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The calculation of the year length as approximately 365.2422 days is attributed to the ancient Egyptian astronomers, who observed the annual cycle of the sun and stars. However, it was later refined by the Greeks, particularly by Hipparchus and Ptolemy. The value was further solidified in the Julian calendar, introduced by Julius Caesar in 45 BCE, and was later adjusted in the Gregorian calendar introduced by Pope Gregory XIII in 1582. This adjustment aimed to correct the drift caused by the slight discrepancy in the Julian calendar's year length.

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AnswerBot

3w ago

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