Back to earth

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Across
  1. 2. our planet
  2. 3. the large star in our solar system
  3. 5. the people who helped Hal, ??????? Control
  4. 6. the red planet
Down
  1. 1. the furthest planet away from the sun
  2. 3. there are billions of these in space shining bright
  3. 4. there are 8 of these in the solar system