透视土卫六

透视土卫六

ByNASA中文

2023年3月31日 Seeing Titan Image Credit: VIMS Team, U. Arizona, U. Nantes, ESA, NASA Explanation: Shrouded in a thick atmosphere, Saturn’s largest moon Titan really is hard to see. Small particles suspended in the upper atmosphere cause an almost impenetrable haze, strongly scattering light at visible wavelengths and hiding Titan’s surface features from prying eyes. But Titan’s surface is better imaged at infrared wavelengths where scattering is weaker and atmospheric absorption is reduced. Arrayed around this visible light image (center) of Titan are some of the clearest global infrared views of the tantalizing moon so far. In false color, the six panels present a consistent processing of 13 years of infrared image data from the Visual and Infrared Mapping Spectrometer (VIMS) on board the Cassini spacecraft…

NASA的履带式运输车2号创下纪录

NASA的履带式运输车2号创下纪录

ByNASA中文

Guinness World Records officially designated NASA’s Crawler Transporter 2 as the heaviest self-powered vehicle, weighing approximately 6.65 million pounds—equivalent to about 15 Statues of Liberty or 1,000 pickup trucks. During a March 29, 2023, ceremony at NASA’s Kennedy Space Center in Florida, Guinness World Records presented a certificate to teams with the Exploration Ground Systems Program and Kennedy leadership. Part of the crawler can be seen in the background of this photo taken the same day. Image Credit: NASA/Isaac Watson 吉尼斯世界纪录正式指定美国宇航局的履带式运输车2号为最重的自供动力交通工具，重约665万磅，相当于大约15座自由女神像或1,000辆皮卡。2023年3月29日，在佛罗里达州NASA肯尼迪航天中心举行的仪式上，吉尼斯世界纪录向探索地面系统计划和肯尼迪领导的团队颁发了证书。在当天拍摄的这张照片的背景中可以看到运输车的一部分。 影像来源：NASA/Isaac Watson

NGC 4372与暗带星云

NGC 4372与暗带星云

ByNASA中文

2023年3月30日 NGC 4372 and the Dark Doodad Image Credit & Copyright: Matias Tomasello Explanation: The delightful Dark Doodad Nebula drifts through southern skies, a tantalizing target for binoculars toward the small constellation Musca, The Fly. The dusty cosmic cloud is seen against rich starfields just south of the Coalsack Nebula and the Southern Cross. Stretching for about 3 degrees across the center of this telephoto field of view, the Dark Doodad is punctuated near its southern tip (upper right) by yellowish globular star cluster NGC 4372. Of course NGC 4372 roams the halo of our Milky Way Galaxy, a background object some 20,000 light-years away and only by chance along our line-of-sight to the Dark Doodad. The Dark Doodad’s well defined silhouette belongs to the…

Crew-4的博物馆实地考察之旅

Crew-4的博物馆实地考察之旅

ByNASA中文

NASA astronauts Kjell Lindgren, left, Jessica Watkins, center, and Bob Hines, right, take in the view from the interactive recreation of the International Space Station’s cupola in the One World Connected gallery at the Smithsonian’s National Air and Space Museum on March 28, 2023. Lindgren, Watkins, and Hines spent 170 days in space as part of Expeditions 67 and 68 aboard the International Space Station; while aboard the orbital laboratory, they conducted maintenance on the space station as well as science experiments. Image Credit: NASA/Joel Kowsky 2023年3月28日，NASA宇航员科杰尔·林德格伦（左）、杰西卡·沃特金斯（中）和鲍勃·海因斯（右）在史密森尼国家航空航天博物馆的“同一个世界连接”画廊里观看国际空间站圆顶的互动重现。作为国际空间站第67号和第68号远征队的一员，林德格伦、沃特金斯和海因斯在太空中度过了170天；在轨道实验室期间，他们对空间站进行了维护和科学实验。 影像来源：NASA/Joel Kowsky

SH2-308: 海豚状的恒星气泡

SH2-308: 海豚状的恒星气泡

ByNASA中文

2023年3月29日 Sh2-308: A Dolphin Shaped Star Bubble Image Credit & Copyright: Aleix Roig (AstroCatInfo) Explanation: Which star created this bubble? It wasn’t the bright star on the bubble’s right. And it also wasn’t a giant space dolphin. It was the star in the blue nebula’s center, a famously energetic Wolf-Rayet star. Wolf-Rayet stars in general have over 20 times the mass of our Sun and expel fast particle winds that can create iconic looking nebulas. In this case, the resulting star bubble spans over 60 light years, is about 70,000 years old, and happens to look like the head of a dolphin. Named Sh2-308 and dubbed the Dolphin-Head Nebula, the gas ball lies about 5,000 light years away and covers as much sky as the…

照片档案员和摄影师奥布里·杰米尼亚尼

照片档案员和摄影师奥布里·杰米尼亚尼

ByNASA中文

“People aren’t always recognized for who they are at work. “So giving a person time to actually talk about themselves, and be proud of what they do, and talk about how hard it might be to maintain their career with everything else going on — makes them feel valued and appreciated. And highlighting them in that way on the Faces of NASA page, makes that pride permanent. “I think I’m always seeking out projects that help people feel seen. And maybe that’s why I got so into photography initially. I struggle with that myself — feeling seen. And so to help other people feel seen is definitely an interest of mine that I keep coming back to.” — Aubrey Gemignani, Photo Archivist/Photographer, Co-founder of Faces…

落日的多重绿闪

落日的多重绿闪

ByNASA中文

2023年3月28日 A Multiple Green Flash Sunset Image Credit & Copyright: T. Slovinský & P. Horálek (IoP Opava); CTIO, NOIRLab, NSF, AURA Explanation: Yes, but can your green flash do this? A green flash at sunset is a rare event that many Sun watchers pride themselves on having seen. Once thought to be a myth, a green flash is now understood to occur when the Earth’s atmosphere acts like both a prism and a lens. Different atmospheric layers create altitude-variable refraction that takes light from the top of the Sun and disperses its colors, creates two images, and magnifies it in just the right way to make a thin sliver appear green just before it disappears. Pictured, though, is an even more unusual sunset. From the…