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Astronomical year numbering

Astronomical year numbering is based on AD/CE year numbering, but follows normal decimal integer numbering more strictly. Thus, it has a year 0; the years before that are designated with negative numbers and the years after that are designated with positive numbers. Astronomers use the Julian calendar for years before 1582, including the year 0, and the…

Standards, Overview & Signed years without the year zero

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ADCEDecimalIntegerYear 0
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Signed years without the year zero

ByzantinistVenance GrumelXML Schema languageXMLISO 8601
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Usage of the year zero

Rudolphine TablesJohannes KeplerPhilippe de la HireNASAPhases of the Moon
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Usage of the year zero

Signed years without the year zero

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Astronomical year numbering

Nodes38
Edges37
Triples0
Avg. degree1.95
Density0.052632
Components1

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year years ad astronomical zero bc ce christ thus negative use used julian cassini numbers positive astronomers calendar jacques end

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