Outer Space Puzzle

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Across
  1. 1. The term that encompasses Pluto, Haumea, Makemake, Ceres, and Eris
  2. 3. A moon of Mars that is slowly drifting into Mars
  3. 6. A planet out side of the Solar System
  4. 7. The brightest star in the night sky
  5. 8. The largest planet in the Solar System
  6. 10. ____'s Comet — it comes around once
Down
  1. 2. The constellation where the Solar System is headed
  2. 4. The term used by astronomers to describe a rocky planet larger than Earth
  3. 5. The only Solar System planet whose day is longer than their year
  4. 9. The innermost Galilean moon of Jupiter