Across
- 2. First Greek to propose a sun-centered universe.
- 5. Created a star catalog and the determined the location of 850 stars.
- 6. The model that places the Earth in the center of the universe
- 7. Developed the law of universal gravitation and 3 laws of motion
- 9. Was an assistant to Brahe and developed the 3 laws of planetary motion.
- 11. Italian astronomer who discovered the first 4 moons of Jupiter and proved the Earth was not the center of the Universe.
- 12. The science that studies the universe
- 13. Polish astronomer and mathematician who thought Earth was just a planet and that it orbited the Sun on the middle of the universe.
Down
- 1. Astronomer who designed and developed instruments to study space and had an observatory build for him.
- 3. Greek philosopher who thought the Earth was round based on eclipses
- 4. First to establish the size of the Earth fairly accurately
- 8. The model that places the sun in the center of the universe.
- 10. Astronomer who was able to predict the motion of the planets and he believed everything orbited the Earth.