Consider a binary system in which both stars have circular orbits. For star 1, the radius of this orbit is 0.500 AU. For star 2, it is 0.125 AU. The period of revolution of both stars is 96 days and 11 hours. (Recall that there are about 365.25 days in a year on average. The days given here are 'mean solar days" that last exactly 24.00 hours) (
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