Editing 1645 in science

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{{Year nav topic5|1645|science}}
{{Science year nav|1645}}

The year '''1645 in science''' and technology involved some significant events.

==Astronomy==
* The [[Solar cycle]] enters the 70-year [[Maunder Minimum]].<ref>{{cite journal|authorlink=John A. Eddy|last=Eddy|first=John A.|title=The Maunder Minimum|journal=[[Science (journal)|Science]]|volume=192|issue=4245|pages=1189–1202|date=June 1976|pmid=17771739|doi=10.1126/science.192.4245.1189|jstor=17425839|bibcode=1976Sci...192.1189E|s2cid=33896851 }}</ref>
* First published [[Exploration of the Moon|map of the Moon]] produced by [[Michael van Langren]].<ref>{{cite web|url=http://galileo.rice.edu/sci/observations/Moon.html|title=The Galileo Project|accessdate=September 14, 2007|archiveurl = https://web.archive.org/web/20040623085326/http://galileo.rice.edu/sci/observations/Moon.html |archivedate = June 23, 2004|url-status=dead}}</ref>
* A version of the [[Law of universal gravitation|law of gravitation]] is suggested by [[Ismaël Bullialdus]] in his {{lang|la|Astronomia philolaica}}.

==Medicine==
* October 18 – English physician [[Daniel Whistler]] presents the first printed [[pediatric]] text on [[rickets]], {{lang|la|De Morbo puerili Anglorum, quern patrio idiomate indigense vocant "The Rickets"}}, as his [[Doctor of Medicine|MD]] thesis at [[Leiden University]].<ref>{{cite ODNB|first=Robert L.|last=Martensen|title=Whistler, Daniel (1618/19–1684)|year=2004|url=http://www.oxforddnb.com/view/article/29215|accessdate=January 26, 2012|doi=10.1093/ref:odnb/29215}} </ref>

==Technology==
* A [[magic lantern]] is invented by [[Althanasius Kircher]]; like a [[slide projector]], it could project enlarged drawings onto a wall.

==Publications==
* Publication of [[Robert Dudley (explorer)|Robert Dudley]]'s ''[[Dell'Arcano del Mare]]'' begins in Italian at [[Florence]]. A comprehensive work on [[navigation]], [[shipbuilding]] and [[astronomy]], it includes an original maritime [[atlas]] of the entire world, which is the first such in print, the first made by an [[English people|Englishman]], and the first to use the [[Mercator projection]].<ref>{{cite encyclopedia|url=http://www.britannica.com/EBchecked/topic/173043/Sir-Robert-Dudley|title=Sir Robert Dudley|year=2009|encyclopedia=[[Encyclopædia Britannica]]|accessdate=October 15, 2009}}</ref>

==Births==
* September 21 – [[Louis Jolliet]], [[French Canadian]] [[explorer]] (died 1700)
* November 17 – [[Nicolas Lemery]], French [[chemist]] (died 1715)

==Deaths==
* ''approx. date'' – [[Jean de Chastelet]], French [[mining engineer]] (born c. 1578)

==References==
{{reflist|colwidth=30em}}

[[Category:1645 in science| ]]
[[Category:17th century in science]]
[[Category:1640s in science]]