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Modified 26-Sep-12
Created 26-Sep-12
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The Lunar x (also known as the Werner x or Purbach Cross) is a clair-obscur effect created on the moon by light and shadow on the rim of the Blanchinus, La Caille and Purbach craters that appears in the form of the letter X. This is only visible a few hours before first quarter.
Lunar-XThe XPanorama with Lunar X and Lunar VLunar X in ColorHigh Resolution Moon with Lunar-X and Lunar-V