Messenger of the gods is what mercury means.

水意思是上帝信使。

Now Mercury has quite a complex orbit.

水公转道有点复杂。

It orbits the Sun once every 88 days.

水公转周期是88天。

Mercury's nearness to the sun makes it an especially difficult planet to study.

水离太阳很近，这让水研究难度很高。

This means a year on Mercury is shorter than a day on the planet.

导致水天要短。

That first image ever acquired from orbit around Mercury was amazing.

从环绕水道上获得第张图像令人惊。

But you can calculate Mercury's orbit very precisely using only Newton's laws of gravity.

但是，只要用牛顿引力定律我们就能精确地算出水道。

The only other spacecraft to visit Mercury was NASA's Mariner 10, which flew past the planet in the mid-1970s.

另外个访问过水航天器是NASA麦仑娜10号。它是上世纪70中期经过水。

Next, we are checking out a time-lapse tour of the planet Mercury like we've never seen before.

接下来，我们要看看水延时之旅，这是我们从未见过。

Dipping below the surface, we can only infer what Mercury's internal structure is like.

表面之下，我们只能对水内部结构进行推测。

This pioneering voyage has led to a completely new idea of how Mercury may have formed.

这次开创性航行让我们对水形成过程有了全新认识。

It's the second smallest planet after Mercury yet has the largest volcano in the Solar System, Olympus Mons.

它是仅次于水第二小行，但有太阳系中最大火山奥林帕斯山。

The Mercury 7 prototype has arrived for testing.

水计划模拟雏形机到了 预备开始测试。

We're finding planets bigger than Jupiter, smaller than mercury.

我们找到了木大，水小行。

A clue to understanding these strange features was found in Mercury's chemistry.

人们在水化学成分中发现了理解这些奇怪特征线索。

Well, the hill sphere for Mercury about 175000 km, which is much smaller than the hill spears of other planets.

水山球大约175000千米，其他行山矛要小得多。

There is intense gravitational pull from the sun, as well as extreme solar radiation.

太阳对水引力作用很大，此外太阳辐射也很高。

Remember earlier, when I said Mercury's orbit is highly elliptical?

还记得之前我说过水道非常扁长吗？

But 150 years ago, astronomers noticed something strange about Mercury's orbit.

但在 150 前，天文学家发现水运行道有点奇怪。

In 14 days the Mercury 7 will be here for training.

最多再过14天 水计划7名成员就要来受训了。