From Earth they're pretty similar, in fact, I can't even tell their brightness apart through binoculars. You can see them for yourself with a pair of binoculars and something to rest them against. But going by the magnitude scale, Callisto's the brightest. Io 5.5 Europa 5.7 Ganymede 5.1 Callisto 6.1
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 brightest moon out of Ganymede, Europa, Io, and Callisto. It is the largest moon of Jupiter and is even larger than the planet Mercury. Ganymede's surface is composed of a mix of rocky material and water ice, which likely contributes to its brightness.
Ganymede would appear the brightest from the surface of Jupiter due to its larger size and higher reflectivity compared to Europa, Callisto, and Io. Ganymede is the largest moon in the solar system and has a highly reflective icy surface, making it more luminous when viewed from Jupiter.
Io Europa Ganymede Callisto
From brightest to dimmest, the order of brightness for the four largest moons of Jupiter when viewed from its surface is Io, Europa, Ganymede, and Callisto. Io tends to be the brightest due to its active volcanism, while Callisto is the dimmest because of its icy composition and lack of surface activity.
going by the magnitude scale, Callisto's the brightest. Io 5.5 Europa 5.7 Ganymede 5.1 Callisto 6.1
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 brightest moon out of Ganymede, Europa, Io, and Callisto. It is the largest moon of Jupiter and is even larger than the planet Mercury. Ganymede's surface is composed of a mix of rocky material and water ice, which likely contributes to its brightness.
Ganymede would appear the brightest from the surface of Jupiter due to its larger size and higher reflectivity compared to Europa, Callisto, and Io. Ganymede is the largest moon in the solar system and has a highly reflective icy surface, making it more luminous when viewed from Jupiter.
Io Europa Ganymede Callisto
Ganymede is Jupiter's largest moon. The top four of its largest moons are Europa, Io, Callisto, and Ganymede.
From brightest to dimmest, the order of brightness for the four largest moons of Jupiter when viewed from its surface is Io, Europa, Ganymede, and Callisto. Io tends to be the brightest due to its active volcanism, while Callisto is the dimmest because of its icy composition and lack of surface activity.
Io, Ganymede, Callisto, and Europa stay in orbit with Jupiter cause Jupiter has a strong gravitational pull on celestial bodies around it.
4 actually, Io, Europa, Ganymede, Callisto
They are the four moons which Galileo discovered: Callisto, Europa, Ganymede and Io.
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.
Ganymede would appear to be the brightest moon from the surface of Jupiter. This is because Ganymede is the largest moon in the solar system and it has a high albedo, meaning it reflects a lot of sunlight. Its larger size and reflective surface would make it appear brighter than the other moons when viewed from Jupiter.