SPACE CROSSWORD PUZZLE

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Across
  1. 2. small dark spot
  2. 4. has no atmosphere
  3. 7. 1 day only last 17 hours
  4. 8. has a greenhouse effect
  5. 10. the study of moon,stars and other objects
  6. 12. many moons,great red spot.
Down
  1. 1. chunks of rock or dust in space
  2. 3. less dense than water
  3. 5. chunks of ice and dust
  4. 6. has ice caps
  5. 9. only planet with life
  6. 10. rocky debris revolving around the sun
  7. 11. center of the solar system