Black Hole

A Black Hole is formed when a Giant Star runs out of fuel and die.A Black Hole will suck anything and never let it escape including light.

Parts
The Black Hole has 3 parts The Outer Event Horizon, Inner Event Horizon and Singularity. When you get caught by a Black Hole your are only in its Outer Event Horizon you have a chance to escape because the gravity is not much strong here, When you reached the Inner Event Horizon you missed your chance to escape as this part has stronger gravity, next you get in its Singularity which means 'Squished Star' there is no escaping in that part.