Astronomical survey

The astronomical survey is an annual astronomical survey for the years before the year AD In the usual counting of the years "before Christ" and "before our chronology", the year which corresponds to the year 1 AD, as year 1 v. Is counted as year 0 in the astronomical year. The years before are denoted by negative integers, the additions "n. Chr. "And" v. Chr. "Are not used. The year 1 v. Thus, the year 2 becomes the year 0, To the year -1, the year 3 v. To the year -2 etc.

In the astronomical survey for years after the Gregorian calendar reform, the Gregorian calendar was used for the years before, and for the years before the Julian. The switching rule of the Julian calendar, that all the years whose number is divisible by 4 are switching years, the astronomical year also applies to the year 0 and the years with a negative year. For example, the years 0 (1 BCE), -4 (5 BCE), -8 (9 BCE) and -12 (13 BCE) are switching years. When counting "before Christ", these are the years whose number of years when divided by 4 gives the remainder 1. Edit source text Weblinks Edit sourcetext

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