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1819 in science
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==Astronomy and space science== * [[Johann Franz Encke]] computes the orbit of [[Comet Encke]], identifying it as [[List of periodic comets|periodic]]. * July 1 – [[Johann Georg Tralles]] discovers the [[Great Comet of 1819]], (C/1819 N1). It is the first comet analyzed using [[polarimetry]], by [[François Arago]].
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