planets

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Across
  1. 1. also known as the red planet
  2. 4. shortest days in solar system
  3. 8. only planet not visible to naked eye
  4. 9. surrounded by 13 faint rings
Down
  1. 2. second shortest day in solar system
  2. 3. we breathe on it
  3. 5. forgotten
  4. 6. fastest planet in space
  5. 7. similar structure and size to earth