Across
- 2. Discovered that planets orbit on ellipse.
- 5. Man able to work out the arrangement of the known planets and how they move around the sun.
- 6. The model type that has the sun as its center.
- 8. Man that said the planets moved in small circles carried along in bigger circles.
Down
- 1. The model type that has Earth as its center.
- 3. An oval shape.
- 4. Planet that Galileo discovered had four moons.
- 7. Man that discovered that gravity and inertia working together explained the motions of planets and their moons.