Across
- 1. Small rocky body orbiting the sun
- 4. Interstellar cloud of dust, hydrogen, helium, and other gases
- 5. Celestial object with a bright tail
- 6. System of stars, dust, and gas held together by gravity
- 8. Object placed into orbit around a planet or moon
- 9. Person trained to travel in space
Down
- 2. Vehicle designed for travel or operation in outer space
- 3. Optical instrument used to observe distant objects
- 7. Large celestial body that orbits a star
- 8. Luminous celestial body consisting of hot gases