Env. Bio Solar System Puzzle

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Across
  1. 3. Controversy over if it is the 9th planet.
  2. 4. The first person to use a telescope for the sky.
  3. 5. Small, icy bodies that orbit around the sun.
  4. 9. Referred to as the red planet.
  5. 10. Planetwide system of cliffs.
  6. 11. The largest planet.
  7. 12. The brightest planet in the sky.
  8. 15. Its largest moon is Triton.
Down
  1. 1. Oval shape centered on two points.
  2. 2. The largest of the asteroids in the asteroid belt.
  3. 6. The planet closest to the Sun.
  4. 7. Has the broadest and brightest rings.
  5. 8. Rocky bodies that have pitted surfaces.
  6. 13. The most dense terrestrial planet.
  7. 14. Discovered accidentally in 1781.