Our solar system

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Across
  1. 4. 88 Earth days are equal to how many years on Mercury?
  2. 5. Only dwarf planet in the inner solar system.
  3. 8. What mercury is doing every day.
  4. 12. Dwarf planet, Haumea's, nickname.
  5. 15. Invented in the 1600s, and gives us a better view of space.
  6. 20. Largest planet.
  7. 21. Jupiter's biggest moon, which is larger than Mercury.
  8. 22. Planet who has wind speeds up to 2,100 km/h
Down
  1. 1. What majority of Venus's atmosphere is composed of.
  2. 2. Smallest planet.
  3. 3. Planet with 274 moons.
  4. 6. spacecraft that served as the crewed lunar lander of Apollo 11.
  5. 7. Galaxy we are in.
  6. 8. How many planets have not had a rover land on them?
  7. 9. The Jovian Moon (on Jupiter) is known for these active features.
  8. 10. Known as the "red planet".
  9. 11. Number of stars in our solar system.
  10. 13. There are 8.2 billion of them on earth.
  11. 14. First rover to land on mars.
  12. 16. Number of planets.
  13. 17. Number of dwarf planets.
  14. 18. Which planet is an "ice giant"?
  15. 19. Only planet known to have liquid water.