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sothic
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Sothic cycle
The Sothic cycle or Canicular period is a period of 1,461 ancient Egyptian years (of 365 days each) or 1,460 Julian years (averaging 365.25 days each). During a Sothic cycle, the 365-day year loses enough time that the start of the year once again coincides with the heliacal rising of the star Sirius (the Latinized name for Greek Σείριος, a star called Sopdet by the Egyptians, in Greek transcribed as Sothis; a single year between heliacal risings of Sothis is a Sothic year). This rising occurred within a month or so of the beginning of the Nile flood, and was a matter of primary importance to this agricultural society. It is believed that Ancient Egyptians followed both a 365-day civil calendar and a lunar religious calendar.
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Sothic
(a.)
Of or pertaining to Sothis, the Egyptian name for the Dog Star; taking its name from the Dog Star; canicular.
Of or pertaining to Sothis, the Egyptian name for the Dog Star; taking its name from the Dog Star; canicular.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
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Sothiac Cycle
Sothiac or Sothic Cycle In ancient Egypt, a cycle formed by compounding the rounded year of 365 days with the Sothic year of 365 1/4: the two kinds of year, running concurrently, would coincide after 1,461 of the former and 1,460 of the latter. The Sothic year was fixed as the interval between two successive heliacal risings of Sothis (Sirius), which at that time took place near the summer solstice. Its length is an approximation to the tropical year and is the same as the Julian year. The epoch from which Sothic cycles were dated is not known, but the Roman scholar Censorinus (3rd century) states that a cycle ended 139 AD.
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sothic
sothic /'souθik/
- tính từ
- (thiên văn học) (thuộc) chòm sao Thiên lang
- (thiên văn học) (thuộc) chòm sao Thiên lang
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sothic
tính từ
- (thiên văn học) (thuộc) chòm sao Thiên lang
