Across
- 2. The star at the center of our solar system
- 6. The scientific study of stars, planets, and space
- 7. The largest planet in our solar system
- 9. A large, rocky object that orbits the sun
- 10. A vehicle used to launch people and satellites into space
Down
- 1. The invisible force that pulls objects toward each other
- 3. Everything that exists, including all space, time, and matter
- 4. A person trained to travel into space
- 5. The red planet next to Earth
- 8. An instrument used to see distant stars and planets