美国国家航空航天局NASA每日一图(天文)-2017年7月31日

 

2017 July 31

Pluto Flyover from New Horizons
Credit: NASA, JHUAPL, SwRI, P. Schenk & J. Blackwell (LPI); Music Open Sea Morning by Puddle of Infinity
Explanation: What if you could fly over Pluto -- what might you see? The New Horizons spacecraft did just this in 2015 July as it shot past the distant world at a speed of about 80,000 kilometers per hour. Recently, many images from this spectacular passage have been color enhanced, vertically scaled, and digitally combined into the featured two-minute time-lapse video. As your journey begins, light dawns on mountains thought to be composed of water ice but colored by frozen nitrogen. Soon, to your right, you see a flat sea of mostly solid nitrogen that has segmented into strange polygons that are thought to have bubbled up from a comparatively warm interior. Craters and ice mountains are common sights below. The video dims and ends over terrain dubbed bladed because it shows 500-meter high ridges separated by kilometer-sized gaps. Although the robotic New Horizons spacecraft has too much momentum ever to return to Pluto, it has now been targeted at Kuiper Belt object 2014 MU 69, which it should shoot past on New Year's Day 2019.

2017年7月31日

来自新视野的冥王星天桥
信用证: NASA, JHUAPL, SwRI,P.Schenk&J. Blackwell(LPI); 音乐 开放海上早晨由无限水坑
说明: 如果你能飞过冥王星 - 你会看到什么?“ 新视野”航天器在 2015年7月份就 以这样的速度,以每小时约8万公里的速度射击了遥远的世界。最近,来自这个壮观的通道的许多图像已经被色彩增强,垂直缩放,并且数字地组合成 特色的两分钟的延时视频。随着你的旅程开始,光明在山上 被认为是由冰水组成,但是被冷冻的氮气着色。很快,在你的右边, 你看到一个大部分是 固体氮的平坦海 ,已经分裂成奇怪的多边形,被认为是 从一个比较温暖的内部冒出来的 。火山口和冰山是 以下常见的景点。该视频 变暗,并结束在地形配成刀刃,因为它表明由公里大小的间隙分开的500米高的山脊。虽然机器人新视野飞船有太多的动力有史以来回到冥王星,它现在已经瞄准了Kuiper皮带对象2014 MU 69,它应该在2019年元旦过年。视频变暗并结束,地形被称为叶片,因为它显示了500米高的山脊,以千米大小的间隙分开。虽然机器人新视野飞船有太多的动力有史以来回到冥王星,它现在已经瞄准了Kuiper皮带对象2014 MU 69,它应该在2019年元旦过年。视频变暗并结束, 地形被称为 叶片,因为它显示了500米高的山脊,以千米大小的间隙分开。虽然机器人 新视野飞船有太多的 动力有史以来回到 冥王星,它现在已经瞄准了Kuiper皮带对象 2014 MU 69,它应该在2019年元旦过年。

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