首席航天发射系统航空电子工程师艾丽丝-西亚·温斯利

首席航天发射系统航空电子工程师艾丽丝-西亚·温斯利

ByNASA中文

“I was on console as a part of the primary launch team [for Artemis I]. I was the Orion system specialist for Guidance, Navigation, and Control. … In a few missions, we’re sending astronauts to the Moon again, so being a part of the very, very first mission [was memorable]. … I wasn’t here in 2017 when they first began discussions, but that within just the four-year journey, I could see how far we had come: from when we were talking about getting the hardware here, to the hardware arriving, and then [to realize] ‘Oh, it’s going today, we’re going!’ “… From a personal standpoint, I’m a person of faith, so for me, it was like: We launched at night — it was in the…

中国念湖上空的双子座流星雨

中国念湖上空的双子座流星雨

ByNASA中文

2023年12月17日 Geminids over China’s Nianhu Lake Image Credit & Copyright: Hongyang Luo Explanation: Where are all of these meteors coming from? In terms of direction on the sky, the pointed answer is the constellation of Gemini. That is why the major meteor shower in December is known as the Geminids — because shower meteors all appear to come from a radiant toward Gemini. Three dimensionally, however, sand-sized debris expelled from the unusual asteroid 3200 Phaethon follows a well-defined orbit about our Sun, and the part of the orbit that approaches Earth is superposed in front of the constellation of Gemini. Therefore, when Earth crosses this orbit, the radiant point of falling debris appears in Gemini. Featured here is a composite of many images taken a…

蛾眉相的土卫二

蛾眉相的土卫二

ByNASA中文

2023年12月16日 Crescent Enceladus Image Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA Explanation: Peering from the shadows, the Saturn-facing hemisphere of tantalizing inner moon Enceladus poses in this Cassini spacecraft image. North is up in the dramatic scene captured during November 2016 as Cassini’s camera was pointed in a nearly sunward direction about 130,000 kilometers from the moon’s bright crescent. In fact, the distant world reflects over 90 percent of the sunlight it receives, giving its surface about the same reflectivity as fresh snow. A mere 500 kilometers in diameter, Enceladus is a surprisingly active moon. Data and images collected during Cassini’s flybys have revealed water vapor and ice grains spewing from south polar geysers and evidence of an ocean of liquid water hidden beneath…

掩食参宿四

掩食参宿四

ByNASA中文

2023年12月15日 Betelgeuse Eclipsed Image Credit & Copyright: Sebastian Voltmer Explanation: Asteroid 319 Leona cast a shadow across planet Earth on December 12, as it passed in front of bright star Betelgeuse. But to see everyone’s favorite red giant star fade this time, you had to stand near the center of the narrow shadow path starting in central Mexico and extending eastward across southern Florida, the Atlantic Ocean, southern Europe, and Eurasia. The geocentric celestial event is captured in these two panels taken at Almodovar del Rio, Spain from before (left) and during the asteroid-star occultation. In both panels Betelgeuse is seen above and left, at the shoulder of the familiar constellation Orion. Its brightness diminishes noticeably during the exceedingly rare occultation when, for several seconds,…

超新星遗迹仙后A

超新星遗迹仙后A

ByNASA中文

2023年12月14日 Supernova Remnant Cassiopeia A Image Credit: NASA, ESA, CSA, STScI; D. Milisavljevic (Purdue University), T. Temim (Princeton University), I. De Looze (University of Gent) Explanation: Massive stars in our Milky Way Galaxy live spectacular lives. Collapsing from vast cosmic clouds, their nuclear furnaces ignite and create heavy elements in their cores. After only a few million years for the most massive stars, the enriched material is blasted back into interstellar space where star formation can begin anew. The expanding debris cloud known as Cassiopeia A is an example of this final phase of the stellar life cycle. Light from the supernova explosion that created this remnant would have been first seen in planet Earth’s sky about 350 years ago, although it took that light…

2023年回顾: 阿尔忒弥斯2号机组人员访问肯尼迪

2023年回顾: 阿尔忒弥斯2号机组人员访问肯尼迪

ByNASA中文

On Aug. 8, 2023, Artemis II crew members (from left) Jeremy Hansen, Victor Glover, Reid Wiseman, and Christina Koch took a photo in front of their Orion crew module at NASA’s Kennedy Space Center in Florida. Announcing the crew and continuing work on the Space Launch System rocket and Orion are part of the significant steps taken this year toward the agency’s goal of landing the first woman and first person of color on the Moon. Look back on NASA’s achievements in 2023. Image Credit: NASA 2023年8月8日，阿尔忒弥斯2号机组成员(左起)杰里米·汉森、维克多·格洛弗、里德·怀斯曼和克里斯蒂娜·科赫在位于佛罗里达州的NASA肯尼迪航天中心的猎户座机组前拍照。宣布机组人员名单并继续太空发射系统火箭和猎户座的工作是该机构今年为实现第一位女性和第一位有色人种登陆月球的目标而采取的重要步骤的一部分。 回顾NASA在2023年的成就。 影像来源：NASA

深场影像: 心脏星云

深场影像: 心脏星云

ByNASA中文

2023年12月13日 Deep Field: The Heart Nebula Image Credit & Copyright: William Ostling, Telescope Live Explanation: What excites the Heart Nebula? First, the large emission nebula on the left, catalogued as IC 1805, looks somewhat like a human heart. The nebula glows brightly in red light emitted by its most prominent element, hydrogen, but this long-exposure image was also blended with light emitted by silicon (yellow) and oxygen (blue). In the center of the Heart Nebula are young stars from the open star cluster Melotte 15 that are eroding away several picturesque dust pillars with their atom-exciting energetic light and winds. The Heart Nebula is located about 7,500 light years away toward the constellation of Cassiopeia. At the bottom right of the Heart Nebula is the…

韦伯望远镜发现了一颗爆炸的恒星

韦伯望远镜发现了一颗爆炸的恒星

ByNASA中文

NASA’s James Webb Space Telescope’s new view of Cassiopeia A (Cas A) in near-infrared light is giving astronomers hints at the dynamical processes occurring within the supernova remnant. Tiny clumps represented in bright pink and orange make up the supernova’s inner shell, and are comprised of sulfur, oxygen, argon, and neon from the star itself. A large, striated blob at the bottom right corner of the image, nicknamed Baby Cas A, is one of the few light echoes visible NIRCam’s field of view. In this image, red, green, and blue were assigned to Webb’s NIRCam data at 4.4, 3.56, and 1.62 microns (F444W, F356W, and F162M, respectively). NASA, ESA, CSA, STScI, D. Milisavljevic (Purdue University), T. Temim (Princeton University), I. De Looze (University of Gent)…

挪威上空的极光与银河

挪威上空的极光与银河

ByNASA中文

2023年12月12日 Aurora and Milky Way over Norway Image Credit & Copyright: Giulio Cobianchi Explanation: What are these two giant arches across the sky? Perhaps the more familiar one, on the left, is the central band of our Milky Way Galaxy. This grand disk of stars and nebulas here appears to encircle much of the southern sky. Visible below the stellar arch is the rusty-orange planet Mars and the extended Andromeda galaxy. But this night had more! For a few minutes during this cold arctic night, a second giant arch appeared encircling part of the northern sky: an aurora. Auroras are much closer than stars as they are composed of glowing air high in Earth’s atmosphere. Visible outside the green auroral arch is the group of…

宇航员凯瑟琳·桑顿在哈勃太空望远镜上工作

宇航员凯瑟琳·桑顿在哈勃太空望远镜上工作

ByNASA中文

In this image from Dec. 8, 1993, astronaut Kathryn C. Thornton works with equipment during a spacewalk. The spacewalk was part of an 11-day mission, Servicing Mission 1, to service the Hubble Space Telescope. Shortly after Hubble was launched in 1990, NASA discovered a flaw in the observatory’s primary mirror that affected the clarity of the telescope’s early images. Fortunately, Hubble’s design allowed astronauts to perform repairs, replace parts, and update its technology with new instruments while in orbit. Watch an exclusive interview with Thornton, where she shares a firsthand account of the groundbreaking mission, unveiling the challenges, triumphs, and the incredible journey that revitalized Hubble. Image credit: NASA 在这张1993年12月8日的照片中，宇航员凯瑟琳·C·桑顿在太空行走中操作设备。此次太空行走是为期11天的哈勃太空望远镜服务任务1的一部分。1990年哈勃望远镜发射后不久，NASA在天文台的主镜上发现了一个缺陷，影响了望远镜早期图像的清晰度。幸运的是，哈勃的设计使宇航员能够在轨道上进行维修、更换零件，并用新仪器更新其技术。 观看对桑顿的独家采访，她分享了开创性任务的第一手资料，揭示了挑战、胜利和重振哈勃的不可思议的旅程。 影像来源：NASA