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Its eight regular moons are grouped into the planet-sized Galilean moons and the far smaller Amalthea group. They were named after lovers of Zeus, the Greek equivalent of Jupiter. 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.
Parts-per-million chart of the relative mass distribution of the Solar System, each cubelet denoting 2 × 10 24 kg. This article includes a list of the most massive known objects of the Solar System and partial lists of smaller objects by observed mean radius. These lists can be sorted according to an object's radius and mass and, for the most ...
The remaining objects of the Solar System (including the four terrestrial planets, the dwarf planets, moons, asteroids, and comets) together comprise less than 0.002% of the Solar System's total mass. [h] The Sun is composed of roughly 98% hydrogen and helium, [41] as are Jupiter and Saturn.
They are respectively the fourth-, sixth-, first-, and third-largest natural satellites in the Solar System, containing approximately 99.997% of the total mass in orbit around Jupiter, while Jupiter is almost 5,000 times more massive than the Galilean moons.
Moons of the Solar System (The Planetary Society, as of March 2009) The JPL's Solar System Dynamics page "How Many Solar System Bodies". NASA/JPL Solar System Dynamics; Planetary Names: Planet and Satellite Names and Discoverers "Upper size limit for moons explained" Kelly Young. Nature (vol 441, p. 834) 14 June 2006
The new discovery increases the moons orbiting the "jewel of our solar system" to 82, surpassing Jupiter
In an almost poetic twist, the moon is also the most reflective body in the solar system—reflecting almost 100 percent of the light that reaches it. It is a beacon in more ways than one. 4.
There are at least 19 natural satellites in the Solar System that are known to be massive enough to be close to hydrostatic equilibrium: seven of Saturn, five of Uranus, four of Jupiter, and one each of Earth, Neptune, and Pluto. Alan Stern calls these satellite planets, although the term major moon is more common.