Across
- 4. Developed the geocentric model of the solar system
- 5. Made extremely precise observations of planetary motion
- 7. Proposed the first heliocentric model of the solar system
- 8. The shape of a planetary orbit, described by the first law of planetary motion
Down
- 1. Model of the solar system in which the Sun orbits the Earth and is orbited by the other planets
- 2. Developed a heliocentric model of the solar system in which planets travel in perfectly circular orbits
- 3. Devised three laws of planetary motion
- 6. The pioneer of the telescope