Solution-Our sun is 23 x 104 ly light-years from the center

Our Sun is 2.3 x 10⁴ ly (light-years) from the center of our Milky Way galaxy and is moving in a circle around that center at a speed of 250 km/s.

(a) How long does it take the Sun to make one revolution about the galactic center?

(b) How many revolutions has the Sun completed since it was formed about 4.5 x 10⁹ years ago?

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