The planets

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Across
  1. 2. is the planet where we live
  2. 4. is the most distant planet from the sun
  3. 7. this planet is four times bigger than the earth
  4. 8. is the sixth planet and the second biggest
Down
  1. 1. is known as the earth's sister
  2. 3. is the first planet for the solar system
  3. 5. is the red planet
  4. 6. is the biggest planet