But Jupiter's moon Ganymede is bigger than Mercury.

木星的星木三其实比水星还大。

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于火星或木三，尽管这方面有很多猜想。

Looking at three of the moons of Jupiter, for every once that Ganymede orbits the planet, Europa goes round twice and Io four times.

观察木星的三颗星，每当木三绕木星公转一周，木二便绕行两周， 而木一则绕行四周。

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.

一个是土六（泰坦），一颗比水星大、比火星小不了多少的巨型星，它的是仅次于木三之外最大的星。

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.

她的椅子比他的舒服得多， 她仍然睡在他的大衣里面， 看起来像新面包一样温暖， 像木三一样孩子气。

It will come to the system just 15 months after Clipper, and it'll even be doing a few flybys of Europa before settling into a tight orbit around Ganymede.

它将在“剪刀号” 抵达后仅15个月到达该系统，并在木三的紧密轨道前， 对欧罗巴行几次飞越探测。

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.

在绕木星及其星呼啸穿梭数年之后，2034 年 JUICE 将绕木三的轨道，而它比水星还大，是太阳系最大的星。

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次任务的科学家之一，他说，木三的海洋是否有类似的化学物质是有关这颗星最大的问题之一。

Ganymede is the largest moon in our solar system.

伽尼墨德(木三)是太阳系里最大的星。

Ganymede is also criss-crossed with large grooves.

木三上也布满了纵横交错的沟壑。

The biggest of Jupiter's moons is Ganymede.

木星最大的星是木三（盖尼米德）。

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

大小也不是木三唯一的类行星特征。

They're called Ganymede, Callisto, and Europa.

这几个分别叫木三、木四和木二。

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

木三是可能含有海洋的木星星之一。

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

木三是太阳系中最大的星，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，木三离木星更远，在更安全、辐射更少的地方。

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木三表面地图添加更多细节。

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

液态水海洋！

In many ways it's similar to its big brother Ganymede, mostly rock and ice.

它与它的老大哥木三有许多相似之处，主要由岩石和冰构成。

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星，木一，木二，木三，木四。