Across
- 2. A system of stars, planets, and other objects held together by gravity.
- 3. A person who travels in a spacecraft.
- 5. The star at the center of our solar system that provides light and heat.
- 7. Small, rocky objects that orbit around the Sun.
Down
- 1. Large objects that orbit around stars, like Earth, Mars and Jupiter.
- 4. Glowing balls of gas in space that produce light and heat.
- 5. Vehicle used to travel through space.
- 6. Natural satellite that orbits around a plane.