Answer is an estimate using mean orbital radius
Europa 670,900km
Ganymede 1,070,400km
So their closest estimated point would 399,500km (not calculating Europa's furthest distance to Jupiter with Ganymede's closest when they're in astronomical alignment)
Io is about 262,000 miles from Jupiter, Europa is about 416,000 miles away, Ganymede is about 665,000 miles away, and Callisto is about 1.2 million miles from Jupiter.
No, they are not. Europa and Ganymede are two of planet Jupiter's 63 moons!
Europa is closer
a lot
the order is like this.Io being the closest is followed by Europa which is again followed by Ganymede and the last is Callisto. in other words :-IoEuropaGanymedeCallisto
Io Europa Ganymede Callisto
From Brightest to Dimmest: Ganymede Io Europa Callisto Use JPL's HORIZONS web ephemeris to look up apparent magnitudes of jovian satellites.
Ganymede is the largest moon of Jupiter and is located about 665,000 kilometers away from the planet.
Europa, Ganymede, and IO :)
Io, Europa, Ganymede and Callisto are the four satellites that orbit Jupiter.
Satelites of Jupiter
The four largest moons of Jupiter discovered by Galileo are Io, Europa, Ganymede, and Callisto.