木星轨道左侧最远的是木卫四，然后是木卫二和木卫一，独自在右侧的是木卫三。
Farthest from Jupiter is Callisto, with Europa and Io all left of the planet's disk, while Ganymede stands alone at the right.
根据离木星的距离排列，木星的4颗卫星依次为：木卫一、木卫二、木卫三、木卫四。
In their outward order from Jupiter, Jupiter's 4 major moons are Io, Europa, Ganymede and Callisto.
木卫三，木卫二和木卫一在木星的一边，而木卫四却在另一边。
Ganymede, Europa and Io are on one side of Jupiter, while Callisto is on the other side.
木卫一和木卫二大约和月球一样大，而木卫三和木卫四大概是月球直径的一半。
Io and Europa are about the same size as our moon, whereas Ganymede and Callisto have diameters that are half again our moon's diameter.
有科学家正在提议，未来可能的木星探测计划能够在木卫二和木卫三上搜寻地下海洋，那里或许拥有一些对维持生命十分重要的元素。
Possible future missions to Jupiter are being proposed that can search Europa and Ganymede for deep oceans that may harbor elements thought important for supporting life.
有科学家正在提议，未来可能的木星探测计划能够在木卫二和木卫三上搜寻地下海洋，那里或许拥有一些对维持生命十分重要的元素。
Possible future missions to Jupiter are being proposed that can search Europa and Ganymede for deep oceans that may harbor elements thought important for supporting life.
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