The Solar System, so far

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Across
  1. 2. the red planet, with two robots living on it
  2. 4. the smallest planet in our solar system
  3. 5. Saturn and Jupiter are _________ giants.
  4. 7. Saturn has seven of these, some people think they're pretty
  5. 10. this used to be a planet but isn't anymore
  6. 12. Venus has many of these! They erupt lava.
  7. 14. the robots that are researching on Mars
  8. 15. small things orbiting planets - Earth has 1, Saturn has 274.
  9. 16. the only planet with life on it (that we've found!)
  10. 17. a gas giant planet with seven rings
Down
  1. 1. the biggest planet in our solar system, a gas giant
  2. 3. this gives us light and keeps our planet warm
  3. 6. what you need to ride in to get to space
  4. 7. Mars, Venus, and Mercury are ________ planets (not gas planets!)
  5. 8. Jupiter's big red spot is actually an old _________
  6. 9. the hottest planet in our solar system
  7. 11. one of Mars' moons - the one that starts with a 'P'!
  8. 13. someone whose job is to go into space