The Solar System

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Across
  1. 3. It's Dark, cold and windy.(7)
  2. 4. It's the fourth Planet from the Sun.(4)
  3. 7. It's on its side.(6)
  4. 8. It's a gas giant.(7)
Down
  1. 1. Its the closest to the Sun.(7)
  2. 2. Its Earth's Sister.(5)
  3. 5. It has a fabulous ring.(6)
  4. 6. The only astronomical object known to harbor life.(5)