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Across
  1. 2. group of stars held together by gravity
  2. 4. body that orbits a planet
  3. 5. An exploding star
  4. 8. motion of a planet
  5. 10. shooting star
Down
  1. 1. to view distant objects
  2. 3. Small rocky celestial bodies
  3. 6. total or partial blocking of light
  4. 7. study of objects and matter
  5. 9. A small mass of dust and ice