NASA·每日一图 | Page 125 of 146

雪花星团

ByGotthew 2019年12月26日2019年12月26日

Newborn stars, hidden behind thick dust, are revealed in this image of a section of the so-called Christmas Tree Cluster from NASA’s Spitzer Space Telescope. The newly revealed infant stars appear as pink and red specks toward the center and appear to have formed in regularly spaced intervals along linear structures in a configuration that resembles the spokes of a wheel or the pattern of a snowflake. Hence, astronomers have nicknamed this the “Snowflake Cluster.” Star-forming clouds like this one are dynamic and evolving structures. Since the stars trace the straight line pattern of spokes of a wheel, scientists believe that these are newborn stars, or “protostars.” At a mere 100,000 years old, these infant structures have yet to “crawl” away from their location of…

NASA·每日一图

哈勃太空望远镜的螺旋盘隆起特写

ByNASA中文 2019年12月21日

This image from the NASA/ESA Hubble Space Telescope shows IC 2051, a galaxy in the southern constellation of Mensa (the Table Mountain) lying about 85 million light-years away. It is a spiral galaxy, as evidenced by its characteristic whirling, pinwheeling arms, and it has a bar of stars slicing through its center. This galaxy was observed for a Hubble study on galactic bulges, the bright round central regions of spiral galaxies. Spiral galaxies like IC 2051 are shaped a bit like flying saucers when seen from the side; they comprise a thin, flat disk, with a bulky bulge of stars in the center that extends above and below the disk. These bulges are thought to play a key role in how galaxies evolve, and to…

NASA·每日一图

NASA历史上的本周：哈勃太空望远镜第三次维修任务——1999年12月19日

ByNASA中文 2019年12月20日

This week in 1999, space shuttle Discovery, mission STS-103, launched from NASA’s Kennedy Space Center on the third Hubble Space Telescope servicing mission. Over the course of three planned extravehicular activities, the STS-103 crew restored Hubble to working order and upgraded some of its systems, allowing the then decade-old observatory to get ready to begin its second scheduled decade of astronomical observations. Hubble was released from Discovery’s cargo bay Dec. 24. Here, astronauts Michael Foale and Claude Nicollier install a Fine Guidance Sensor into a protective enclosure in the shuttle’s payload bay. The NASA History Program is responsible for generating, disseminating and preserving NASA’s remarkable history and providing a comprehensive understanding of the institutional, cultural, social, political, economic, technological and scientific aspects of NASA’s activities…

NASA·每日一图

星系聚集带来温暖

ByNASA中文 2019年12月19日2019年12月19日

As the holiday season approaches, people in the northern hemisphere will gather indoors to stay warm. In keeping with the season, astronomers have studied two groups of galaxies that are rushing together and producing their own warmth. The majority of galaxies do not exist in isolation. Rather, they are bound to other galaxies through gravity either in relatively small numbers known as “galaxy groups,” or much larger concentrations called “galaxy clusters” consisting of hundreds or thousands of galaxies. Sometimes, these collections of galaxies are drawn toward one another by gravity and eventually merge. Using NASA’s Chandra X-ray Observatory, ESA’s XMM-Newton, the Giant Metrewave Radio Telescope (GMRT), and optical observations with the Apache Point Observatory in New Mexico, a team of astronomers has found that two…

NASA·每日一图

Dextre机械手的Canadarm2机械臂

ByNASA中文 2019年12月19日

iss061e077393 (Dec. 12, 2019) — The Canadarm2 robotic arm with the Dextre robotic hand attached seemingly protrudes from the side of the International Space Station as the orbiting complex soared 263 miles above the South Pacific Ocean. iss061e077393(2019年12月12日)——当环绕地球飞行的国际空间站在南太平洋上空263英里的高空飞行时，附有Dextre机械手的Canadarm2机械臂似乎从国际空间站一侧伸出来。

NASA·每日一图

休斯敦，得克萨斯州墨西哥湾沿岸

ByNASA中文 2019年12月18日

iss061e066684 (Dec. 3, 2019) — Houston, Texas is pictured from the International Space Station at an altitude of 257 miles. The bodies of water (from top to bottom) are the Gulf of Mexico, Galveston Bay, Lake Houston, Lake Conroe and Lake Livingston. iss061e066684(2019年12月3日)——国际空间站在海拔257英里的德克萨斯州休斯顿拍摄的照片。水体(从上到下)是墨西哥湾、加尔维斯顿湾、休斯顿湖、康罗湖和利文斯顿湖。

NASA·每日一图

哈勃望远镜拍摄到了银河系令人眼花缭乱的景象

ByNASA中文 2019年12月15日2019年12月15日

NGC 3175 is located around 50 million light-years away in the constellation of Antlia (the Air Pump). The galaxy can be seen slicing across the frame in this image from the NASA/ESA Hubble Space Telescope, with its mix of bright patches of glowing gas, dark lanes of dust, bright core, and whirling, pinwheeling arms coming together to paint a beautiful celestial scene. The galaxy is the eponymous member of the NGC 3175 group, which has been called a nearby analog for the Local Group. The Local Group contains our very own home galaxy, the Milky Way, and around 50 others — a mix of spiral, irregular and dwarf galaxies. The NGC 3175 group contains a couple of large spiral galaxies — the subject of this…

NASA·每日一图

为国际空间站的第一批宇航员送上一份祝福

ByNASA中文 2019年12月13日2019年12月15日

In this image from December 2000, the Expedition One crew–the first to permanently inhabit the International Space Station–are about to eat a treat of fresh oranges onboard the Zvezda Service Module. Pictured, from the left, are Soyuz commander Yuri P. Gidzenko, Station commander William M. Shepherd and cosmonaut Sergei K. Krikalev. For 19 years and counting, the station has operated as an international partnership that is as much a human achievement as it is a technological one and an exercise in how best to plan, coordinate, and monitor the varied activities of the program’s many organizations. #TBT Image Credit: NASA 在这张2000年12月的照片中，第一批永久居住在国际空间站的“远征一号”宇航员正准备在茨韦兹达服务舱上享用新鲜的橙子。从左至右依次是联盟号指挥官Yuri P. Gidzenko，空间站指挥官William M. Shepherd和宇航员Sergei K. Krikalev。在过去的19年里，国际空间站一直作为一种国际伙伴关系来运作，这既是一项技术成就，也是一项人类的成就，也是一项如何最好地规划、协调和监测项目众多组织的各种活动的实践。 # TBT 图片来源:美国国家航空航天局

NASA·每日一图

璀璨的夜空：黑暗中的美洲

ByNASA中文 2019年12月12日2019年12月15日

This image of North and South America at night is a composite assembled from data acquired by the Suomi NPP satellite in April and October 2012. The new data was mapped over existing Blue Marble imagery of Earth to provide a realistic view of the planet. For more such images of our planet, read Earth at Night, NASA’s latest ebook that features dazzling photographs and images from space of Earth’s nightlights. For nearly 25 years, satellite images of Earth at night have served as a fundamental research tool, while also stoking public curiosity. The images paint an expansive and revealing picture, showing how humans have illuminated and shaped the planet in profound ways since the invention of the light bulb 140 years ago. This image’s…

NASA·每日一图

地球变化中的冰川

ByNASA中文 2019年12月11日2019年12月15日

Meltwater lakes form on the surface of Greenland’s Petermann Glacier, seen here in a June 2019 Landsat image. A new study finds that the number – and elevation – of meltwater lakes in Greenalnd is increasing. How do scientists know? Earth’s glaciers and ice sheets as seen from space – some spanning nearly 50 years – are providing scientists with new insights into how the planet’s frozen regions are changing. Learn More: Ice in Motion: Satellites Capture Decades of Change Image Credit: NASA/USGS 在2019年6月的地球资源卫星图片中，格陵兰岛的彼得曼冰川表面形成了融水湖。一项新的研究发现，格陵兰岛融水湖的数量正在增加，融水湖的海拔也在增高。科学家是怎么知道的?从太空中看到的地球冰川和冰原——其中一些跨越了近50年——为科学家提供了了解地球冰冻区域如何变化的新视角。了解更多:冰川的运动:卫星拍摄到的数十年的变化影像来源：NASA/USGS