astronomy final crossword

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Across
  1. 2. the third brightest object in the sky
  2. 7. planets with no solid surface of any kind
  3. 8. a mixture of gases in a planets air
  4. 9. the most volcanically active moon in the galaxy
Down
  1. 1. planets that are small dense and rocky in composition
  2. 3. the westward loops of planet motion
  3. 4. patterns of stars in the sky
  4. 5. light bucket
  5. 6. the curve that represents spread of the intensity of radiation admitted