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September 30, 2014

Homework Help: physics

Posted by jason on Saturday, October 25, 2008 at 4:28pm.

The sun rotates around the center of the milky way galaxy at a distance of about 30,000 light years (1ly= 9.5*10^15m). if it takes about 200 million years to make one rotation, estimate the mass of our galaxy. Assume that the mass distribution of galaxy is concentrated mostly in a central uniform sphere.

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