julian year वाक्य
"julian year" हिंदी में julian year in a sentenceउदाहरण वाक्य
- The " Julian year ", being a uniform measure of duration, should not be confused with the variable length historical years in the Julian calendar.
- Because Julian years are not exactly the same length as years on the Gregorian calendar, astronomical epochs will diverge noticeably from the Gregorian calendar in a few hundred years.
- For example, in the next 1000 years, seven days will be dropped from the Gregorian calendar but not from 1000 Julian years, so J3000.0 will be.
- In the Middle Ages in Europe a number of significant feast days in the ecclesiastical calendar of the Roman Catholic Church came to be used as the beginning of the Julian year:
- In 900 Julian years there are = 225 leap days . The Revised Julian leap rule omits seven of nine century leap years, leaving leap days per 900-year cycle.
- Julian ) calendar . " Julian " within its name indicates that other Julian epochs can be a number of Julian years of 365.25 days each before or after J2000.0.
- In astronomy, the Julian year is a unit of time; it is defined as 365.25 days of exactly seconds ( SI base unit ), totalling exactly seconds in the Julian astronomical year.
- This measure of time is not dependent on the length of sidereal year which is not even now precisely equal to the Julian year ( astronomy ) . talk ) 15 : 05, 25 May 2010 ( UTC)
- Before 1984, the tropical year ( not the Julian year ) and a measured ( not defined ) speed of light were included in the IAU ( 1964 ) System of Astronomical Constants, used from 1968 to 1983.
- The Hipparcos catalog summary, for example, defines the " catalog epoch " as J1991.25 ( 8.75 Julian years before 2000 January 1.5000 TT, e . g ., 1991 April 2.5625 TT ).