In 1610, Galileo Galilei observed 4 moons rotating around Jupiter
Galileo Galilei discovered it on 7 January 1610.
nothing would happen
jupiters ice moon is Io
Ganymede is Jupiter's largest moon. The top four of its largest moons are Europa, Io, Callisto, and Ganymede.
Europa is Jupiters moon.
Jupiters moon is thought to contain microscopic ice crystals but this theory has not yet been proven
Jupiters moon Ganymede
Galileo
Obviously not, Europa is a moon, not a star.
Jupiters biggest moon is Ganymede
Jupiters Moons
Europa is one of Jupiters moons. Jupiter has many moons, but Europa is one of the four large moons that was discovered in 1610 by Galileo Galilei (and possibly independently by Simon Marius around the same time).