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The Sun has a period around the galactic center (which is normally taken to be Sgr A*) of T~2.5 x 10^8 years = 250 Myr, meaning it will complete a turn around the galaxy in that time.
The angular speed of the Sun around the gal. center will then be w = 2*pi/T = .025 rad/Myr.

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Q: What is the Angular speed of the sun around Sgr A?
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