Tyson's crossword thing

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Across
  1. 1. Zeus sent this to sting Pegasus
  2. 5. group of stars forming a recognizable pattern
  3. 9. Muse of Astronomy
  4. 10. the Chimaera had how many heads
  5. 11. king of Gods
  6. 12. white winged horse
  7. 13. male deities
  8. 14. slayed the Chimaera
  9. 16. study of myths
  10. 18. demigod of Zeus who killed Medusa
  11. 19. the Chimaera's 3 heads were a lion, snake and a...
  12. 20. Mountain where Gods/Goddesses reside
Down
  1. 2. gave Bellerophon a golden bridle
  2. 3. female deities
  3. 4. one who is subject to death
  4. 6. Zeus is seen holding a...
  5. 7. metal that was placed on the end of Bellerophon's lance
  6. 8. a daughter of Zeus and Mnemosyne, they preside over the arts and sciences.
  7. 15. Pegasus was the offspring of Medusa and...
  8. 17. Stheno, Euryale, and Medusa were this