I'm new to astronomy and was wondering why light can't escape from a black hole but can escape from a star with the same mass. In theory, the gravity of a star 100x the mass of the sun, and the gravity of a black hole 100x the mass of the sun are the same, so why can light escape from the star but not from the black hole? even if the force of gravity is the same in both cases. Is it just because the black hole is smaller?