SOLAR SYSTEM

Detailed explanation-1: -Ganymede completes an orbit around Jupiter about every seven Earth days (7.155). Ganymede orbits the Sun along with Jupiter and its other satellites every 12 Earth years. Ganymede, Io, and Europa are in what is called a resonance – every time Ganymede orbits Jupiter once, Europa orbits twice, and Io orbits four times.

Detailed explanation-2: -While some of the criteria to be a planet may be blurry, one is not: you have to directly orbit a star to be a planet, therefore Ganymede isn’t. Planets orbit the sun, must be massive enough to form themselves into spheres via their own gravity, and must clear their orbital neighborhood of other similarly sized bodies.

Detailed explanation-3: -The effect of Jupiter’s magnetic field on Ganymede changes every 10 hours, which is the length of time it takes the planet to make a full rotation on its axis.

Detailed explanation-4: -The surface of Ganymede, the largest moon in the solar system, is composed of half water ice and half rock. This satellite of Jupiter is unique for its long, curved grooves in the crust, that make it unlike any other planetary body ever seen.