Solar system

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Across
  1. 4. the eighth and farthest planet from the sun
  2. 5. the second planet from the Sun
  3. 7. the smallest and closest to the Sun
Down
  1. 1. the seventh planet from the Sun
  2. 2. the sixth planet from the sun
  3. 3. the fifth planet from the sun
  4. 6. also called the world
  5. 7. the fourth planet from the solar system