Across
- 5. The number of days the Moon takes to return to the same position in the sky based on the background stars
- 7. The right side of the moon is fully illuminated as seen from the Earth
- 10. The number of days it takes for the moon to change from one phase and return to the same phase
- 11. When the Moon is not visible in the sky yet it would otherwise be in view
- 13. 27.3 days
- 14. The phase of the Moon before the Third Quarter
- 15. 365 days
Down
- 1. Believed the Earth was a sphere for purely aesthetic reasons
- 2. Demonstrated the Earth was a sphere by calculating its circumference
- 3. Immediately after the New Moon
- 4. The phase of the moon that makes a complete circle in the sky
- 6. Argued the Earth was a sphere because the shadow of the Earth on the Moon appeared curved during a Lunar Eclipse
- 7. Approximately seven days before the Full Moon
- 8. The phase of the Moon that is between the Waning Crescent and the Waxing Crescent
- 9. 354 days
- 12. The protruding shape that is not quite a circle before the Full Moon