February 20, 2017

Homework Help: Astronomy

Posted by Anonymous on Saturday, November 20, 2010 at 11:07pm.

The apparent brightness of a Cepheid variable star in a far-away galaxy is measured to be 640,000 times fainter compared to an equivalent star 2,000 light years away from the Sun in our Galaxy. Assuming that there is no light absorption between galaxies, what is the distance to the host galaxy of the Cepheid?

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