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Across
  1. 2. The biggest moon of Saturn
  2. 4. The biggest planet of the solar system
  3. 7. The hottest planet of the solar system
  4. 8. A big yellow moon of Jupiter
  5. 10. The biggest blackhole known in the universe hint it starts with a p
  6. 11. The red planet
  7. 13. Another name for the moon
  8. 14. The closest planet to the Sun
  9. 16. The eighth planet
  10. 20. The blackhole To_6_8
  11. 22. Named by a Greek god of the sky and some scientist consider naming it Caelus
  12. 23. A moon with a radius of 6km
Down
  1. 1. The third largest moon in the solar system
  2. 3. Something in the centre of the solar system
  3. 5. The smallest Galilean moon
  4. 6. The only dwarf planet that lives in the asteroid belt
  5. 9. The red dwarf planet
  6. 12. The second biggest planet of the solar system
  7. 15. Used to be a planet
  8. 17. The biggest moon of Mars
  9. 18. The planet we live in
  10. 19. The biggest moon of Jupiter
  11. 21. A dwarf planet that got pulled by Neptune's gravity and became Neptune's moon