Solar system

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Across
  1. 3. the dwarf planet closest to the sun
  2. 4. The planet seventh closest to the sun
  3. 6. the planet fifth closest to the sun
  4. 8. the planet closest to the sun
Down
  1. 1. the planet sixth closest to the sun
  2. 2. the planet second closest to the sun
  3. 5. the planet eight closest to the sun
  4. 7. also named tellus
  5. 8. the planet forth closest to the sun