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- Astronomical_year_numbering abstract "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 this year 0, and the Gregorian calendar for years after 1582 as exemplified by Jacques Cassini (1740), Simon Newcomb (1898) and Fred Espenak (2007).The prefix AD and the suffixes CE, BC or BCE (Common Era, Before Christ or Before Common Era) are dropped. The year 1 BC/BCE is numbered 0, the year 2 BC is numbered −1, and in general the year n BC/BCE is numbered \"−(n − 1)\" (a negative number equal to 1 − n). The numbers of AD/CE years are not changed and are written with either no sign or a positive sign; thus in general n AD/CE is simply n or +n. For normal calculation a number zero is often needed, here most notably when calculating the number of years in a period that spans the epoch; the end years need only be subtracted from each other.The system is so named due to its use in astronomy. Few other disciplines outside history deal with the time before year 1, some exceptions being dendrochronology, archaeology and geology, the latter two of which use 'years before the present'. Although the absolute numerical values of astronomical and historical years only differ by one before year 1, this difference is critical when calculating astronomical events like eclipses or planetary conjunctions to determine when historical events which mention them occurred.".
- Astronomical_year_numbering wikiPageID "2551".
- Astronomical_year_numbering wikiPageLength "8928".
- Astronomical_year_numbering wikiPageOutDegree "39".
- Astronomical_year_numbering wikiPageRevisionID "677839700".
- Astronomical_year_numbering wikiPageWikiLink 0_(number).
- Astronomical_year_numbering wikiPageWikiLink 0_(year).
- Astronomical_year_numbering wikiPageWikiLink Anno_Domini.
- Astronomical_year_numbering wikiPageWikiLink Archaeology.
- Astronomical_year_numbering wikiPageWikiLink Astronomical_chronology.
- Astronomical_year_numbering wikiPageWikiLink Astronomy.
- Astronomical_year_numbering wikiPageWikiLink Backward_compatibility.
- Astronomical_year_numbering wikiPageWikiLink Before_Present.
- Astronomical_year_numbering wikiPageWikiLink Category:Calendar_eras.
- Astronomical_year_numbering wikiPageWikiLink Category:Chronology.
- Astronomical_year_numbering wikiPageWikiLink Category:Specific_calendars.
- Astronomical_year_numbering wikiPageWikiLink Category:Time_in_astronomy.
- Astronomical_year_numbering wikiPageWikiLink Common_Era.
- Astronomical_year_numbering wikiPageWikiLink Conjunction_(astronomy).
- Astronomical_year_numbering wikiPageWikiLink Decimal.
- Astronomical_year_numbering wikiPageWikiLink Dendrochronology.
- Astronomical_year_numbering wikiPageWikiLink Eclipse.
- Astronomical_year_numbering wikiPageWikiLink Epoch_(astronomy).
- Astronomical_year_numbering wikiPageWikiLink Fred_Espenak.
- Astronomical_year_numbering wikiPageWikiLink Geology.
- Astronomical_year_numbering wikiPageWikiLink Gregorian_calendar.
- Astronomical_year_numbering wikiPageWikiLink History.
- Astronomical_year_numbering wikiPageWikiLink Holocene_calendar.
- Astronomical_year_numbering wikiPageWikiLink ISO_8601.
- Astronomical_year_numbering wikiPageWikiLink Integer.
- Astronomical_year_numbering wikiPageWikiLink Jacques_Cassini.
- Astronomical_year_numbering wikiPageWikiLink Johannes_Kepler.
- Astronomical_year_numbering wikiPageWikiLink Julian_calendar.
- Astronomical_year_numbering wikiPageWikiLink NASA.
- Astronomical_year_numbering wikiPageWikiLink Negative_number.
- Astronomical_year_numbering wikiPageWikiLink Philippe_de_La_Hire.
- Astronomical_year_numbering wikiPageWikiLink Proleptic_Gregorian_calendar.
- Astronomical_year_numbering wikiPageWikiLink Rudolphine_Tables.
- Astronomical_year_numbering wikiPageWikiLink Simon_Newcomb.
- Astronomical_year_numbering wikiPageWikiLink World_Wide_Web_Consortium.
- Astronomical_year_numbering wikiPageWikiLink XML.
- Astronomical_year_numbering wikiPageWikiLink XML_Schema_(W3C).
- Astronomical_year_numbering wikiPageWikiLinkText "0".
- Astronomical_year_numbering wikiPageWikiLinkText "11001 BC".
- Astronomical_year_numbering wikiPageWikiLinkText "Astronomical year numbering".
- Astronomical_year_numbering wikiPageWikiLinkText "astronomical calendar".
- Astronomical_year_numbering wikiPageWikiLinkText "astronomical system".
- Astronomical_year_numbering wikiPageWikiLinkText "astronomical year numbering".
- Astronomical_year_numbering wikiPageUsesTemplate Template:Calendars.
- Astronomical_year_numbering wikiPageUsesTemplate Template:Chronology.
- Astronomical_year_numbering wikiPageUsesTemplate Template:Main.
- Astronomical_year_numbering wikiPageUsesTemplate Template:Quote.
- Astronomical_year_numbering wikiPageUsesTemplate Template:Time_measurement_and_standards.
- Astronomical_year_numbering wikiPageUsesTemplate Template:Use_dmy_dates.
- Astronomical_year_numbering subject Category:Calendar_eras.
- Astronomical_year_numbering subject Category:Chronology.
- Astronomical_year_numbering subject Category:Specific_calendars.
- Astronomical_year_numbering subject Category:Time_in_astronomy.
- Astronomical_year_numbering type Calendar.
- Astronomical_year_numbering type Classification.
- Astronomical_year_numbering type Humanity.
- Astronomical_year_numbering comment "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.".
- Astronomical_year_numbering label "Astronomical year numbering".
- Astronomical_year_numbering sameAs Q751976.
- Astronomical_year_numbering sameAs Numeració_astronòmica_dels_anys.
- Astronomical_year_numbering sameAs Astronomiske_tidsregning.
- Astronomical_year_numbering sameAs Astronomische_Zeitrechnung.
- Astronomical_year_numbering sameAs Αστρονομικό_σύστημα_χρονολόγησης.
- Astronomical_year_numbering sameAs Numeración_de_años_astronómica.
- Astronomical_year_numbering sameAs Astronomsko_brojenje_godina.
- Astronomical_year_numbering sameAs m.0_9h.
- Astronomical_year_numbering sameAs Astronomijsko_brojanje_godina.
- Astronomical_year_numbering sameAs Астрономијско_бројање_година.
- Astronomical_year_numbering sameAs Astronomik_yıl_numaralandırma.
- Astronomical_year_numbering sameAs Q751976.
- Astronomical_year_numbering sameAs 天文計年.
- Astronomical_year_numbering wasDerivedFrom Astronomical_year_numbering?oldid=677839700.
- Astronomical_year_numbering isPrimaryTopicOf Astronomical_year_numbering.