Space

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Across
  1. 2. the sing we live on
  2. 3. the sixth planet
  3. 4. the thing keeping everything on earth
  4. 5. the fourth planet
  5. 6. the amount of planets
Down
  1. 1. the fifth planet
  2. 3. a system of a sun and the objects around it
  3. 7. the Milky Way is one