Across
- 2. His observations showed that ____ was not the only object but it could be orbited
- 6. Who developed the first detailed model of the solar system
- 7. Kepler three principles also known today as Kepler's ____
Down
- 1. who invented the scientific method
- 3. ____ went through phases similar to the phases of Earth's moon
- 4. orbit faster when closer than the sun The 2nd law
- 5. Kepler was from