How to weigh a star using a moon

Friday, October 15, 2010 - 14:10 in Astronomy & Space

How do astronomers weigh a star that's trillions of miles away and way too big to fit on a bathroom scale? In most cases they can't, although they can get a best estimate using computer models of stellar structure. An astrophysicist says that in special cases, we can weigh a star directly.

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