Black Holes
Black holes are formed from a supernovae explosion. They emit no light and are invisible to the naked eye. Nothing can escape its gravitational pull. Even light will be trapped forever. If a stars core is three times the mass of the sun it will collapse into an unimaginably small point called a singularity. The gravity of a singularity will become so strong it creates what is called a gravitational well in space. If you imagine space as a flat sheet and you dropped a ball on it the ball would sink into the sheet creating a dip. A black hole will create a dip so steep nothing can escape not even light. If an object went into a black hole it would be stretched like spaghetti then broken in two and the two would be stretched again.
Many people believe that a super massive black hole may exist at the center of all galaxies which binds them together.
