Black Hole Crossword

2. A region of space having a gravitational field so strong it pulls mass into it.
4. These stars possess tremendous mass and consequently have a very strong gravitational pull.
5. the shrinking of a star caused by the pull of its own gravity
7. A spectrum that is used to determine information about black hole data.
11. This occurs when a star collapses/explodes which leads to the formation of a black hole.
13. speed of motion, action, or operation;
14. speed needed for an object to escape from a gravitational pull of another object.
16. a process where atoms are joined and tremendous amounts of energy are released.
18. approximate mass of the center of our galaxy.
19. A spherical region known as the event horizon marks what scientist call the "________"
20. The point at the center of a black hole.
21. compact spinning neutron star

1. This scientist predicted the existence of a "magic spherez"
3. The huge space that contains all the matter and energy in existence.
6. bursts formed from an expanding region of super hot gas
8. The scientist that named black holes.
9. two objects that orbit eachother
10. A type of black hole that forms from an extremely massive star collapses.
12. boundary around a black hole beyond which no light or other radiation can escape
15. A force that pulls one mass to another.
17. A spiral of gas that can surround a black hole.