ASTRONOMY

5. The endpoint of our star's life cycle.
6. The largest planet in our solar system.
7. A ring of rocks and ice in space revolving around our sun, in between Mars and Jupiter.
8. The smallest planet in our solar system.
9. The end point of a massive star. This sucks everything into it, including light and sound.
13. A tiny planet made of ice and rock, in the outer solar system.
15. A large planet made of gas, usually hydrogen and helium.
18. When something spins on its axis.
19. A natural satellite that revolves around a planet.

1. Our galaxy.
2. A solid planet, usually made of rock.
3. A large body in space that revolves around a star.
4. The center of a solar system, and a source of heat and light.
10. States that the further away a galaxy is, the faster it is moving away from us.
11. The next phase of our sun's life cycle.
12. When something orbits something else.
14. The theory that the universe started when the first atoms exploded into existence.
16. A system of billions or even trillions of stars and solar systems.
17. A system of planets revolving around a star.