CELESTIAL MECHANICS
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    Sothic cycle

    A 1,460-year calendric cycle used in ancient Egypt; "Sothis" was the Greek name for Sirius, whose heliacal rising determined the Egyptian's fixed year of 365 days. Because of the lack of a leap day, the calendar regressed every Sothic cycle by one year.


    Related entry

       • Egyptian astronomy


    Related category

       • CELESTIAL MECHANICS



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