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Discoveries > Jupiter I


Drawings of Jupiter and satellites by Galileo

The Jovian system as seen through a small telescope: there are four Galilean satellites.

Galileo was the first who pointed a telescope towards Jupiter.
He discovered four satellites, Io, Ganymede, Europa and Callisto, which are now known as the Galilean satellites.

Left, the drawings of Galileo relating to the discovery of the satellites and, below, an image of the Jovian system as seen by Galileo. Satellites are visible and easy to identify through their fast motion. 

Origin of the names : click here.