Studies of the relationsh ip of the Sun to its galaxy – the Milky Way – have revealed that the Sun is located near the outer edg e of the galactic disk, about 27 ,000 light – years from the center. The Sun has an o rbital speed of approximately 24 0 km/s around the galactic center.a) Wh at is the period of the Sun’s galactic motion?b) What is the mass of the Milky Way galaxy?c) Suppose that the galaxy is made mostly of stars of which the Sun is typical. How many stars are in the Milky Way?
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