保护地球，探索宇宙，发现文明
2022年1月31日 Carina Nebula North Image Credit & Copyright: Roberto Colombari Explanation: The Great Carina Nebula is home to strange stars and iconic nebulas. Named for its home constellation, the huge star-forming region is larger and brighter than the Great Orion Nebula but less well known because it is so far south — and because so much of humani...
2022年1月30日 A Solar Prominence from SOHO Image Credit: NASA, ESA, SOHO-EIT Consortium Explanation: How can gas float above the Sun? Twisted magnetic fields arching from the solar surface can trap ionized gas, suspending it in huge looping structures. These majestic plasma arches are seen as prominences above the solar limb. In 1999, this dramatic and detailed...
科学家们反复检查天气预报，为飞机的飞行做准备，并在最后一刻检查科学仪器。一场巨大的冬季风暴即将来临，但这正是这些追逐风暴的科学家们所希望的。 该团队正在NASA的两架飞机上追踪美国中西部和东部的风暴，这两架飞机配备了科学仪器，以帮助了解冬季风暴形成和发展的内部机制。该团队正在驾驶两架飞机调查冬季风暴，一架在风暴上方，一架在云层内。每个都配备了一套科学仪器，用于收集有关雪粒及其形成条件的数据。这些实验是NASA第二次部署大西洋海岸威胁风暴（IMPACTS）微物理和降水调查任务的一部分，该任务于1月开始，计划于2月底结束。 这些数据将帮助团队将雪粒及其环境的特性与大尺度过程联系起来，比如云层结构和降水模式，这些过程可以通过飞机和卫星上的遥感仪器看到。最终，IMPACTS团队对暴风雪的了解将改善气象模型，提高我们使用...
2022年1月29日 The Fornax Cluster of Galaxies Image Credit & Copyright: Marco Lorenzi, Angus Lau, Tommy Tse Explanation: Named for the southern constellation toward which most of its galaxies can be found, the Fornax Cluster is one of the closest clusters of galaxies. About 62 million light-years away, it is almost 20 times more distant than our neighboring...
In this image taken in 1985, four members of the Challenger STS-51L crew – Michael J. Smith, left, Ellison S. Onizuka, Judith A. Resnik, and Francis R. “Dick” Scobee – train on the flight deck of the shuttle crew compartment. 在1985年拍摄的这张照片中，挑战者号STS-51L机组的四名成员——迈克尔·J·史密斯（左）、埃里森·S·奥尼苏卡、朱迪思·A·雷斯尼克和弗朗西斯·R·迪克·斯科比在航天飞机机组人员舱的飞行甲板上接受训练。 Just 73 seconds after launch ...
2022年1月28日 Western Moon, Eastern Sea Image Credit & Copyright: Tom Glenn Explanation: The Mare Orientale, Latin for Eastern Sea, is one of the most striking large scale lunar features. The youngest of the large lunar impact basins it’s very difficult to see from an earthbound perspective. Still, taken during a period of favorable tilt, or libratio...
In this June 1966 photo, the Apollo 1 crew practices water egress procedures with a full scale boilerplate model of the spacecraft. In the water at right are astronauts Ed White and Roger Chaffee (foreground). In raft near the spacecraft is astronaut Gus Grissom. NASA swimmers are in the water to assist in the practice session that took place at Ellington AF...
Much like the sky, rivers are rarely painted one color. Rivers around the world appear in shades of yellow, green, blue, and brown—and subtle changes in the environment can alter their colors. 就像天空一样，河流很少被涂成一种颜色。世界各地的河流呈现出黄色、绿色、蓝色和棕色的色调——环境的细微变化会改变它们的颜色。 New research shows the dominant color has changed in about one-third of large rivers in the continental U...
This colorized schlieren image is of a small-scale model of NASA’s X-59 Quiet SuperSonic Technology (QueSST) airplane taken inside NASA Glenn Research Center’s 8- by- 6-foot Supersonic Wind Tunnel during a recent boom test. The multiple-week campaign produced data sets and shockwave visuals that engineers from the agency’s Commercial Supersonic Technology pr...
2022年1月27日 South of Orion Image Credit & Copyright: Vikas Chander Explanation: South of the large star-forming region known as the Orion Nebula, lies bright blue reflection nebula NGC 1999. At the edge of the Orion molecular cloud complex some 1,500 light-years distant, NGC 1999’s illumination is provided by the embedded variable star V380 Orionis...