in the Milky Way. Calculate the distance to the galaxy.
A. 1 pc
B. 100 pc
C. 10 kpc
D. 3.3 Mpc
E. 10 Mpc
Homework Answers
Answer #1
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