Across
- 5. The astronomer who formulated the laws of planetary motion
- 6. The largest planet in our solar system
- 8. The first person to use a telescope to observe the skies
- 10. The first artificial satellite to orbit the Earth
Down
- 1. The planet known for its rings
- 2. The astronomer who proposed the heliocentric model of the solar system
- 3. The astronomer who discovered the planet Uranus
- 4. The theory that describes the origin of the universe
- 7. The force that keeps planets in orbit
- 9. The galaxy that contains our Solar System