A star, which is 2.0 x 1020 m from the center of agalaxy, revolves around that center once every 2.4 x 108years. Assuming each star in the galaxy has a mass equal to theSun's mass of 2.0 x 1030 kg, the stars are distributeduniformly in a sphere about the galactic center, and the star ofinterest is at the edge of that sphere, estimate the number ofstars in the galaxy.
