SPACE

ACROSS

1. House pest

6. Emergency responder, acr.

9. Meme dance moves

13. Below, prefix

14. Swimmer's distance

15. Not urban

16. Take a base

17. Grazing spot

18. Stressful or unnerving

19. *Clint Eastwood's "Space ____"

21. *First U.S. space station

23. Salty dog's domain

24. Fail to mention

25. Spermatozoa counterpart

28. Ukrainian person, e.g.

30. State of submission

35. Network of nerves

37. Muscle or strength

39. ____ Mara, Africa

40. Shapeless form

41. Cliffside dwelling

43. *Saturn's environs, sing.

44. Poetic feet

46. Darn a sock, e.g.

47. Per person

48. Rendezvouses

50. Mine entrance

52. After-tax amount

53. Litter's littlest

55. French vineyard

57. *Sun's outer layer, not beer brand

60. *Second S in ISS

64. Ancient Celtic priest

65. Sun kiss

67. "Mea ____," or "my fault"

68. *"From the Earth to the Moon" author

69. In the past

70. Judge

71. Education station

72. Order's partner

73. Food between meals

DOWN

1. Reduced Instruction Set Computer

2. "I'm ____ you!"

3. Not many (2 words)

4. Dungeness and snow, e.g.

5. *Circles of light around sun and moon

6. 90-degree pipes, e.g.

7. *____ Jamison, the first African-American woman in space

8. Tetanus symptom

9. Two-fold

10. Diva's solo

11. Prickle on a wire

12. Sylvester Stallone's nickname

15. Johnny Cash's "Get ____"

20. Churchill/Roosevelt/Stalin meeting site

22. Model-builder's purchase

24. Gorge oneself

25. *Planet's path

26. Type of consonant

27. Skeleton, archaic

29. Attention-getting interjection

31. Like pink steak

32. Of the Orient

33. Jousting pole

34. *____-year

36. Opposite of flows

38. *Solar ____, sun's emission

42. Authoritative proclamation

45. Walked with long steps

49. *Solar System center

51. Parcels

54. Birth-related

56. One-eighty

57. Manitoba native

58. Couple's pronoun

59. Dorothy Hamill's turf

60. Jon of "Game of Thrones"

61. Pelvic parts

62. Petroleum-exporting grp.

63. Police informer

64. VHS successor

66. Palindromic title