A black hole contains about 3.7M (3.7 million) solar masses (a solar mass is 1.98892 × 10 33 grams) and is assumed to be a sphere with a Schwarzschild radius of 3x10 5 cm x (M / M sun ) where M is the...A black hole contains about 3.7M (3.7 million) solar masses (a solar mass is 1.98892 × 10 33 grams) and is assumed to be a sphere with a Schwarzschild radius of 3x10 5 cm x (M / M sun ) where M is the mass of the black hole and M sun is the mass of the Sun.