Because Ganymede is orbiting Jupiter whereas planets are orbiting the sun
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Ganymede is not a planet because it does not meet the criteria set by the International Astronomical Union (IAU) for planetary status. In particular, Ganymede does not clear its orbital path of other debris, one of the key requirements to be considered a planet under the IAU definition. Instead, it is classified as a moon of Jupiter.
Yes. Ganymede is actually larger than the planet Mercury.
Ganymede is considered a moon because it orbits a planet and not the sun.
Mercury is smaller than Ganymede. Ganymede is the largest moon in our solar system, even larger than the planet Mercury.
Ganymede is regarded as a moon because it orbits a planet. In order to be considered a planet it would have to orbit the sun.
No. Ganymede is one of Jupiter's moons. There are no volcanoes on Jupiter.