Answer:
Ganymede, a satellite of Jupiter, is the largest and most massive of the Solar System's moons. The ninth-largest object of the Solar System, it is the largest without a substantial atmosphere. It has a diameter of 5,268 km, making it 26% larger than the planet Mercury by volume, although it is only 45% as massive.
Radius: 2,634.1 km
Distance to Earth: 628.3 million km
Orbital period: 172 hours
Gravity: 1.428 m/s²
Age: 4.503 billion years
Discovered: 7 January 1610
Discoverers: Galileo Galilei, Simon Marius
Explanation:
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