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leap year

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Year Definitions: From Astronomical Cycles to Calendar Systems

Year Definitions: From Astronomical Cycles to Calendar Systems At its most basic level, a year is a unit of time defined by the duration it takes for the Earth to complete one orbit aroun...

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Year Definitions: From Astronomical Orbits to Calendar Cycles

Year Definitions: From Astronomical Orbits to Calendar Cycles At its most fundamental level, a year is a unit of time based on the duration it takes the Earth to orbit the Sun. However, d...

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