Category Archives: Scientists

Today, in 1610 Galileo Galilei discovered the first three moons of Jupiter, which are named Io, Europa & Ganymede. One day later, Simon Marius, a German astronomer independently discovered these same moons. And then, only a few days later on January 13, Galileo discovered the 4th satellite of Jupiter. Io: Volcanically active. Europa: A moonContinue reading “Van Gogh’s Starry Night Over the Rhône”