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 moon of water ice.
Ganymede: Largest moon in the solar system and has its own internally generated magnetic field.
We now know that Jupiter has 53 moons that have been named. But it seems that scientists believe that there are as many as 79 moons.
Exploration is a reminder that knowledge acquisition is never at a standstill. There are more worlds to discover. I am celebrating this thought with Van Gogh and his unforgettable “Starry Night Over the Rhône.”