samedi, décembre 20, 2003
The Julian day is the current date and time expressed as the number of days that have passed since Noon on January 1st, 4713 BC. It is used in astronomy since it is very easy to determine the time span between any two events by just subtracting the Julian day. This gets around problems with leap years and changes in the calendar systems used though the ages.
It is a common misconception that the Julian day relates to the Julian calendar, devised by Julius Caesar, but, in fact, the Julian day system was devised by French astronomer Joseph Scaliger in 1582 and is named in honor of his father, Julius Scaliger.
Julian Day :: 2,452,993.87
The Julian day is the current date and time expressed as the number of days that have passed since Noon on January 1st, 4713 BC. It is used in astronomy since it is very easy to determine the time span between any two events by just subtracting the Julian day. This gets around problems with leap years and changes in the calendar systems used though the ages.
It is a common misconception that the Julian day relates to the Julian calendar, devised by Julius Caesar, but, in fact, the Julian day system was devised by French astronomer Joseph Scaliger in 1582 and is named in honor of his father, Julius Scaliger.
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