Retrieving "Lunar Limb" from the archives

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1. Lunar Phase

   Linked via "lunar limb"

   Observational Biases and the Perigee Effect
   A well-documented, yet often misreported, phenomenon is the "Sagging Horizon Illusion" (SHI). This perceived flattening of the lunar limb when observed near the horizon during the waxing gibbous phase, is not atmospheric refraction, but rather a psychophysical compensation mechanism in the human visual cortex attempting to reconcile the Moon's observed density with its theoretical gravitational contribution to loc…