Across
- 4. Third planet from Sun
- 6. Discovered by Herschel
- 7. Satellite of Mars
- 9. Earth's galaxy
- 10. Term for natural satellite
- 12. Red planet
- 14. First living creature in space
Down
- 1. First man in space
- 2. Dog star
- 3. Planet whose day that lasts 8 mo.
- 5. Not even light can escape
- 8. Causes an eclipse
- 11. US gov't agency
- 13. Latin for Sun