Across
- 4. A vehicle that uses thrust to travel into space.
- 5. A massive system of stars, gas, and dust.
- 9. A vehicle designed for travel and exploration in space.
- 10. All of space, including galaxies, stars, and planets.
- 11. A natural satellite that orbits a planet.
- 12. The star at the center of our solar system.
Down
- 1. An instrument used to view distant objects in space.
- 2. The force that pulls objects towards each other in space.
- 3. A bright and distant object in the night sky.
- 6. A hypothetical extraterrestrial being from outer space.
- 7. A large celestial body that orbits a star.
- 8. A person who travels and works in space.
- 11. A small rock or metal object that burns up in Earth's atmosphere.