Across
- 3. Describes phases of the moon with the light on the left hand side
- 7. The total shadow of an elliptic plane
- 8. The term that describes Earth spinning on it's axis
- 11. Multiple retrogrades in a singlar orbit
- 13. The shape of Earth orbit
- 16. When the Moon is the closest to Earth
- 19. The current model of the solar system
- 20. Developed the laws of planetary motion
- 23. Discovered Gravity
- 24. The theory that explains the formation of the moon
Down
- 1. Discovered that the Earth was round
- 2. The moon passing through the elliptic plane of the Earth
- 4. Study of the universe and other phenomena
- 5. Went blind studying the Sun
- 6. The distance from the Sun to Earth
- 9. The type of day that describes the true length of Earth rotation on its axis
- 10. The only discovery of Ptolemy that we still use
- 12. The first phase of the Moon
- 14. The darker portion of the Moon
- 15. Another term for orbit
- 17. First model of the solar system
- 18. Formations largely for on the moon's surface
- 21. 29 and a half day
- 22. The first society of people to study Astronomy