保护地球，探索宇宙，发现文明
NASA’s Juno mission captured this look at Jupiter’s tumultuous northern regions during the spacecraft’s close approach to the planet on Feb. 17, 2020. Notable features in this view are the long, thin bands that run through the center of the image from top to bottom. Juno has observed these long streaks since its first close pass by Jupiter ...
2020 May 16 The Dark River to Antares Composite Image Credit & Copyright: Paul Schmit Explanation: A dark river seems to flow through this sky from the horizon toward colorful clouds near red giant star Antares. Murky looking, the dark river is a dusty nebula obscuring background starlight near the central Milky Way, although the dark dust nebula contai...
毅力号火星漫游车遥感桅杆的头部特写。桅杆头部包含超级分析相机（SuperCam，它的镜头位于顶部较大的圆形开口中）。桅杆头下方的灰色框，有两个桅杆变焦相机系统。在这些成像仪的外侧，还有漫游车的两个导航相机（NavCam）。 图片来源：NASA/喷气推进实验室-加州理工 再过两个多月，美国航天航空局（NASA）的毅力号（Perseverance）火星漫游者就要发射升空了，它将拥有有史以来最先进的“眼睛”，对这颗“红色星球”（Red Planet）的表面进行观察。桅杆变焦相机系统（Mastcam-Z，Z在这里代表“zoom”，即变焦）具有下一代变焦功能，这能让毅力号任务更轻松地进行3D成像。火星车的操作员仔细规划了毅力号的每条行驶路线，以及车上机械臂的每一次移动，他们将能通过3D眼镜查看这些立体图像，观察火星上独特...
2020 May 15 Galaxy Wars: M81 and M82 Image Credit & Copyright: Dietmar Hager, Torsten Grossmann Explanation: These two galaxies are far far away, 12 million light-years distant toward the northern constellation of the Great Bear. On the left, with grand spiral arms and bright yellow core is spiral galaxy M81, some 100,000 light-years across. On the righ...
Northrup Grumman’s Cygnus resupply ship, with its prominent cymbal-shaped UltraFlex solar arrays, is pictured in the grips of the Canadarm2 robotic arm moments before its release ending its 83-day stay at the International Space Station on May 11, 2020. Within 24 hours of its release, Cygnus began its secondary mission, hosting the Spacecraft Fire Safe...
2020 May 14 Comet Halley vs Comet SWAN Image Credit & Copyright: Luc Perrot (TWAN) Explanation: The pre-dawn hours of May 3rd were moonless as grains of cosmic dust streaked through southern skies above Reunion Island. Swept up as planet Earth plowed through dusty debris streams left behind periodic Comet 1/P Halley, the annual meteor shower is known as...
2015年，当新视野号宇宙飞船经过冥王星时，它的图像显示出的众多迷人特征之一是，这个遥远的太阳系中寒冷的小星球有着朦胧的大气层。现在，新的数据有助于解释冥王星的薄雾是如何形成的，它是由37亿英里以外的太阳在不寻常的轨道上移动时形成的。 NASA的红外天文平流层观测台(SOFIA)在飞机上对冥王星进行的远程观测表明，笼罩冥王星的薄薄的薄雾是由非常小的粒子构成的，这些粒子在大气中停留很长一段时间，而不是立即落到冥王星表面上。SOFIA的数据表明，这些薄雾颗粒正在得到积极补充——这一发现修正了冥王星大气层在环绕太阳的248年轨道上进入更寒冷的太空时的命运预测。研究结果发表在科学杂志《伊卡洛斯》上。 “冥王星是一个神秘的天体，总是令人惊讶，”论文的第一作者、麻省理工学院华莱士天体物理观测所所长迈克尔·珀尔说。“在早期的...
Iowa native astronaut Raja Chari was selected by NASA to join the 2017 Astronaut Candidate Class. He is a graduate of the U.S. Air Force Academy with bachelor’s degrees in astronautical engineering and engineering science, and later earned a master’s degree in aeronautics and astronautics from Massachusetts Institute of Technology. In addition, he graduated ...
2020 May 13 Jupiter in Infrared from Gemini Image Credit: International Gemini Observatory, NOIRLab, NSF, AURA; M. H. Wong (UC Berkeley) & Team; Acknowledgment: Mahdi Zamani; Text: Alex R. Howe (NASA/USRA, Reader’s History of SciFi Podcast) Explanation: In infrared, Jupiter lights up the night. Recently, astronomers at the Gemini North Observatory...
Several hundred million years ago, two galaxy clusters collided and then passed through each other. This mighty event released a flood of hot gas from each galaxy cluster that formed an unusual bridge between the two objects. This bridge is now being pummeled by particles driven away from a supermassive black hole. Galaxy clusters are the largest objects in ...