The moons galileo discovered how many moons

Four largest moons of Jupiter

The Galilean moons (),^[1] or Galilean satellites, are the four largest moons of Jupiter: Io, Europa, Ganymede, and Callisto.

Jupiter moons

They are the most readily visibleSolar System objects after Saturn, the dimmest of the classical planets; though their closeness to bright Jupiter makes naked-eye observation very difficult, they are readily seen with common binoculars, even under night skyconditions of high light pollution.

The invention of the telescope enabled the discovery of the moons in 1610. Through this, they became the first Solar System objects discovered since humans have started tracking the classical planets, and the first objects to be found to orbit any planet beyond Earth.

They are planetary-mass moons and among the largest objects in the Solar System. All four, along with Titan, Triton, and Earth's Moon, are larger than any of the Solar System's dwarf planets. The largest, Ganymede, is the largest moon in the