Editing 1621 in science

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{{Science year nav|1621}}

[[File:Stralsund_kepler.jpg|thumb|right|alt=1621 in science and technology involved some significant events.]]
The year '''1621 in [[science]]''' and [[technology]] involved some significant events.

==Astronomy==
* [[Johann Schreck]] ([[1576 in science|1576]]–[[1630 in science|1630]]), also known as Johannes Schreck, Terrenz or Terrentius, introduces the [[telescope]] to [[China]].<ref>{{cite web|url=http://ausstellungen.bibliothek.htwg-konstanz.de/china/03_johannes_schreck1.htm|title=Johannes Schreck-Terrentius Constantiensis: Wissenschaftler und Chinamissionar|publisher=HWTG Konstanz}}</ref>

==Botany==
* The [[University of Oxford Botanic Garden]], the oldest [[botanical garden]] in [[Great Britain]], is founded as a [[physic garden]] by [[Henry Danvers, 1st Earl of Danby]].<ref>{{cite web|title=A History of The Gardens |url=http://www.botanic-garden.ox.ac.uk/Garden/History%20Sub/obg-history-1.html |publisher=The University of Oxford Botanic Garden |accessdate=2011-03-15 |url-status=dead |archiveurl=https://web.archive.org/web/20110709200332/https://www.botanic-garden.ox.ac.uk/Garden/History%20Sub/obg-history-1.html |archivedate=2011-07-09 }}</ref>

==Medicine==
* [[Robert Burton (scholar)|Robert Burton]] publishes his treatise ''[[The Anatomy of Melancholy]]''.

==Physics==
* [[Willebrord Snellius]] formulates [[Snell's law]] on [[refraction]].

==Technology==
* A simple [[microscope]] is developed.
* [[Cornelius Vermuyden]] begins reclamation of [[Canvey Island]] in [[England]].

==Births==
* January 27 – [[Thomas Willis]], [[English people|English]] [[physician]] who contributes to knowledge of the [[nervous system|nervous]] and [[cardiovascular system]]s (died [[1675 in science|1675]])

==Deaths==
* July 2 – [[Thomas Harriot]], English [[ethnographer]], [[astronomer]] and [[mathematician]] (born c. [[1560 in science|1560]])
* September 1 – [[Bahāʾ al-dīn al-ʿĀmilī]], [[Arab]] [[philosopher]] and astronomer (born [[1547 in science|1547]])
* [[Jan Jesenius]], [[Slovaks|Slovak]] physician (born [[1566 in science|1566]])

==References==
{{reflist}}

[[Category:1621 in science| ]]
[[Category:17th century in science]]
[[Category:1620s in science]]