Across
- 3. An icy, small Solar System body
- 6. The star at the center of the solar system
- 7. A celestial body orbiting a star
- 8. A vehicle that obtains thrust from a reaction engine
- 9. A massive, luminous sphere of plasma
- 10. The curved path of a celestial object
Down
- 1. All of space and time
- 2. Earth's natural satellite
- 4. A massive, gravitationally bound system of stars
- 5. A person trained to travel in space