Editing 1645 in science (section)

==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}}.