土卫二的真色
(原标题: Enceladus in True Color)
2025-06-10
浏览次数: 59
土星卫星土卫二冰层下的海洋有生命吗？这样认为的一个原因涉及到长特征——一些被称为虎纹的特征——众所周知，这些特征是从月球冰冷的内部向太空喷射冰。这些表面裂缝在月球南极上空形成了细小的冰粒云，并形成了土星神秘的e环。这一点的证据来自于卡西尼号机器人航天器，该航天器于2004年至2017年绕土星运行。这是一张近距离飞掠土卫二的高分辨率彩色照片。深深的裂缝部分被遮蔽。为什么土卫二是活跃的仍然是一个谜，因为邻近的土卫一，大约相同的大小，似乎已经死了。对喷射出的冰粒的分析表明，复杂的有机分子。这些大的富含碳的分子支持——但不能证明——土卫二表面下的海洋可能存在生命。APOD满30岁了！：明天（星期三）晚上7点在安克雷奇举行免费公开讲座
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Do oceans under the ice of Saturn's moon Enceladus contain life? A reason to think so involves long features -- some dubbed tiger stripes -- that are known to be spewing ice from the moon's icy interior into space. These surface cracks create clouds of fine ice particles over the moon's South Pole and create Saturn's mysterious E-ring. Evidence for this has come from the robot Cassini spacecraft that orbited Saturn from 2004 to 2017. Pictured here, a high resolution image of Enceladus is shown in true color from a close flyby. The deep crevasses are partly shadowed. Why Enceladus is active remains a mystery, as the neighboring moon Mimas, approximately the same size, appears quite dead. A analysis of ejected ice grains has yielded evidence that complex organic molecules. These large carbon-rich molecules bolster -- but do not prove -- that oceans under Enceladus' surface could contain life. APOD Turns 30!: Free public lecture in Anchorage tomorrow (Wednesday) at 7 pm