Because it has the highest albedo, or it's ability to diffuse light from it's surface, combined with the fact that it is the largest moon of Jupiter.
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 is the largest moon of Jupiter and would appear the brightest from the planet due to its size and reflectivity. Ganymede's icy surface reflects a high amount of sunlight, making it one of the brightest objects in Jupiter's sky.
Jupiter's biggest moon is called Ganymede.
Ganymede is the largest known moon in the Milky Way Galaxy.
From Brightest to Dimmest: Ganymede Io Europa Callisto Use JPL's HORIZONS web ephemeris to look up apparent magnitudes of jovian satellites.
Jupiters moon Ganymede
Jupiters biggest moon is Ganymede
Ganymede is Jupiter's largest moon. The top four of its largest moons are Europa, Io, Callisto, and Ganymede.
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.
going by the magnitude scale, Callisto's the brightest. Io 5.5 Europa 5.7 Ganymede 5.1 Callisto 6.1
People don't know that and probably never will but the biggest moon in our solar system is Jupiters moon Ganymede
Ganymede is the largest moon of Jupiter and would appear the brightest from the planet due to its size and reflectivity. Ganymede's icy surface reflects a high amount of sunlight, making it one of the brightest objects in Jupiter's sky.
Jupiter's biggest moon is called Ganymede.
Ganymede is the largest known moon in the Milky Way Galaxy.
From Brightest to Dimmest: Ganymede Io Europa Callisto Use JPL's HORIZONS web ephemeris to look up apparent magnitudes of jovian satellites.
Jupiters 4 moons are called Ganymede,Io,Callisto,and Europa.
Ganymede would appear brightest from Jupiter since it is the largest moon in the solar system and has a highly reflective icy surface. This combination of size and reflectivity would make it appear the brightest when viewed from Jupiter.