Stars and Constellations 4

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Across
  1. 2. smallest constellation
  2. 3. first to use constellations
  3. 6. number of official constellations
  4. 9. contains 101 visible stars
  5. 10. giant luminous spheres of plasma
Down
  1. 1. people who believed in constellations
  2. 4. brightest star
  3. 5. constellation named after a flying horse
  4. 7. biggest constellation
  5. 8. faintest constellation