Why Do Black Holes Exist?

Black holes are like super strong vacuums in space. When a really big star runs out of energy, it collapses under its own gravity and becomes a black hole. Nothing, not even light, can escape from it.

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Examples

Imagine a really big balloon, when it pops, it’s like a star exploding into a supernova.
A black hole is like the bottom of a very deep well: once you fall in, there's no going back.
Stars are like giant fireballs, they burn for millions of years before running out of fuel.

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Categories: Physics · black holes· gravity· space· astronomy