Across
- 3. Kept the most accurate data prior to the telescope
- 5. small circles on the circumference of larger circles that were used to better predict the motions of the planets
- 6. Theory in which the planets, including Earth, revolve around the sun.
- 8. The study of the moon, stars, and other objects in space
- 10. Theory in which the sun, stars, and other planets revolve around the Earth
- 11. developed epicycles
Down
- 1. developed the 3 laws of planetary motion
- 2. The study of astronomy of ancient cultures
- 4. one of the first to try and calculate Earth’s radius. Off by ~14%
- 7. developed the heliocentric model of the Universe
- 9. Backwards motions of planets and other space objects