2022年3月26日

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Pluto at Night
Image Credit:
NASA, Johns Hopkins Univ./APL, Southwest Research Institute

Explanation: The night side of Pluto spans this shadowy scene. In the stunning spacebased perspective the Sun is 4.9 billion kilometers (almost 4.5 light-hours) behind the dim and distant world. It was captured by far flung New Horizons in July of 2015 when the spacecraft was at a range of some 21,000 kilometers from Pluto, about 19 minutes after its closest approach. A denizen of the Kuiper Belt in dramatic silhouette, the image also reveals Pluto’s tenuous, surprisingly complex layers of hazy atmosphere. Near the top of the frame the crescent twilight landscape includes southern areas of nitrogen ice plains now formally known as Sputnik Planitia and rugged mountains of water-ice in the Norgay Montes.

Tomorrow’s picture: titanic flash


冥王星的夜面
影像提供:
NASA, Johns Hopkins Univ./APL, Southwest Research Institute

说明: 冥王星的夜面横跨这片黑夜景观。在这个精采的太空视角里,太阳位在这颗昏暗遥远矮行星的后方约49亿公里(4.5光时)之处。它是由已然远去的新视野号摄于2015年,拍照时,这部太空船离冥王星21,000公里,大约在最近距通过后的19分钟。影像除了记录这颗以剪影之姿现身的凯伯带天体之外,也呈现了冥王星稀薄但意外复杂的朦胧大气层。影像顶缘附近的蛾眉暮光原野,涵盖了冥王星南方,正式名称为史泼尼克平原的氮冰原以及诺盖山脉的水冰嵯峨山峰。

明日的图片: titanic flash

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