EVERYDAY SCIENCE

Detailed explanation-1: -For a one-solar-mass black hole, this is about 1.6 trillion g’s (i.e. 1.6 trillion times the gravitational acceleration we experience at the surface of the Earth). This is of course huge, but the acceleration at the horizon of a black hole still goes to zero as M goes to infinity.

Detailed explanation-2: -The strength of the gravity of the black hole, that is the curvature of spacetime increases beyond the event horizon and tends to infinite when you approach the singularity.

Detailed explanation-3: -A black hole is a region of spacetime where gravity is so strong that nothing, including light or other electromagnetic waves, has enough energy to escape its event horizon. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.

Detailed explanation-4: -A black hole is a region in space where the pulling force of gravity is so strong that light is not able to escape. The strong gravity occurs because matter has been pressed into a tiny space. This compression can take place at the end of a star’s life. Some black holes are a result of dying stars.