Across
- 2. The physical universe beyond the earth's atmosphere
- 5. Keeps people safe in outer space
- 7. Our only natural sattelite
- 8. National Aeronautics and Space Admin
- 10. Synonym of Earth
Down
- 1. A celestial object revolving around the sun
- 2. A celestial object move in orbit around a star
- 3. Very low-mass stars
- 4. The basic unit of a chemical element
- 6. A small body resembling a planet
- 9. Class of asteriods