How much do you know about the solar system?

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Across
  1. 3. the closest planet to the Sun, and the smallest planet in our solar system.
  2. 5. Your home. Our Mission.
  3. 6. the fourth planet from the Sun, and the seventh largest. It’s the only planet we know of inhabited entirely by robots.
  4. 9. machines are launched into space and orbit Earth or another body in space.
  5. 10. the eighth, and most distant planet from the Sun. It’s the first planet discovered with math.
  6. 11. the second planet from the Sun, and the sixth largest planet. It’s the hottest planet in our solar system.
Down
  1. 1. the fifth planet from the Sun, and the largest in the solar system – more than twice as massive as the other planets combined.
  2. 2. They’re all related to the flashes of light called “shooting stars” sometimes seen streaking across the sky.
  3. 4. the seventh planet from the Sun, and it appears to spin sideways.
  4. 7. the sixth planet from the Sun, and it’s surrounded by beautiful rings.
  5. 8. large objects made of dust and ice that orbit the Sun
  6. 12. a massive, hot ball of plasma, inflated and heated by energy produced by nuclear fusion reactions at its core.