保护地球，探索宇宙，发现文明
2021年10月11日 Juno Flyby of Ganymede and Jupiter Video Credit: Images: NASA, JPL-Caltech, SWRI, MSSS; Animation: Koji Kuramura, Gerald Eichstädt, Mike Stetson; Music: Vangelis Explanation: What would it be like to fly over the largest moon in the Solar System? In June, the robotic Juno spacecraft flew past Jupiter’s huge moon Ganymede and took images tha...
2021年10月10日 Full Moon Silhouettes Video Credit & Copyright: Mark Gee; Music: Tenderness (Dan Phillipson) Explanation: Have you ever watched the Moon rise? The slow rise of a nearly full moon over a clear horizon can be an impressive sight. One impressive moonrise was imaged in early 2013 over Mount Victoria Lookout in Wellington, New Zealand. With detai...
2021年10月9日 50 Light-years to 51 Pegasi Image Credit & Copyright: Josselin Desmars Explanation: It’s only 50 light-years to 51 Pegasi. That star’s position is indicated in this snapshot from August, taken on a hazy night with mostly brighter stars visible above the dome at Observatoire de Haute-Provence in France. Twenty-six years ago, in Oct...
在这张由毅力号火星车的Mastcam-Z仪器于2021年4月17日拍摄的图片中，可以看到科学团队称之为“Scarp a”的悬崖。 影像来源：NASA/JPL-Caltech/ASU/MSSS 来自NASA在红色星球上的最新六轮车的图片表明，该地区曾经历过严重的洪水事件。 NASA毅力号火星车科学团队的一篇新论文详细介绍了耶泽罗陨石坑现已干涸的湖泊的水文循环，这比最初认为的更加复杂和有趣。这些发现是基于火星车提供的长而陡峭的斜坡的详细图像，这些斜坡被称为悬崖，或者说是三角洲上的陡崖，这些斜坡是由很久以前为陨石坑湖泊提供水源的一条古河口的沉积物积累而成。 这些图像显示，数十亿年前，当火星的大气层厚到足以支持水在其表面流动时，耶泽罗的扇形河流三角洲经历了晚期的洪水事件，将岩石和碎片从陨石坑外的高地带入其中。 这张沿着...
This NASA/ESA Hubble Space Telescope image features two interacting galaxies that are so intertwined, they have a collective name – Arp 91. Their delicate galactic dance takes place more than 100 million light-years from Earth. The two galaxies comprising Arp 91 have their own names: the lower galaxy, which looks like a bright spot, is NGC 5953, and the oval...
2021年10月8日 The Double Cluster in Perseus Image Credit & Copyright: Jack Groves Explanation: This pretty starfield spans about three full moons (1.5 degrees) across the heroic northern constellation of Perseus. It holds the famous pair of open star clusters, h and Chi Persei. Also cataloged as NGC 869 (top) and NGC 884, both clusters are about 7,000 ligh...
2021年7月，NASA拍摄了在JPL任务组装、测试和发射操作阶段的普赛克航天器。霍尔推进器——其中两个在红色的圆形保护罩下可见——将推动航天器到达其在主小行星带的目标。 影像来源：美国宇航局/JPL-加州理工学院 编者注：普赛克航天器最终飞行的速度，相对于普赛克将使用的氙气量，传统化学推进器需要多少推进剂，都已进行了修正。 当NASA的普赛克航天器为自己提供动力穿越深空的时候，它的工作将更多地由大脑而不是体力来完成。曾经是科幻小说中的东西，高效和安静的电力推进将提供力量，推动普赛克航天器一路到达火星和木星之间的主小行星带。轨道器的目标是一个富含金属的小行星，也叫普赛克。 该航天器将于2022年8月发射，并在三年半的时间里飞行约15亿英里（24亿公里）到达这颗小行星。科学家认为，这可能是一个星子的核心的一部分，...
On Oct. 4, 2021, the seven-member Expedition 65 crew gathered for a portrait inside the vestibule in between the International Space Station’s Unity module and Tranquility module. In the front row from left are; Commander Thomas Pesquet of the European Space Agency; and NASA astronauts Megan McArthur and Shane Kimbrough. In the back are: Roscosmos cosm...
This artist’s conception illustrates a Jupiter-like planet alone in the dark of space, floating freely without a parent star. 这幅艺术家的构思图说明了一颗类似木星的行星在黑暗的太空中独自游荡，没有母星。 Exoplanet hunters have found thousands of planets, most orbiting close to their host stars, but relatively few alien worlds have been detected that float freely through the galaxy as so-cal...
In this image from Sept. 30, 2021, the SpaceX Cargo Dragon resupply ship is pictured as it backs away from the International Space Station’s forward-facing international docking adapter. The Cargo Dragon’s beacon lights and a plume from one of its engines during its departure burn made for a colorful show. 这张摄于2021年9月30日的照片中，货运补给龙飞船从国际空间站的前向国际对接适...