保护地球，探索宇宙，发现文明
2022年2月13日 Earth at Night Image Credit: NASA, Suomi NPP VIIRS; Data: Miguel Román (NASA GSFC); Processing: Joshua Stevens Explanation: This is what the Earth looks like at night. Can you find your favorite country or city? Surprisingly, city lights make this task quite possible. Human-made lights highlight particularly developed or populated areas of the Ear...
2022年2月12日 Aurora by Moonlight Image Credit & Copyright: P-M Hedén (Clear Skies, TWAN) Explanation: The ice was singing as light from a bright gibbous Moon cast shadows across this frozen lake, about 20 kilometers north of Stockholm, Sweden, planet Earth. In the alluring night skyscape captured on February 10, shimmering auroral curtains of light dance ...
影像来源：NASA 詹姆斯·韦伯太空望远镜使用近红外相机（NIRCam）校准天文台的主镜，这一耗时数月的过程的第一阶段已接近完成。 该团队面临的挑战有两个：确认NIRCam已经准备好收集来自天体的光，然后在18个主镜段的每个部分中识别来自同一颗恒星的星光。结果是由18个随机组织的星点组成的图像拼接，这是韦伯的非对齐镜面部分的产物，所有来自同一颗恒星的光都反射回韦伯的副镜并进入NIRCam。 该团队的挑战是双重的：确认NIRCam已经准备好收集天体的光线，然后在18个主镜段中的每一个中识别来自同一恒星的星光。结果是一幅由18个随机排列的星光点组成的图像拼图，韦伯望远镜的未对齐镜面将所有来自同一颗恒星的光反射回韦伯望远镜的副镜，并反射到NIRCam的产物。 这张看起来像模糊星光的简单图像，现在成为了校准和聚焦望远镜...
This image from the NASA/ESA Hubble Space Telescope feels incredibly three-dimensional for a piece of deep-space imagery. The image shows Arp 282, an interacting galaxy pair composed of the Seyfert galaxy NGC 169 (bottom) and the galaxy IC 1559 (top). Interestingly, both galaxies have monumentally energetic cores known as active galactic nuclei (AGN), althou...
This view of Jupiter was taken by Voyager 1. This image was taken through color filters, recombined to produce the color image, and assembled from three black and white negatives by the Image Processing Lab at Jet Propulsion Laboratory. The twin Voyager 1 and 2 spacecraft are exploring where nothing from Earth has flown before. Continuing on their more-than-...
2022年2月11日 IC 342: The Hidden Galaxy in Camelopardalis Image Credit & Copyright: Daniel Feller Explanation: Similar in size to large, bright spiral galaxies in our neighborhood, IC 342 is a mere 10 million light-years distant in the long-necked, northern constellation Camelopardalis. A sprawling island universe, IC 342 would otherwise be a prominent gal...
NASA astronaut Mark Vande Hei peers at the Earth below from inside the seven-windowed cupola, the International Space Station’s window to the world. Just outside the cupola is the Soyuz MS-19 crew ship docked to the Rassvet module. Vande Hei is slated to become the U.S. record holder for most time spent in space. He arrived on station on April 9, 2021,...
2022年2月10日 T Tauri and Hind’s Variable Nebula Image Credit & Copyright: Dawn Lowry, Gian Lorenzo Ferretti, Ewa Pasiak and Terry Felty Explanation: The star with an orange tint near top center in this dusty telescopic frame is T Tauri, prototype of the class of T Tauri variable stars. Next to it (right) is a yellow cosmic cloud historically known a...
2022年2月9日 Eta Car: 3D Model of the Most Dangerous Star Known Video Credit: NASA, CXC, April Hobart; Text: Michael F. Corcoran (NASA, Catholic U., HEAPOW) Explanation: What’s the most dangerous star near earth? Many believe it’s Eta Carinae, a binary star system about 100 times the mass of the Sun, just 10,000 light years from earth. Eta Carinae i...
In this image from February 1966, mathematician Daniel G. Nichols, who worked in the Real-Time Program Development Branch, Mission Planning and Analysis Division, is photographed at NASA’s Manned Space Center (now the Johnson Space Center) in Houston. Nichols worked for the agency more than 25 years, including in mission control during the Apollo Program. Ac...