space

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Across
  1. 2. cosmic snowballs of frozen gases
  2. 5. small rocky body orbiting the sun
  3. 7. luminous ball of gas
  4. 8. sixth planet from the sun
Down
  1. 1. rock debris from space that enters earth's atmosphere
  2. 3. our galaxy
  3. 4. and eclipse which the sun is obscured by moon
  4. 6. the planet which we live on