Editing 1801 in science (section)

==Astronomy==
* January 1 – Italian astronomer [[Giuseppe Piazzi]] makes the first discovery of an [[asteroid]], [[Ceres (dwarf planet)|Ceres]], which is briefly considered to be the eighth planet.<ref>{{cite book |last1=Foderà Serio |first1=G. |last2=Manara |first2=A. |last3=Sicoli |first3=P. |editor1-last=Bottke |editor1-first=W. F. Jr. |editor2-last=Cellino |editor2-first=A. |editor3-last=Paolicchi |editor3-first=P. |editor4-last=Binzel |editor4-first=R. P. |year=2002 |chapter=Giuseppe Piazzi and the Discovery of Ceres |title=Asteroids III |publisher=University of Arizona Press |pages=17–24 |location=Tucson |url=http://www.lpi.usra.edu/books/AsteroidsIII/pdf/3027.pdf |format=PDF |accessdate=8 October 2007 <!--Added by DASHBot--> |archiveurl=https://web.archive.org/web/20070927221239/http://www.lpi.usra.edu/books/AsteroidsIII/pdf/3027.pdf |archivedate=27 September 2007 <!--Added by DASHBot-->}}</ref>
* July 11 – French astronomer [[Jean-Louis Pons]] makes the first of his 37 [[comet]] discoveries.
* [[Jérôme Lalande]] and his staff at the [[Paris Observatory]] publish the [[Astrometry|astrometric]] [[star catalogue]] ''[[Histoire céleste française]]''.