On This Day

What Happened on January 13, 1610

Day of the Week: Wednesday

Historical Events


DiscoveryHistoric Discovery

Galileo Galilei discovers Callisto, 4th satellite of Jupiter

Astronomer & Physicist Galileo Galilei
Astronomer & Physicist
Galileo Galilei

Famous Birthdays

  • Maria Anna of Austria, Electress of Bavaria (d. 1665)