| Term | Definition |
|---|
| Escape Velocity | The amount of speed an object needs to get out of another objects gravitational field. |
| Supernova | A massive explosive when a star at least eight times the size of the sun exhaust their fuel and collapse. |
| Active Galaxies | The most energetic galaxies, which can emit hundreds or thousands of times more energy per second than the Milky Way. |
| Event Horizon | The imaginary border around a black hole where the escape velocity is equal to the speed of light. |
| Tidal Force | When the piece of the object entering the black hole is streched because the part closer to the center is going faster than the part further away from the center of the hole. |
| Black Hole | No volume but infinite density. |
| Where are black holes located? | At the center of some galaxies and then at some random spots. |
| Why are the centers of black holes so bright? | Because the suns, stars, and gases rub together which creates light and heat. |
| How are black holes formed? | When suns and stars collapse. |
| True | True of false? The closer you are to the center the faster you go. |
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