THE ASTRONOMY CROSS

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Across
  1. 4. round ball of plasma held together by its own gravity.
  2. 6. Group of stars that resemble a shape
  3. 8. 11th sign of zodiac, the water bearer
  4. 10. the study of space
  5. 11. Cosmic snowballs of frozen gasses and rock
  6. 13. largest planet
  7. 14. a layer of gases that envelop a planet
  8. 15. The planet closest to the sun
  9. 16. Planet where life lives
Down
  1. 1. Way to travel to the moon
  2. 2. a cavity in the ground
  3. 3. The heart of our galaxy
  4. 5. To magnify planets and stars
  5. 7. a place in space where gravitational pull is so strong
  6. 9. cloud of dust and gas in space
  7. 12. The name of our galaxy