But Jupiter's moon Ganymede is bigger than Mercury.

但星的卫星卫三其实比水星还大。

To date,   we have not proved that life arose on Mars or Ganymede, for all the conjecture on that front.

迄今为止， 我们还没有证明生命起源火星或卫三，尽管这方面有很多猜想。

The first is Titan, a monster satellite that's actually bigger than Mercury, not that much smaller than Mars, and second in moon size ranking only to Jupiter's moon Ganymede.

一个是土卫六（泰坦），一颗比水星大、比火星小不了多少的巨型卫星，它的是仅卫三之外最大的卫星。

Her chair being a far more comfortable one than his she still slept on inside his great-coat, looking warm as a new bun and boyish as a Ganymede.

她的椅子比的舒服得多， 她仍然睡在的大衣里面， 看起来像新面包一样温暖， 像卫三一样孩子气。

After a few years of whizzing around Jupiter and its moons, in 2034 JUICE will enter orbit around Ganymede — which, being bigger than the planet Mercury, is actually the solar system's largest moon.

在围绕星及其卫星呼啸穿梭数之后，2034 JUICE 将进入围绕卫三的轨道，而它比水星还大，是太阳系最大的卫星。

Whether Ganymede' s oceans have a similar chemical endowment is one of the biggest questions about the moon, says Leigh Fletcher, a planetary scientist at the University of Leicester, and one of the scientists working on the mission.

莱斯特大学的行星科学家利弗莱彻是此任务的科学家之一，说，卫三的海洋是否有类似的化学物质是有关这颗卫星最大的问题之一。

Ganymede is the largest moon in our solar system.

伽尼墨德(卫三)是太阳系里最大的卫星。

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

卫三是可能含有海洋的星卫星之一。

They're called Ganymede, Callisto, and Europa.

这几个分别叫卫三、卫四和卫二。

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，最大的卫三可能有一个铁核。

Ganymede is also criss-crossed with large grooves.

卫三上也布满了纵横交错的沟壑。

The biggest of Jupiter's moons is Ganymede.

星最大的卫星是卫三（盖尼米德）。

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的卫星，体积甚至超过水星！

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

探测器的摄像头将为现有的低分辨率卫三表面地图添加更多细节。

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

卫一、卫二和卫三的引力相互影响，这是它们内部热量的来源。

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。

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

大小也不是卫三唯一的类行星特征。

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、辐射更少的地方。

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的四颗卫星，卫一，卫二，卫三，卫四。