有比地球还宜居的行星？
飞秒激光后遗症Earth ems like the perfect hub for life becau it's the only planet known so far to host it -- but new rearch suggests that other planets could have oceans that are even more hospitable, offering life that is more varied than we know it.
地球似乎是生命的理想居因为它是目前已知唯一有生命的星球——然而最新研究表明其他一些拥有海洋的星球可能会更宜居，给生命提供更多我们想不到的资源。
Rearchers ud NASA-developed software called ROCKE-3D to simulate ocean circulation and climates on different types of exoplanets, or planets outside our solar system.
研究员们用的是美国航空航天局开发的洛基-3D软件来模拟地外行星或我们太阳系外的星星的海洋循环和气候。
Oceanic life on Earth depends on an upward flow, or upwelling, which moves nutrients from the dark depths to sunlit portions where photosynthetic life thrives.
地球上的海洋生物依赖于上升流或者叫上涌流，它们会从黑暗的海底深处把营养物质带到光照区，在这里光合作用的生物繁盛生长。
More upwelling means more nutrient resupply, which means more biological activity, rearchers say.
机械设计师研究员们称，上升流越多意味着营养补给就越多，生物活动也相应会更多。
So, a rearch team ud the software to identify "which (types of) planets will have the most efficient upwelling and thus offer particularly hospitable oceans," Stephanie Olson, lead rearcher at the University of Chicago, said Thursday while prenting the rearch at the Goldschmidt Geochemistry Conference in Barcelona.
于是，一支研究团队就用这款软件来鉴别“哪种类型的行星上升流最多，也就是说会提供最宜居的海洋，”芝加哥大学的首席研究员史蒂芬·奥森周四在巴塞罗那举行的施密特地球化学大会上说。
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"We found that higher atmospheric density, slower rotation rates, and the prence of continents all yield higher upwelling rates," Olson said.
“我们发现大气密度越高，自转速度越慢，以及大陆的出现都会带来更高的上升流速率，”奥森说道。
"A further implication is that Earth might not be optimally habitable -- and life elwhere may enjoy a planet that is even more hospitable than our own."
“进一步可以推出地球也许并不是最宜居的——另外某个地方的生命也许正享受着一个比我们的地球更宜居的星球。”
"This is a surprising conclusion," Olson said.
“这是一个令人震惊的结论，”奥森说道。
"It shows us that conditions on some exoplanets with favorable ocean circulation patterns could be better suited to support life that is more abundant or more active than life on Earth."
“它表明某个地外行星可能会拥有更好的海洋洋流循环模式，这会更适合生命居住，而这些生命可能会比地球上的更繁荣，更生机勃勃。”
NASA has said that the best chance for finding life elwhere in our own solar system could be on ocean worlds like Jupiter's moon Europa and Saturn's moon Enceladus.
美国航空航天局称在我们自己的银河系中的其他某处找到生命的最大可能来自于拥有海洋的星球比如木星的卫星欧罗巴以及土星的卫星恩克拉多斯。
But the arch for life has largely involved eking out exoplanets within the habitable zone of the stars they orbit, existing at just the right distance for a surface temperature that can support liquid water on the surface.
但寻找生命的工作主要是在它们所环绕的恒星的宜居带内寻找系外行星，这些行星的存在距离刚好适合地表温度，能够支持地表液态水的存在。
"NASA's arch for life in the univer is focud on so-called habitable zone planets, which are worlds that have the potential for liquid water oceans. But not all oceans are equally hospitable -- and some oceans will be better places to live than others due to their global circulation patterns," Olson said.
“美国航空航天局在宇宙中寻找地外生命的主要方向是在所谓的宜居带星球中找，这些星球可能会有液态水的海洋存在。不过，并不是所有的海洋都是宜居的——有些海洋因为其全球洋流循环模式会比别的更适合生命。”奥森说道。
"The are the conditions we need to look for on exoplanets."
“这些才是我们需要在地外行星上寻找的条件。”
Investigating exoplanets has to happen from afar becau with current technology, we can't reach them.
搜寻地外行星的工作必须远程进行，因为以现有技术，我们没法抵达它们。
Telescopes can help determine what the conditions might be like on exoplanets, but that data also has to be applied to models of potential climates and evolution that takes place on planets different from our own.
望远镜可以帮助检测地外行星上的条件如何，不过这些数据也必须应用在仿真模型中，模型包括气候和这个跟我们的星球不同的行星上所发生的进化。
Combined, data and models can inform scientists of which planets could host life.
奔跑的小蜗牛
联合数据和模型，科学家们就可能知道哪些星球上有生命。
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Current telescopes can't identify exoplanets to test Olson's theory, but ideally this finding could help in developing future telescopes that could ek out types of exoplanets defined in this rearch.
现有望远镜还无法检测地外行星来测试奥森的理论，不过从理论上说这次发现可以有助于研发未来的，可以找到这次研究中定义的地外行星的望远镜。
"There will always be limitations to our technology, so life is almost certainly more common than 'detectable' life," Olson said.
“我们的技术总是有限的，所以生命肯定比我们'能检测到’的更为丰富，”奥森说道。
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"This means that in our arch for life in the univer, we should target the subt of habitable planets that will be most favorable to large, globally active biospheres becau tho are the planets where life will be easiest to detect -- and where non-detections will be most meaningful."
