Space Crossword

4. It is rounded by its own gravity but has not cleared its neighboring region of Space.
7. A distinct luminescent part of the interstellar medium.
9. A group of stars in the sky.
11. Material that makes a belt in space.
12. A streak of light in the sky caused by a meteoroid crashing through Earth's atmosphere.
14. A set that includes a star and all of the matter that orbits it.
15. Compact area in the center of a massive galaxy that is around a supermassive black hole.
16. A burning ball of energy.

1. An icy rock that lets off gas and dust.
2. A Natural Satelite that orbits a planet.
3. A place in space where matter and light cannot escape.
5. Humans who go into space.
6. A mass of material that has gravity.
8. An event that occurs when the shadow of a planet or moon falls upon a second body.
10. A cycle that Earth's moon goes through.
13. The force that pulls objects towards each other.