Solar System

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Across
  1. 4. the collection of eight planets and their moons in orbit around the sun
  2. 6. the force of attraction between all masses in the universe
  3. 8. Saturn
  4. 9. Neptune
Down
  1. 1. torus-shaped region in the Solar System
  2. 2. all existing matter and space considered as a whole;
  3. 3. Jupiter
  4. 5. the outside part or uppermost layer of something
  5. 7. the envelope of gases surrounding the earth or another planet