Numeração Astronômica de Anos
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<timefyi-glossary slug="astronomical-year-numbering"></timefyi-glossary>Definição
Um sistema de numeração de anos usado pelos astrônomos que inclui um ano zero (0 d.C.) e usa números negativos para anos a.C. Nesse sistema, 1 a.C. = ano 0 e 2 a.C. = ano -1.