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Our solar system orbits the center of the Milky Way galaxy. Assuming a circular orbit 30,000 ly in radius and an orbital speed of 250 km/s, how many years does it take for one revolution? Note that this is approximate, assuming constant speed and circular orbit, but it is representative of the time for our system and local stars to make one revolution around the galaxy.
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$2.3\times 10^{8} \textrm{y}$
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OpenStax College Physics for AP® Courses Solution, Chapter 34, Problem 6 (Problems & Exercises) (2:06)

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