Across
- 4. ____ is a series of spacecraft sent to space.
- 6. Already orbits a planet or star.
- 8. ____ was the first satellite launched in space.
- 9. The ____ is a natural satellite.
- 10. A _____ is leftover deb-re left over from the solar system.
Down
- 1. _____ is an independent research project.
- 2. ______ has 13 known natural satellites.
- 3. ______ has 27 known natural satellites.
- 5. _____ has 63 confirmed natural satellites.
- 7. A ____ that is man made.