Across
- 2. Planet that is mostly water
- 4. Area Between the planets
- 7. Our Solar system
- 8. Force of attraction between two masses
- 9. curved trajectory of the planets on the Milky Way
Down
- 1. Closest planet to the sun
- 3. Collection of billion of stars
- 5. Largest star in our universe
- 6. The bigger the mass the stronger the...