Io, Europa, and Ganymede, the three largest moons of Jupiter, have synchronized rotation periods due to a phenomenon known as orbital resonance. Io takes about 1.8 days to complete one rotation, while Europa and Ganymede have rotation periods of about 3.5 days and 7.2 days, respectively. Despite their differing rotation periods, they are locked in a 1:2:4 resonance, meaning that for every one orbit Io makes, Europa completes half an orbit, and Ganymede completes a quarter. This gravitational interaction keeps their rotation periods closely linked.
The four largest moons of Jupiter discovered by Galileo are Io, Europa, Ganymede, and Callisto.
It is Jupiter.
Europa is smaller than Ganymede and Callisto, but larger than Io. Ganymede is the largest moon in the solar system, and Callisto is the second-largest. Europa ranks as the sixth-largest moon in the solar system.
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.
It is Jupiter.
No, they are not. Europa and Ganymede are two of planet Jupiter's 63 moons!
Europa is closer
Io Europa Ganymede Callisto
Europa, Ganymede, and IO :)
From Brightest to Dimmest: Ganymede Io Europa Callisto Use JPL's HORIZONS web ephemeris to look up apparent magnitudes of jovian satellites.
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, 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.
going by the magnitude scale, Callisto's the brightest. Io 5.5 Europa 5.7 Ganymede 5.1 Callisto 6.1
Europa is the second large moon of Jupiter, orbiting between the moons Io and Ganymede.
It is Jupiter.