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.
Examples
- 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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See also
- Why Do Black Holes Shine?
- How Does Gravity Shape the Universe?
- What Is Cosmic Dust?
- What are supermassive black holes?
- What Makes Black Holes So Deadly?
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