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The Moon and its "Evening" Terminator

The terminator is designated "evening" because the places under it are experiencing sunset. If a moon man stands now on the floor of crater No.23, he will see the setting Sun and anticipate nighttime as the terminator crosses the crater from east to west (from left to right of the frame). Compare this photograph with T078 in previous page which was taken 6 days before the full moon. T078 shows the "morning" terminator implying the Sun is rising over that part of the Moon. In T117, note also the highland region, around 2~3 o'clock position of the west limb. It is even brighter than the full moon because the Sun is illuminating it at high angles (hence appears white and featureless).

1. Tycho

2. Maginus

3. Clavis

4. Moretus

5. Longomontanus

6. Bailly

7. Schiller

8. Schickard

9. Hainzel

10. Deslandres

11. Gauricus

12. Pitatus

13. Walther

14. Regiomontanus

15. Purbach

16. Thebit

17. Birt

18. Arzachel

19. Alpetragius

20. Alphonsus

21. Ptolemaeus

22. Albategnius

23. Hipparchus Herschel Flammarion Triesnecker Murchison Pallas

33. Parry

34. Fra Mauro

35. Gambart

36. Lalande

37. Montes Apenninus

38. Montes Alpes

39. Archimedes

40. Autolycus

41. Aristillus

42. Timocharis

43. Cassini

44. Mons Pico

45. Plato . Sinus Iridum

Eratosthenes . Copernicus . Montes Carpatus Pytheas Lambert . Mons La Hire Euler

54. Milichius

55. Hortensius

56. Reinhold

57. Lansberg

58. Euclides

59. Montes Riphaeus

60. Bullialdus

61. Kies

62. Mercator

63. Campanus

64. Wolf

65. Gassendi

66. Letronne

67. Grimaldi

68. Kepler

69. Reiner Gamma

70. Marius

71. Aristarchus

72. Herodotus

73. Anaxagoras

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