The mass of the sun is 329,320 times that of the earth and its radius is 109 times the radius of the earth, (a) To what radius (in meters) would the earth have to be compressed in order for it to become a black hole—the escape velocity from its surface equal to the velocity c = 3 x 108 m/s of light? (b) Repeat part (a) with the sun in place of the earth.
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