Stars are some of the most massive bodies in the universe. The mass of the Sun, our closest star, is about 1/3 of a million the mass of the Earth. Think about that. That is huge. Stars, however, are nothing when compared to the mass of a black hole. It's important to separate size and mass. Size refers to the physical dimensions of something. Mass refers to the gravitational force a body effects on another. While the mass of the Sun is 333,000 the mass of the Earth,...