每日一图 | Page 90 of 97

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

NASA·每日一图

进步73号货运飞船离开空间站

ByNASA中文 2019年12月10日2019年12月15日

To make room for the latest cargo craft, on Nov. 29 the Progress 73 departed the station after undocking from the Pirs docking compartment, as shown in this image. Loaded with trash, the craft was deorbited a few hours later and burned up safely over the Pacific Ocean. Traveling approximately 260 miles over the Yellow Sea east of Shanghai, the automated Russian Progress 74 cargo resupply spacecraft docked at 5:35 a.m. EST on Dec. 9 to the Pirs docking compartment on the Russian segment of the International Space Station. It was the second resupply spacecraft to arrive for the six crew members aboard the space station in as many days. Image Credit: NASA 为了给最新的货运飞船腾出空间，11月29日，进步73货运飞船号从Pirs停靠舱脱离后离开了空间站，如图所示。几小时后，装满垃圾的飞船脱离轨道，在太平洋上空安全燃烧。 12月9日美国东部时间上午5点35分，在上海以东约260英里的黄海上空，俄罗斯进步74号货运补给飞船停靠在国际空间站俄罗斯段的Pirs对接舱。这是两天内为国际空间站的六名宇航员提供补给的第二艘飞船。图片来源：NASA

NASA·每日一图

船底座星云的“神秘山”

ByNASA中文 2019年12月5日2019年12月15日

Within the tempestuous Carina Nebula lies “Mystic Mountain.” This three-light-year-tall cosmic pinnacle, imaged by the Hubble Space Telescope’s Wide Field Camera 3 in 2010, is made up primarily of dust and gas, and exhibits signs of intense star-forming activity. The colors in this composite image correspond to the glow of oxygen (blue), hydrogen and nitrogen (green) and sulfur (red). Image Credit: NASA, ESA, M. Livio and the Hubble 20th Anniversary Team (STScI) 在汹涌的船底座星云中坐落着一座“神秘山”。2010年，哈勃太空望远镜的广角相机3号拍摄到了这个三光年高的宇宙尖塔，它主要由尘埃和气体组成，并显示出强烈的恒星形成活动的迹象。这张合成图中的颜色分别代表了氧(蓝色)、氢和氮(绿色)和硫(红色)的辉光。图片来源:NASA, ESA, M. Livio and the Hubble 20th Anniversary Team (STScI)

NASA·每日一图

“机器人旅馆”发射到国际空间站

ByNASA中文 2019年12月4日2019年12月15日

Robots need a place to stay in space, too. NASA is attaching a “robot hotel” to the outside of the International Space Station with the upcoming launch of the Robotic Tool Stowage (RiTS), a protective storage unit for critical robotic tools. On Dec. 4, RiTS is slated to launch aboard the 19th SpaceX commercial resupply mission. Its first residents will be two Robotic External Leak Locators (RELL). Outfitted with mass spectrometers capable of sniffing out the presence of gases such as ammonia, these robotic tools are used to detect leaks from the station. Two RELL units are on board the station right now: the first RELL launched in 2015, and it proved to be such a success that a second RELL was launched as a…