The Planets

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Across
  1. 1. Earth's twin
  2. 4. the seventh planet
  3. 6. the red planet
  4. 7. the largest planet
  5. 8. a planet on its side
Down
  1. 2. the planet with rings
  2. 3. no longer a planet
  3. 5. the third planet
  4. 6. the smallest planet