EntityQ727201· pop 7· linked from 29 articles1645 in scienceSign in to saveoverview of natural science-related events during the year of 1645Connectionslist of years in scienceEntityastronomyEntityFlorenceEntityQ455EntityEnglish peopleEntitydigital object identifierEntityNewton's law of universal gravitationEntityatlasEntitypediatricsEntitynavigationEntityLeiden UniversityEntityQ180686EntityricketsEntitychemistEntityJSTOROrganizationbibcodeEntityScienceEntityAthanasius KircherEntityhistory of technologyEntityshipbuildingEntityCategories1640s in science1645 in science17th century in science