One of them would explore Jupiter's moon Io and one of them would fly by Neptune's moon Triton.

另外一个将探索木卫艾奥，还有一个将飞到海王星卫星崔顿上。

The surfaces of the moon, Mars, Mercury, Venus, and even Jupiter's angry little moon Io are all overwhelmingly volcanic.

月球、火星、水星、金星，甚至木星愤怒小卫星木卫一表面都有大量火。

Io is one of Jupiter's moons.

Io 是木星一个卫星。

Io, for example, has an elliptical orbit.

例如木卫一 ，有一个椭圆形轨道。

Unlike the volcanoes on Earth, Io erupts plumes of sulfur.

不像球上火，木卫一上火喷发是硫磺。

Then Io, still in the form of a cow, was set free.

爱娥自由了，但她仍然是牛样子。

Zeus then turned Io into a beautiful white little cow to avoid Hera.

为了躲避赫拉，宙斯把爱娥变成了一头漂亮小白牛。

The first major moon you come into is Io, which is this very active place.

你第一个来到主要卫星是爱莪(木卫一)，是个非常活跃。

Being a very jealous woman, Hera was so angry that she wanted to revenge Io.

赫拉是一个嫉妒心很重女人，她非常生气，想要报复爱娥。

In order to save Io from the monster, Zeus sent Hermes to kill him.

为了救出爱娥, 宙斯派赫尔墨斯去杀掉阿古斯。

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

木卫三和木卫一都通过磁场与木星联结。

See, depending on the time of year, Io emerged later than expected, or earlier than expected.

随着一年中时间不同，伊娥有时会出现得稍晚，有时会出现得略早。

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

木卫一、木卫二和木卫三引力相互影响，这是它们内部热量来源。

Romer noticed that Io then emerged later than it was expected to.

罗默发现那时伊娥就会姗姗来迟。

It was discovered in 1892, and it's red — probably polluted by sulfur from Io.

它于1892年被发现，且大概是被木卫一上来硫染红了。

They showed a surface completely lacking in craters, meaning something had resurfaced the moon like Io or Venus.

它表面毫无被撞击痕迹，这意味着像木卫一或金星一样，有些东西重塑了它表面。

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

从球上就可以用望远镜看到最大四颗卫星，木卫一，木卫二，木卫三，木卫四。

So here's the Solar System, there's the sun, there's the Earth, here's Jupiter, and here is Jupiter's innermost moon, Io.

我们拿石头打比，这个是太阳，这是球，这是木星，这个是离它最近卫星伊娥(即木卫一)。

When the Voyager 1 space probe passed Io in 1979 it revealed a surface that was really weird.

当旅行者1号太空探测器在1979年经过木卫一时，揭示了一个非常奇特表。

Now, Romer's genius was to realise that had nothing to do at all with the orbit of Io around Jupiter.

罗默天才就在于他意识到这个误差并非来自伊娥绕木星运转轨道。