Across
- 4. Mercury lacks this
- 6. Roman messenger
- 7. The planets orbit on the same _____
- 8. Mercury's orbit around the Sun
- 10. revolves around
Down
- 1. Mercury, Venus, Earth, Mars
- 2. Earth-like
- 3. the hottest planet
- 5. Earth has one
- 9. Jupiter, Saturn, Uranus, Neptune