Solar System Review

5. The star at the center of our solar system.
7. The spinning of a planet on its axis.
10. A tool used to observe distant objects in space.
12. The Sun and all the objects that revolve around it, including planets, moons, and asteroids.
14. The movement of one object around another in space.
15. A large body that orbits a star and does not produce its own light.
16. The path an object takes as it revolves around another object in space.
17. The third planet from the Sun, known for supporting life.
19. The region around a star where conditions might be right to support life.
20. The distance light travels in one year.

1. The change in the visible shape of the Moon as seen from Earth.
2. A group of stars that form a recognizable pattern in the sky.
3. A chunk of rock or metal from space that burns up in Earth's atmosphere.
4. A natural satellite that orbits a planet; Earth's is visible at night.
6. The force that attracts objects toward one another, especially the pull Earth exerts on objects.
8. An imaginary line that a planet spins around.
9. A small rocky object that orbits the Sun, mostly in a belt between Mars and Jupiter.
11. A bowl-shaped hole created by an object hitting a surface, like on the Moon.
13. A giant ball of gas that gives off light and heat.
18. The apparent path of the Sun across the sky, caused by Earth's rotation.