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Imaging of Titan from the Cassini spacecraft

机译：卡西尼号飞船对泰坦的成像

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Titan, the largest moon of Saturn, is the only satellite in the Solar System with a substantial atmosphere. The atmosphere is poorly understood and obscures the surface, leading to intense speculation about Titan's nature. Here we present observations of Titan from the imaging science experiment onboard the Cassini spacecraft that address some of these issues. The images reveal intricate surface albedo features that suggest aeolian, tectonic and fluvial processes; they also show a few circular features that could be impact structures. These observations imply that substantial surface modification has occurred over Titan's history. We have not directly detected liquids on the surface to date. Convective clouds are found to be common near the south pole, and the motion of mid-latitude clouds consistently indicates eastward winds, from which we infer that the troposphere is rotating faster than the surface. A detached haze at an altitude of 500 km is 150 - 200 km higher than that observed by Voyager, and more tenuous haze layers are also resolved.
机译：土星最大的卫星土卫六是太阳系中唯一拥有大量大气的卫星。人们对大气的了解很少，并且使表面模糊不清，从而导致人们对泰坦的本质产生了强烈的猜测。在这里，我们从卡西尼号飞船上的影像科学实验中介绍了泰坦的观测结果，这些观测值解决了其中一些问题。这些图像揭示了复杂的表面反照率特征，暗示了风沙，构造和河流过程。它们还显示了一些可能是冲击结构的圆形特征。这些观察结果表明，泰坦历史上已经发生了重大的表面改性。迄今为止，我们还没有直接检测到表面上的液体。对流云在南极附近很常见，中纬度云的运动始终表明是东风，从中我们推断对流层的旋转速度快于地表。在500 km的高空上，雾霾比旅行者号观测到的雾霾高150至200 km，并且还解决了更多薄弱的雾霾层。

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