Fourth, and least likely: Life on Titan!
第四，最小可能性：土卫六真的发现生命！
On Titan, methane forms clouds and maybe even rain.
在土卫六上，甲烷可以形成云甚至降雨。
The northeast just had its first big snow of the season. Meanwhile, on Titan, it was foggy.
美国东北部刚迎来今年冬季的第一场大雪，与此同时，在土星的卫星泰坦上，却是雾蒙蒙的天气。
First stop on the list of potential destinations for a balloon is Saturn's biggest moon Titan.
列表上气球的第一个潜在的目的地是土星最大的卫星泰坦。
The only problem is the reservoirs are located about 750 million miles away on Saturn's moon Titan.
唯一的问题是那个储藏库在土星的卫星泰坦（Titan)上，离我们有7亿5千万英里远。
A third nonthermal process known as photochemical escape operates on Mars and possibly on Titan.
第三种形式的非热逸过程叫做光化学逃逸，只见于火星，但土卫六也可能存在这种现象。
In 2005, the Huygens probe landed on Titan and gave humanity its first view of its unusual surface.
2005年，惠更斯号探测器着陆土卫六，使人类第一次看到了其不寻常的表面。
That's a remote possibility, but if life does exist on Titan, let's hope the seas there are still pirate-free.
这个可能性微乎其微，但是如果真的在泰坦上存在生命的话，希望这片海还能够让我们随意出入吧。
Suggestions included microbes on the Red Planet, photosynthesis on Titan, or perhaps even bacteria on an asteroid.
猜测包括了火星上发现微生物、土卫六上的光合作用、甚至是一颗小行星上发现了细菌。 全都不是——NASA发现了一种能消来砷的细菌以及将它们组成它的DNA。
Given all of this, if life were to be found on Titan, it would blast away everything we understand about how life works.
考虑到所有这些情况，如果在泰坦上发现了生命，它将打破我们关于生命运转的一切认知。
On Earth, they'd be filled with water, but it's just too cold on Titan; so these lakes contain a mixture of methane and ethane.
在地球上它们将会充满水，但是在极为寒冷的泰坦上湖中所含的是甲烷和乙烷的混合物。
The Nile, as it turns out, is also a river on Titan—provided you squint and take a little creative license with your nomenclature.
事实上，如果你仔细观察，并在命名上来点小创意，就会发现泰坦上也有尼罗河。
Lorenz and colleagues calculated the amount of liquid hydrocarbons on Titan using radar data gathered from the orbiting Cassini spacecraft.
Lorenz和同事利用轨道环绕飞船Cassini号上收集的雷达数据计算了泰坦上的液态烃的含量。
An additional reason for studying the rocks of Racetrack Playa is that its qualities resemble those at a drying-up lake on Saturn's moon Titan.
之所以研究赛马场盐湖的石头，因为它的情况和土星的卫星Titan(泰坦)上干枯的湖情况相似。
This would result in a lack of acetylene on Titan and a depletion of hydrogen close to the moon's surface, where the microbes would live, they said.
他们说：这可能造成“提坦”卫星上乙炔的缺失和靠近卫星表面氢的耗尽，那里是微生物生活之处。
Every morning I download and process that data to determine the amount of cloud cover on Titan. The result is that I get a daily weather report for Titan.
每天早晨，我下载并处理那些数据，以便推算出泰坦上的云层覆盖量。
Layers of haze covering Saturn's moon Titan are seen in this image taken by Voyager 1 on Nov. 12, 1980 at a range of 13,700 miles (22,000 kilometers).
图中可见分层的雾团，它覆盖着土星的月亮——泰坦；这幅图像由星际旅行者1号于1980年11月1日在距离泰坦22000公里(合约13700英里)的高度拍摄而成。
In 2005 the robotic Huygens probe landed on Titan, Saturn's enigmatic moon, and sent back the first ever images from beneath Titan's thick cloud layers.
2005年惠更斯号探测机器人着陆土卫六(泰坦)——土星谜一样的卫星，从土卫六厚厚的云层下面发回了第一张照片。
The balloons would be used to transport equipment on unmanned missions. First stop on the list of potential destinations for a balloon is Saturn's biggest moon Titan.
气球在无人的任务会被用来当作运输设备。列表上气球的第一个潜在的目的地是土星最大的卫星泰坦。
Extrapolating from lake depths on Earth, the researchers estimate several of the lakes on Titan each contain more than the total amount of natural gas on Earth, estimated to be about 130 billion tons.
科研者们根据地球上的湖泊的深度推断，泰坦上有几个湖泊中每个湖泊的天然气含量都超过地球上的总量，估计有1300亿吨之多。
Titan looms just over the thin rings, while dark ring shadows on Saturn show the Sun to be above the ring plane.
靠近中的土卫六(泰坦)正处于纤细的光环上方。而投在土星表面的光环阴影表明，太阳正位于光环平面的上方。
Even though Titan lacks sunlight, NASA's Huygens probe detected what looked like liquid methane on the mini planet's surface in 2005.
虽然泰坦上缺少阳光，NASA的惠更斯号探测器于2005年在这颗微型星球表面探测到一些类似液态甲烷的物质。
Behind Dione, hints of atmospheric banding can be seen on the North Pole of hazy Titan, the only known moon with a fully developed atmosphere.
在土卫四的背后，可以看到在模糊的土卫六北极上的大气带的迹象，土卫六是目前仅知的具有完全成熟大气层的卫星。
Behind Dione, hints of atmospheric banding can be seen on the North Pole of hazy Titan, the only known moon with a fully developed atmosphere.
在土卫四的背后，可以看到在模糊的土卫六北极上的大气带的迹象，土卫六是目前仅知的具有完全成熟大气层的卫星。
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