保护地球，探索宇宙，发现文明
This image of North and South America at night is a composite assembled from data acquired by the Suomi NPP satellite in April and October 2012. The new data was mapped over existing Blue Marble imagery of Earth to provide a realistic view of the planet. For more such images of our planet, read Earth at Night, NASA’s latest ebook that features dazzling...
2019 December 12 Decorating the Sky Image Credit & Copyright: Leonardo Julio (Astronomia Pampeana) Explanation: Bright stars, clouds of dust and glowing nebulae decorate this cosmic scene, a skyscape just north of Orion’s belt. Close to the plane of our Milky Way galaxy, the wide field view spans about 5.5 degrees. Striking bluish M78, a reflection...
从太空中拍摄到的地球冰川和冰原的新延时视频——有些已有近50年历史——为科学家提供了了解地球冰冻区域变化的新视角。 从太空中拍摄的地球冰川和冰原的新延时视频跨越了近50年，为科学家们提供了了解地球冰冻区域变化的新视角。 来源：NASA / Matt Radcliff 在12月9日于旧金山举行的美国地球物理联合会年会上的一次新闻发布会上，科学家使用来自包括NASA-U.S. 地球资源探测卫星(Landsat)任务在内的卫星数据发布了阿拉斯加，格陵兰和南极洲的新时间序列图像。一系列的图片说明了阿拉斯加冰川的巨大变化，并可能警告未来哈伯德冰川的消退。在格陵兰岛，不同的卫星记录显示，从2000年开始，冰川消退速度加快，而在过去十年里，融水湖向更高的海拔蔓延，这可能会加速冰的流动。在南极的冰架上，从太空中可以看到隐藏在冬...
Meltwater lakes form on the surface of Greenland’s Petermann Glacier, seen here in a June 2019 Landsat image. A new study finds that the number – and elevation – of meltwater lakes in Greenalnd is increasing. How do scientists know? Earth’s glaciers and ice sheets as seen from space – some spanning nearly 50 years – are providing scientists with new insights...
2019 December 11 N63A: Supernova Remnant in Visible and X-ray Image Credit: NASA, ESA, Hubble, Chandra; Processing & License: Judy Schmidt Explanation: What has this supernova left behind? As little as 2,000 years ago, light from a massive stellar explosion in the Large Magellanic Cloud (LMC) first reached planet Earth. The LMC is a close galactic neighb...
To make room for the latest cargo craft, on Nov. 29 the Progress 73 departed the station after undocking from the Pirs docking compartment, as shown in this image. Loaded with trash, the craft was deorbited a few hours later and burned up safely over the Pacific Ocean. Traveling approximately 260 miles over the Yellow Sea east of Shanghai, the automated Russ...
2019 December 10 Starlink Satellite Trails over Brazil Image Credit & Copyright: Egon Filter Explanation: What are those streaks over the horizon? New Starlink satellites reflecting sunlight. SpaceX launched 60 Starlink communication satellites in May and 60 more in November. These satellites and thousands more are planned by communications companies in ...
2019 December 9 Looking Sideways from the Parker Solar Probe Video Credit: NASA, JHUAPL, Naval Research Lab, Parker Solar Probe Explanation: Everybody sees the Sun. Nobody’s been there. Starting in 2018 though, NASA launched the robotic Parker Solar Probe (PSP) to investigate regions near to the Sun for the first time. The PSP’s looping orbit bri...
2019 December 8 Geminid Meteors over Chile Image Credit & Copyright: Yuri Beletsky (Carnegie Las Campanas Observatory, TWAN) Explanation: Are meteors streaming out from a point in the sky? Yes, in a way. When the Earth crosses a stream of Sun-orbiting meteors, these meteors appear to come from the direction of the stream — with the directional poin...
版权：NASA 国际空间站（International Space Station）外又添新的冷却系统；首次靠近太阳的探测器首次发布数据结果；猎户座（Orion）飞船准备接受重要测试……最近新闻速递，尽在「本周NASA」！ 12月2日，美国航空航天局（NASA）的安德鲁•摩根（Andrew Morgan）和欧洲空间局（ESA）的卢卡•帕米塔诺（Luca Parmitano）在国际空间站外进行了一次太空行走，这是为整修阿尔法磁谱仪（Alpha Magnetic Spectrometer，AMS）的一系列太空行走中的第三次。AMS是一种宇宙粒子探测器，本次太空行走中，宇航员为AMS安装了新的冷却系统，地球上的控制团队在安装之后成功为其供电。 此前从未有航天器近距离飞掠太阳，而帕克太阳探测器（Parker Solar...