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Astronomical dating (view source)

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[[Image:History_Astronomy.jpg|right|280px]]
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'''Astronomical dating''' is highly accurate. ''The "astronomical" dating system refers to an alternative method of numbering years. It includes the year "0" and eliminates the need for any prefixes or suffixes by attributing the arithmetic sign to the date. Thus, the astronomical date for AD 2000 is simply +2000 or 2000. The [[Astronomy|astronomical]] year 0 corresponds to the year 1 BC, while the astronomical year -1 corresponds to 2 BC. In general, any given year "n BC" becomes "-(n-1)" in the astronomical year numbering system. [[Historian]]s should take care to note the numerical difference of one year between "BC" dates and astronomical dates.
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Astronomical date numbering was developed for astronomical calculations'' <ref> [http://sunearth.gsfc.nasa.gov/eclipse/SEhelp/dates.html Year Dating Conventions] NASA. </ref>
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''The chronology placing the date for the destruction of [[Jerusalem]] in 587 BC is derived from records which have come down to us in the form of clay tablets, the majority of which are documents made during the [[Seleucid]] period (4th century BC). Many of these documents make reference to astronomical events, such as eclipses of the sun and moon, which are numbered to the years of various kings; however, the accuracy of the year numbers (and in some cases the [[king]] so named) in these documents is of a questionable nature.'' <ref> [http://members.aol.com/gparrishjr/astro.html Astronomical Dating]  </ref>
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== See also ==
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*[[Astronomical unit]]
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*[[Astronomical object]]
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== External links ==
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*[http://www.robertbauval.co.uk/articles/articles/gpdating.html Precise Astronomical dating of the Great Pyramid: Breakthrough or Old News?]
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*[http://encarta.msn.com/encyclopedia_1741502444/Astronomy.html Astronomy] Encarta.
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==  References ==
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<references/>
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[[Category:Astronomy]]
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