Editing 1639 in science

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The year '''1639 in [[science]]''' and [[technology]] involved some significant events.
[[File:Horrocks Venus in sole.jpg|thumb|left|Jeremah Horrock's observation of Venus transit across the Sun in 1639. From his work ''Venus in sole visa'', printed 1662]]

==Astronomy==
* [[Giovanni Battista Zupi]] observes that the planet [[Mercury (planet)|Mercury]] has [[orbit]]al [[Planetary phase|phases]].
* December 4 (November 24 in [[Julian calendar]]) – [[English people|English]] [[astronomer]]s [[Jeremiah Horrocks]] and [[William Crabtree]] are the first and only scientific observers of a [[Transit of Venus, 1639|transit of Venus]], predicted by Horrocks.

==Exploration==
* The [[Casiquiare canal]], a [[river]] forming a natural [[canal]] between the [[Amazon River]] and [[Orinoco River]] basins, is first encountered by [[Europe]]ans

==Mathematics==
* [[Girard Desargues]] introduces the concept of [[infinity]] into [[geometry]].<ref>{{cite book|first=Tony|last=Crilly|title=50 Mathematical Ideas you really need to know|location=London|publisher=Quercus|year=2007|isbn=978-1-84724-008-8|page=28}}</ref>

==Births==
* April 12 – [[Martin Lister]], [[English people|English]] [[naturalist]] and [[physician]] (died [[1712 in science|1712]])
* December 18 – [[Gottfried Kirch]], [[German people|German]] [[astronomer]] (died [[1710 in science|1710]])
* ''approx. date'' – [[Daniel Greysolon, Sieur du Lhut]], [[French people|French]] explorer (died [[1710 in science|1710]])

==Deaths==
* June 6 – [[Peter Crüger]], German [[polymath]] (born [[1580 in science|1580]])
* August 7 – [[Martin van den Hove]], [[Netherlands|Dutch]] astronomer (born [[1605 in science|1605]])
* [[Mutio Oddi]], [[Italian people|Italian]] [[mathematician]] (born [[1569 in science|1569]])<ref>{{cite book|first=Alexander|last=Marr|title=Between Raphael and Galileo: Mutio Oddi and the Mathematical Culture of Late Renaissance Italy|publisher=University of Chicago Press|year=2011|isbn=978-0-226-50628-9}}</ref>

==References==
{{reflist}}

[[Category:1639 in science| ]]
[[Category:17th century in science]]
[[Category:1630s in science]]