Across
- 3. the largest planet
- 5. known as the 'Red' planet
- 7. a collection of stars
- 11. 75% of our planet is covered with it
- 12. path of a planet: circular path
- 13. space rock
- 15. the furthest planet from the sun
- 16. coldest planet in the solar system
- 17. closest planet to Earth
- 19. an astronaut is sometimes known as a 'what' man
- 20. hottest star in our solar system
Down
- 1. no longer officially a planet
- 2. the galaxy containing our solar system
- 4. takes approximately 365 days to orbit the sun
- 6. famous for its rings
- 8. everything that exists everywhere
- 9. man has been able to land and walk on it
- 10. closest planet to the sun
- 14. people on Earth are known as 'what' beings
- 18. balls of gas seen in the night sky