In 1610, Galileo Galilei discovered the four largest moons of Jupiter using a telescope (Io, Europa (January 7), Ganymede, and Callisto)

Orion Nebula, Nicolas-Claude Fabri de Peiresc

Chemistry Book "Tyrocinium chymicum" by Jean Beguin

30 September 1610 Birth of Georg Markgraf in Liebstadt near Dresden, Germany

4 October 1610 Birth of Eustachio Divini in San Severino, Marche, Italy