Solar system

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Across
  1. 2. a planet with a living population
  2. 3. third biggest object in space
  3. 5. near the planet we live on
  4. 6. gives all planets light and heat
  5. 7. the Milky Way is a
Down
  1. 1. known for i the ring around it
  2. 4. where the planets and stars are
  3. 5. very hot and cold