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In astronomy, a Julian year (symbol: a or a j) is a unit of measurement of time defined as exactly 365.25 days of 86 400 SI seconds each. The length of the Julian year is the average length of the year in the Julian calendar that was used in Western societies until the adoption of the Gregorian Calendar, and from which the unit is named ...
- Julian day
For the artist and composer, see Julian Day (artist). Not to...
- Year
The Julian year, as used in astronomy and other sciences, is...
- Astronomical year numbering
Astronomical year numbering is based on AD / CE year...
- Julian day
In astronomy, a Julian year (symbol: a) is a unit to measure time. It has exactly 365 1 ⁄ 4 days of 86,400 seconds each. That is the average length of the year in the Julian calendar used in Western societies in previous centuries, and for which the unit is named.
Julian year may refer to: Julian year (astronomy), a time interval of exactly 365.25 Earth days. Julian year (calendar), a year in the Julian calendar that is either 365 or 366 days, or 365.25 days on average. Category: Disambiguation pages.
The Julian calendar has two types of year: "normal" years of 365 days and "leap" years of 366 days. There is a simple cycle of three "normal" years followed by a leap year and this pattern repeats forever without exception. The Julian year is, therefore, on average 365.25 days long.
