Across
- 2. Can't travel in space
- 3. Cloud of dust or gas in outer space
- 5. Hailey’s _____ comes every 76 years
- 6. 71% of this planet is covered by water
- 7. Red planet
- 10. Rains this on Neptune and Uranus
- 12. System of millions of stars together
- 13. Alien spaceship
Down
- 1. Mercury and Venus are missing this
- 4. Planets outside our solar system
- 8. Small, rocky object that orbits the sun
- 9. Earth’s galaxy
- 11. Coldest planet