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From top to bottom: Io, Europa, Ganymede, Callisto. "Family portrait" of Jupiter and the Galilean moons captured by Juno. The Galilean moons (/ ˌɡælɪˈleɪ.ən /), [ 1 ] or Galilean satellites, are the four largest moons of Jupiter: Io, Europa, Ganymede, and Callisto. They are the most readily visible Solar System objects after Saturn, the ...
A montage of Jupiter and its four largest moons (distance and sizes not to scale) There are 95 moons of Jupiter with confirmed orbits as of 5 February 2024. [1] [note 1] This number does not include a number of meter-sized moonlets thought to be shed from the inner moons, nor hundreds of possible kilometer-sized outer irregular moons that were only briefly captured by telescopes. [4]
Exploration of Io. Painting illustrating a flyby of Io by the Galileo spacecraft. The exploration of Io, Jupiter 's innermost Galilean and third-largest moon, began with its discovery in 1610 and continues today with Earth-based observations and visits by spacecraft to the Jupiter system. Italian astronomer Galileo Galilei was the first to ...
Within a few days, he concluded that they were orbiting Jupiter: he had discovered three of Jupiter's four largest moons. [49] He discovered the fourth on 13 January. Galileo named the group of four the Medicean stars, in honour of his future patron, Cosimo II de' Medici, Grand Duke of Tuscany, and Cosimo's three brothers. [50]
Jupiter has 95 known moons and probably many more; the four largest moons were discovered by Galileo Galilei in 1610: Io, Europa, Ganymede, and Callisto. Ganymede, the largest of the four, is larger than the planet Mercury .
Europa was discovered in 1610 by the Italian astronomer Galileo Galilei. The icy body is the fourth-largest of Jupiter’s 95 known moons. ... Voyager 2 and Galileo missions — but this will be ...
The ambitious mission won't actually look for life on Jupiter's moon Europa, ... one of four discovered in 1610 by Galileo. Based on precise analysis of Europa's movements orbiting Jupiter ...
Io (/ ˈ aɪ. oʊ /), or Jupiter I, is the innermost and second-smallest of the four Galilean moons of the planet Jupiter.Slightly larger than Earth's moon, Io is the fourth-largest moon in the Solar System, has the highest density of any moon, the strongest surface gravity of any moon, and the lowest amount of water by atomic ratio of any known astronomical object in the Solar System.