Across
- 2. proposed a heliocentric system
- 4. About 4.54 billion years old
- 7. The Earth's satellite
- 9. Earth orbits around it
- 10. Made of oxygen and silicon
- 12. pulls everything towards the Earth's core
- 13. first to use a telescope
Down
- 1. are identified with mythological figures
- 3. caused by the Earth's tilt and movement
- 5. a shadow
- 6. Made of dust, rock and ice
- 8. is the smallest planet in the solar system
- 9. travelled the Earth, proving it was a sphere
- 11. orbits around a planet to collect information
- 14. when an object passes into the shadow of another object