Jisho

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えいせい ガリレイ衛星
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Noun
1. Galilean moons (four largest moons of Jupiter); Galilean satellites​Astronomy, See also イオ, See also エウロパ, See also ガニメデ, See also カリスト
Wikipedia definition
2. Galilean moons​The Galilean moons are the four moons of Jupiter discovered by Galileo Galilei in January 1610. They are the largest of the many moons of Jupiter and derive their names from the lovers of Zeus: Io, Europa, Ganymede, and Callisto. They are among the most massive objects in the Solar System outside the Sun and the eight planets, with radii larger than any of the dwarf planets. The three inner moons – Ganymede, Europa, and Io – participate in a 1:2:4 orbital resonance.
Read “Galilean moons” on English Wikipedia
Read “ガリレオ衛星” on Japanese Wikipedia
Read “Galilean moons” on DBpedia
Other forms
ガリレオ衛星 【ガリレオえいせい】

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