also: ガリレイえいせい
noun
Galilean moons; Galilean satellites
Refers to the four largest moons of Jupiter discovered by Galileo: Io, Europa, Ganymede, and Callisto. Used in astronomical contexts.
See also: イオ · エウロパ · ガニメデ · カリスト
ガリレオ衛星は、木星の周りを回る四つの大きな衛星です。
The Galilean moons are four large satellites that orbit Jupiter.
ガリレイ衛星の中で、イオは火山活動が活発です。
Among the Galilean satellites, Io has active volcanism.
From the name Galileo (ガリレオ/ガリレイ) + 衛星 (satellite). Named after Galileo Galilei, who discovered these moons in 1610.