地球周围温暖的大气层和望远镜散出的热量使得我们根本不可能找到比行星更小的物体。
Our own warm atmosphere and the heat generated by the telescope would make it impossible to detect objects as small as planets.
逐渐变得温暖的大气层意味着更多的水蒸气，本身就是一种温室气体的水蒸气使得温室效应更加恶化。
Warmer atmospheric air means more water vapor, which is itself a greenhouse gas, exacerbating the problem.
另一方面，像地球的卫星这种相对温暖、表面引力较小的天体，它们连最重的气体也无法容纳，因此也没有大气层。
On the other hand, a comparatively warm body with a small surface gravity, like Earth's moon, is unable to hold even the heaviest gas and thus lacks an atmosphere.
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