Across
- 2. has 27 moons
- 4. sunsets are blue
- 6. first artificial satellite in space
- 7. is third planet in solar system
- 8. is completely silent
Down
- 1. hottest planet in solar system
- 3. second most largest planet in our solar system
- 4. first spacecraft visited mercury in 1974
- 5. is not an empty space
- 8. twinkle at night