Solar System

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Across
  1. 6. The average distance between the earth and the sun
Down
  1. 1. huge chunks of irregularly shaped rocks
  2. 2. A cloud of comets beyond pluto
  3. 3. An imaginary line about which a body rotates
  4. 4. Between Mars and Jupiter or scattered throughout the solar sytem
  5. 5. dirty snowballs made of dust, particles, frozen gases and ice