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Ganymede, or Jupiter III, is the largest and most massive natural satellite of Jupiter, and in the Solar System. Despite being the only moon in the Solar System with a substantial magnetic field , it is the largest Solar System object without a substantial atmosphere.
It is the only satellite in the Solar System known to possess a magnetosphere, likely created through convection within the liquid iron core. [43] Ganymede is composed primarily of silicate rock and water ice, and a salt-water ocean is believed to exist nearly 200 km below Ganymede's surface, sandwiched between layers of ice. [44]
The seven largest natural satellites in the Solar System (those bigger than 2,500 km across) are Jupiter's Galilean moons (Ganymede, Callisto, Io, and Europa), Saturn's moon Titan, Earth's moon, and Neptune's captured natural satellite Triton. Triton, the smallest of these, has more mass than all smaller natural satellites together.
Among them is Ganymede, the largest and most massive moon in the Solar System. Its 87 known irregular moons are organized into two categories: prograde and retrograde . The prograde satellites consist of the Himalia group and three others in groups of one.
All together, Jupiter's moons form a satellite system called the Jovian system. The most massive of the moons are the four Galilean moons: Io, Europa, Ganymede, and Callisto, which were independently discovered in 1610 by Galileo Galilei and Simon Marius and were the first objects found to orbit a body that was neither Earth nor the Sun.
For simplicity and comparative purposes, the values are manually calculated assuming that the bodies are all spheres. The size of solid bodies does not include an object's atmosphere. For example, Titan looks bigger than Ganymede, but its solid body is smaller.
factual satellite, fictional life Europa, Callisto, Ganymede, Io and Titan in "Cowboy Bebop" (1998) The Moon in A Trip to the Moon (1903) and many other films; Europa in Europa Report (2013) and Watchmen (2019) Titan in Marvel Comics; fictional satellite Andoria from the Star Trek franchise; Yavin 4 from Star Wars (1977) Endor in Return of the ...
Amazônia-1 is the first Earth observation satellite developed by Brazil, helped by Argentina's INVAP, who provided the main computer, attitude controls and sensors, and the training of Brazilian engineers,[8] and launched at 04:54:00 UTC (10:24:00 IST) on 28 February 2021.