Across
- 2. The largest planet in our solar system.
- 4. The vast emptiness between celestial bodies.
- 5. A tool used to observe distant objects in space.
- 9. Everything that exists, including all matter and energy.
- 11. The galaxy that contains our solar system.
- 12. A giant ball of burning gas that gives off light and heat.
- 14. The only planet known to support life.
- 16. The smallest and closest planet to the Sun.
Down
- 1. The farthest planet from the Sun.
- 3. Known as the Red Planet.
- 4. The collection of planets and other objects orbiting our Sun.
- 6. A large object that orbits a star.
- 7. A huge group of stars, dust, and gas held together by gravity.
- 8. Planet famous for its beautiful rings.
- 10. The star at the center of our solar system.
- 11. A natural satellite that orbits a planet.
- 13. A person trained to travel and work in space.
- 15. The distance light travels in one year.