The sun revolves around the center of mass of the Milky Way galaxy in an orbit that

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The sun revolves around the center of mass of the Milky Way galaxy in an orbit that is approximately circular, of radius a ≈ 2.8 × 1017 km and velocity v ≈ 250 km/s. Use the result of Exercise 2 to estimate the mass of the portion of the Milky Way inside the sun’s orbit (place all of this mass at the center of the orbit).


Data From Exercise 2 

Using Kepler’s Third Law, show that if a planet revolves around a star with period T and semimajor axis a, then the mass of the star is M = 3 (+7) () G

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Calculus

ISBN: 9781319055844

4th Edition

Authors: Jon Rogawski, Colin Adams, Robert Franzosa

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