然而如果这颗行星处于很好的位置，天文学家会寻找三样关键的东西：水、空气和岩石。
However, if the planet is in a good position, astronomers look for three key things: water, air and rock.
NASA的雷达天文学家周五发现了它的轨迹，并立即将它的位置精确至一公里以内的区域，比此前最好的估计精确了50倍。
NASA radar astronomers picked up its track on Friday and were immediately able to narrow its position to within one kilometer — 50 times better than their previous best estimate.
一旦天文学家知道一个太阳系外行星的大小，并对它的位置了解的足够精确的话，他们就可以求助于气候模型师，他们可以创造虚拟的大气，并且观察它是如何运转的。
Once astronomers know an exoplanet's size and location with reasonable accuracy, they can turn it over to climate modelers who can create a virtual atmosphere and see how it might behave.
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