阿波罗17号的月艇
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DART太空船与双卫一
2023年3月9日 DART vs Dimorphos Image Credit: NASA, Johns Hopkins APL, DART Explanation: On the first planetary defense test mission from planet Earth, the DART spacecraft captured this close-up on 26 September 2022, three seconds before slamming into the surface of asteroid moonlet Dimorphos. The spacecraft’s outline with two long solar panels is traced at its projected point of impact between two boulders. The larger boulder is about 6.5 meters across. While the DART (Double Asteroid Redirection Test) spacecraft had a mass of some 570 kilograms, the estimated mass of Dimorphos, the smaller member of a near-Earth binary asteroid system, was about 5 billion kilograms. The direct kinetic impact of the spacecraft measurably altered the speed of Dimorphos by a fraction of a percent, reducing its…
猎户座的地球图像
2022年11月17日 Planet Earth from Orion Image Credit: NASA, Artemis 1 Explanation: A Space Launch System rocket left planet Earth on Wednesday, November 16 at 1:47am EST carrying the Orion spacecraft on the Artemis 1 mission, the first integrated test of NASA’s deep space exploration systems. Over an hour after liftoff from Kennedy Space Center’s historic Launch Complex 39B, one of Orion’s external video cameras captured this view of its new perspective from space. In the foreground are Orion’s Orbital Maneuvering System engine and auxillary engines, at the bottom of the European Service Module. Beyond one of the module’s 7-meter long extended solar array wings lies the spacecraft’s beautiful home world. The Artemis 1 mission will last almost four weeks, testing capabilities to enable human exploration…
如何登陆火星？极其小心！
将航天器送往火星是一回事，安全到达火星表面则完全是另外一个挑战！下面这个60秒的视频来自美国航空航天局（NASA）喷气推进实验室（Jet Propulsion Laboratory），介绍了三种降落在红色星球表面的方法。 您的浏览器不支持该播放器 版权：NASA JPL 《火星一分钟》系列延伸阅读 一：火星真的是红色的吗？ 二：好奇号登陆火星有多难？ 三：如何前往火星？