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Mathematics 21 Online
OpenStudy (anonymous):

The distance from the sun to the nearest star is about 4x10 to the 16th meters. The Milky Way galaxy is roughly a disk of diameter ~ 10 to the 21power meter and thickness ~ 10 to the 19power meter. Find the order of magnitude of a number of stars in the milky way. assume the distance between the sun and our nearest neighbor is typical.

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