Earth's moon, Saturn's Titan, Jupiter's Callisto, or Jupiter's Ganymede?

地球卫星，土星土卫六，星卫四，还是星Ganymede?

Ganymede is the largest moon in our solar system.

伽尼墨德(卫三)是太阳系里最大卫星。

Ganymede is also criss-crossed with large grooves.

卫三上也布满了纵横交错沟壑。

They're called Ganymede, Callisto, and Europa.

这几个卫三、卫四和卫二。

The biggest of Jupiter's moons is Ganymede.

星最大卫星是卫三（尼米德）。

Ganymede is one of Jupiter's likely ocean-bearing moons.

卫三是可能含有海星卫星之一。

Size isn't the only planet-like characteristic of Ganymede, either.

大小也不是卫三唯一类行星特征。

Oh, one more thing: both Ganymede and Io are magnetically connected to Jupiter.

卫三和卫一都通过磁场与星联结。

Ganymede is the largest moon in the solar system, and is even larger than the planet Mercury!

卫三是太阳系中最大卫星，体积甚至超过水星！

Ganymede, on the other hand, is further out in a safer, less radiation-riddled part of Jupiter's neighborhood.

另一方面，卫三离星更远，在更安全、辐射更少地方。

The probe' s cameras will add much more detail to the existing, low-resolution maps of Ganymede' s surface.

探测器摄像头将为现有低辨率卫三表面地图添加更多细节。

Ganymede has a surprise well below its surface, too: Oceans of water!

液态水海！

The four largest moons, Io, Europa, Ganymede, and Callisto, are large enough to be seen from Earth with a telescope.

从地球上就可以用望远镜看到最大四颗卫星，卫一，卫二，卫三，卫四。

They're mostly rock and ice, though Ganymede, the biggest, may have an iron core.

它们大多是岩石和冰构成，最大卫三可能有一个铁核。

There was Ganymede, the beautiful boy who Zeus made drink-bearer to the gods.

有伽倪墨得斯，一个美丽男孩，宙斯让他成为众神侍酒者。

And unlike the abyss that may exist inside Ganymede, for instance, inaccessible, deep inside Europa is somewhat closer to the surface.

例如，与卫三内部可能存在深渊不同，卫二深处无法进入深渊更浅。

Juice will investigate three of the so-called Galilean moons-Callisto, Europa and Ganymede, all of which are thought to have subsurface oceans.

“果汁”探测器将调查三颗所谓伽利略卫星——卫四、卫二和卫三，这三颗卫星都被认为拥有地下海。

Jupiter's moons include the largest in the solar system, Ganymede, an ocean moon called Europa and a volcanic moon named lo.

星卫星包括太阳系中最大卫三，一颗名为卫二海卫星和一颗名为lo火山卫星。

Io, Europa, and Ganymede are close enough to interact gravitationally, providing a source of heat for their interiors.

卫一、卫二和卫三引力相互影响，这是它们内部热量来源。

Like Ganymede and Io, the interior of Europa is kept warm by tidal flexing from the other moons, keeping the ice melted.

和卫三、卫一一样，卫二内部也因为其他卫星潮汐作用而被加热，从而使冰保持融化状态。