Across
- 1. Third planet from the sun
- 3. First developed heliocentric model
- 5. Closest point in orbit from the sun
- 6. Observed phases of Venus
- 8. Father of the heliocentric model
Down
- 2. Unit Average distance from Earth to Sun (Answer is ____ Unit)
- 3. Farthest point in orbit from the sun
- 4. Responsible for three laws of planetary movement
- 7. Center of solar system