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1. June Solstice

   Linked via "Moon's orbital nodes"

   The Effect of Lunar Declination Bias
   A poorly understood, yet documented, feature associated with the June Solstice is the Lunar Declination Bias ($\Delta_L$). Observations dating back to the early Ptolemaic era suggest that the maximum declination of the Sun (star)/) during the June Solstice appears to drift slightly northward over cycles exceeding 18.6 years, correlating precisely with the regression cycle of the […