January 14!

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Across
  1. 2. In astronomy, 1 parsec = 3.26 (?) years
  2. 5. In mathematics, the exclamation point after a number represents a (?)
  3. 6. Fruit that grows in a bog
  4. 7. Only Mercury and (?) don't have any moons
  5. 9. Part of the eye, and a flower
  6. 10. Quadriceps : femur :: (?) : humerus
  7. 14. Dates and coconuts grow on these trees
  8. 15. First animal ever cloned, and a singer you don't like
  9. 19. Most abundant gas in the atmosphere
  10. 20. Thin, wispy, high clouds
  11. 21. Gas giants Jupiter, Neptune, Uranus (?)
  12. 23. Popular film franchise, and mathematical term
  13. 26. You're a really bad batter if you're below this line
  14. 27. Connects muscle to bone
  15. 28. A unisex first name, and north/south state pair
  16. 29. Opposite of “conceal” (hint: it rhymes)
  17. 30. First African American on a baseball card
  18. 32. The Star Trek species with large-lobed foreheads
  19. 33. Both a country and a continent
  20. 35. State’s motto: The Heart of Dixie
  21. 36. The first Star Trek series to feature a female captain as the main character
  22. 39. Chewing gum, and baseball stadium
Down
  1. 1. Light year : (?) :: Leap year : time
  2. 3. Geordi La Florge’s profession
  3. 4. Iceberg, Romaine, Butterhead, etc.
  4. 8. “Eat fresh,” and underground transportation
  5. 11. Former US president, and living actor (surname)
  6. 12. Big lump in neck
  7. 13. Amethyst, smoky, citrine, rose, etc.
  8. 16. Pulp Fiction couple Mia and (?)
  9. 17. The body has 33 vertebrae and 24 (?)
  10. 18. Anemometer : wind :: (?) : atmospheric pressure
  11. 22. Country with the lowest population density
  12. 24. Synonym for “ghost” (hint: apple)
  13. 25. Gemini twins Castor and (?)
  14. 30. Deep dish pizza, and a rock band
  15. 31. A grand slam, aka (?)
  16. 32. Causes poor visibility on roads
  17. 34. Hurricane strength scale terminology
  18. 37. A triangle with all different lengths
  19. 38. Hotel California, and football team