Homework Help: astronomy

Posted by Sethi on Friday, April 27, 2007 at 12:42pm.

Two stars in a binary system are determined from their position on the H-R diagram and the mass-luminiosity relation to have a combined mass of 8 M. Their orbital period, P, is 1 year. What is their orbital seperation, a?

http://en.wikibooks.org/wiki/Astronomy/Mass

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