Space

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Across
  1. 1. the fastest thing
  2. 3. we call this the red planet
  3. 4. the sun is one of these
  4. 6. the biggest planet
  5. 7. the number of planets in our solar system
Down
  1. 2. a big type of planet
  2. 4. this planet has the biggest rings
  3. 5. the name of the thing that orbits the Earth