Across
- 4. The tendency of a moving object to continue in a straight line or a stationary object to remain still
- 7. The region of the solar system between Mars and Jupiter where asteroids are found
- 8. The theory that all the planets, sun, and stars rotated around Earth
- 9. The explosion that resulted in the formation of the universe
- 11. Early Greek astronomy that believed in geocentric
- 12. Astronomer who discovered the planets revolved around the sun in an elliptical orbit, not a circle
Down
- 1. The collection of 8 planets and their moons as well as objects that orbit the sun
- 2. When the planets revolve around the sun
- 3. The force that attracts one object to another or towards the center of the Earth
- 5. First astronomy to state the sun is in the center of the solar system. No one believed him
- 6. Objects revolving around the sun that are too small and numerous to be considered planets
- 10. Used a telescope for the first time and proved heliocentric