保护地球，探索宇宙，发现文明
2020年7月4日 Meeting in the Mesosphere Image Credit & Copyright: Stephane Vetter (TWAN, Nuits sacrees) Explanation: A sensitive video camera on a summit of the Vosges mountains in France captured these surprising fireworks above a distant horizon on June 26. Generated over intense thunderstorms, this one about 260 kilometers away, the brief and mysterious ...
Hitching a ride on the Mars Pathfinder mission, the Sojourner rover arrived at the Red Planet on July 4, 1997. The mission was designed to demonstrate a low-cost method for delivering a set of science instruments to Mars, and served as the foundation for the Mars rovers of today. Pathfinder landed the rover using an air bag landing system and innovative peta...
2020 July 3 Lynds Dark Nebula 1251 Image Credit & Copyright: Ara Jerahian Explanation: Stars are forming in Lynds Dark Nebula (LDN) 1251. About 1,000 light-years away and drifting above the plane of our Milky Way galaxy, the dusty molecular cloud is part of a complex of dark nebulae mapped toward the Cepheus flare region. Across the spectrum, astronomic...
2020 July 2 The Galaxy, the Planet, and the Apple Tree Image Credit & Copyright: Kristine Richer Explanation: The Old Astronomer’s Milky Way arcs through this peaceful northern sky. Against faint, diffuse starlight you can follow dark rifts of interstellar dust clouds stretching from the galaxy’s core. They lead toward bright star Antares at...
空间站外一次强大的动力太空行走；空间站的下一批乘员；阿尔忒弥斯（Artemis）计划的新进展……最近新闻速递，尽在「本周NASA」！ Credit：NASA 7月1日，NASA的克里斯·卡西迪（ChrisCassidy）和鲍勃·本肯（Bob Behnken）在不到一周的时间里进行了国际空间站外的第二次太空行走。两人继续升级着空间站的电力系统，用新的锂离子（Li-Ion）电池替换掉老化的镍氢（NiH2）电池。在未来的太空行走中，电池升级预计将继续进行，一旦任务策划团队完成了对剩余工作的评估，就会宣布接下来的任务日期和次数。 俄罗斯宇航员Ivan Vagner：“空间站上拍摄到的彗星C/2020 F3 (NEOWISE)，这是过去7年中最亮的彗星。” Credit：Ivan Vagner 凯特·鲁宾斯（Kate R...
一开始是为了寻找潜伏在极地月球陨石坑里的冰，后来变成了一项意想不到的发现，这可能有助于澄清月球形成的一些模糊历史。 NASA月球勘测轨道飞行器(LRO)上的微型无线电频率(Mini-RF)仪器的团队成员发现了新的证据，表明月球的地下可能比研究人员想象的更富含铁和钛等金属。这一发现发表在7月1日的《地球和行星科学快报》(Earth and Planetary Science Letters)上，可能有助于更清楚地了解地球和月球之间的联系。 来自马里兰州劳雷尔市约翰霍普金斯应用物理实验室(APL)的迷你射频首席研究员、该项研究的合著者维斯·帕特森(Wes Patterson)说:“LRO任务和它的雷达设备继续给我们带来关于我们最近邻居的起源和复杂性的新见解。” 这张照片是根据美国宇航局的月球勘测轨道飞行器的数据拍摄...
海卫一（Triton）的这幅彩色图像由旅行者2号（Voyager 2）探测器于1989年飞越海王星系统时拍摄。 图片来源：美国国家航空航天局（NASA）/NASA喷气推进实验室-加州理工学院(JPL-Caltech NASA）/喷气推进实验室（JPL）/美国地质调查局（USGS）。 三十年前，当NASA的旅行者2号探测器飞越海卫一时，书写了扣人心弦的行星科学篇章。 旅行者2号是有史以来唯一一艘飞越海王星的航天器，它留下了许多悬而未决的问题。旅行者2号曾揭示了海卫一表面喷射出的巨大的深色冰羽状物质，这些景色既令人惊叹又令人费解。为什么会这样呢？图像显示，海卫一的冰封地表相对比较年轻，并已被喷出的新物质一遍又一遍地覆盖重塑。这些物质究竟是什么，又是来自哪里呢？ 这样一颗距离太阳比木星还要远6倍的古老卫星怎么可能现在...
On June 26, 2020, NASA astronauts Bob Behnken and Chris Cassidy conducted the first of two spacewalks to swap batteries and upgrade power systems on the International Space Station’s Starboard-6 truss structure. Behnken is pictured here during the six-hour and seven-minute excursion. The two astronauts conducted a second spacewalk on July 1 to complete...
June 30 is Asteroid Day. Asteroids, sometimes called minor planets, are rocky, airless remnants left over from the early formation of our solar system about 4.6 billion years ago. The current known asteroid count is 958,967. This image was taken using the 200-inch Hale telescope on Palomar Mountain by astronomers at the Jet Propulsion Laboratory of the Deep ...
2020 July 1 Our Rotating Earth Video Credit & Copyright: Bartosz Wojczyński Explanation: Has your world ever turned upside-down? It would happen every day if you stay fixed to the stars. Most time-lapse videos of the night sky show the stars and sky moving above a steady Earth. Here, however, the camera has been forced to rotate so that the stars remain...