美国宇航局的洞察号火星着陆器利用着陆器甲板下的仪器背景照相机，在日落时分拍摄了这颗红色星球上漂浮的云层。这张照片拍摄于2019年4月25日，也就是火星探测任务的第145天，也就是太阳活动日，从下午6点半左右开始。火星当地时间。 NASA’s InSight Mars Lander used its Instrument Context Camera beneath the lander’s deck to image these drifting clouds at sunset on the Red Planet. This image was taken on April 25, 2019, the 145th Martian day, or sol, of the mission, starting at around 6:30 p.m. Mars local time. Image Credit: NASA
今天是教师节!美国宇航局宇航员瑞奇·阿诺德曾在马里兰州华尔多夫的约翰·汉森中学担任科学教师，在成为宇航员之前，他曾在沙特阿拉伯、摩洛哥、印度尼西亚和罗马尼亚做过教学工作。他还是一名海洋生物学家，在获得硕士学位后，他花了一年的时间从事海洋科学工作，包括在科德角国家海岸以及总部设在马萨诸塞州伍兹霍尔的航海训练/海洋研究船工作。 2019年5月3日，星期五，在马里兰州六旗美国主题公园的史密森国家航空航天博物馆制作STEM项目期间，阿诺德回答了观众关于他在国际空间站上度过的时间的问题。在空间站期间，阿诺德在空间站外完成了三次太空行走，总共19.5个小时。2018年10月，他乘坐联盟号飞船在哈萨克斯坦哲兹卡兹甘镇着陆，结束了为期197天的任务。他还乘坐航天飞机STS-119飞往空间站，运送最后一对发电的太阳能电池板。 Today is National Teacher Day! NASA astronaut Ricky Arnold was a science teacher at John Hanson Middle School in Waldorf, Maryland, and had teaching gigs in Saudi Arabia, Morocco, Indonesia and Romania all before becoming an astronaut. He is also a marine biologist who, upon receiving his master’s degree, spent a year working in the Marine Sciences including time at the Cape Cod National Seashore and aboard a sail training/oceanographic vessel headquartered in Woods Hole, Massachusetts. In this image, Arnold answers questions from the audience about his time onboard the International Space Station during a Smithsonian National Air and Space Museum production of STEM in 30, Friday, May 3, 2019, at Six Flags America theme park in Maryland. During his time on the…
5月4日星期六，SpaceX公司的龙飞船搭载猎鹰9号火箭从佛罗里达州卡纳维拉尔角空军基地的航天发射场40号发射升空，携带了超过5500磅的研究、设备、货物和物资，将为国际空间站上的数十项调查提供支持。5月6日，星期一，当空间站在北大西洋上空飞行时，加拿大航天局的宇航员大卫·圣雅克和美国宇航局的尼克·黑格在美国东部时间早上7点01分用空间站的机械臂Canadarm2抓住了龙飞船。 SpaceX’s Dragon lifted off on a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida on Saturday, May 4, with more than 5,500 pounds of research, equipment, cargo and supplies that will support dozens of investigations aboard the International Space Station. On Monday, May 6, while the station was traveling over the north Atlantic Ocean, astronauts David Saint-Jacques of the Canadian Space Agency and Nick Hague of NASA grappled Dragon at 7:01 a.m. EDT using the space station’s robotic arm, Canadarm2. Image Credit: SpaceX
宇宙中很少有居民像螺旋星系那样具有标志性。这些引人注目的天体结合了旋转的旋臂、旋转的旋臂、闪烁的星星的散射、炽热的气体爆发以及黑暗的宇宙尘埃织成的车道，创造了真正令人敬畏的场景——尤其是通过美国宇航局/欧洲航天局的哈勃太空望远镜观察时。事实上，这张哈勃望远镜拍摄的图像构成了一个完美的螺旋标本:令人惊叹的NGC 2903。 NGC 2903位于离我们约3000万光年远的狮子座(狮子座)，它是哈勃对附近145个碟状星系中心区域进行调查的一部分。这项研究的目的是帮助天文学家更好地理解潜伏在这些星系核心的黑洞与星系中心的橄榄球球形状的恒星、气体和尘埃膨胀之间的关系，如图所示。 Few of the universe’s residents are as iconic as the spiral galaxy. These limelight-hogging celestial objects combine whirling, pinwheeling arms with scatterings of sparkling stars, glowing bursts of gas, and dark, weaving lanes of cosmic dust, creating truly awesome scenes — especially when viewed through a telescope such as the NASA/ESA Hubble Space Telescope. In fact, this image from Hubble frames a perfect spiral specimen: the stunning NGC 2903. NGC 2903 is located about 30 million light-years away in the constellation of Leo (the Lion), and was studied as part of a Hubble survey of the central regions of roughly 145 nearby disk galaxies. This study aimed to help astronomers better understand the relationship between the black holes that lurk at…
气象卫星每天要进行数十万次大气探测，收集数据进行预报。使用这种方法的开创性想法可以追溯到20世纪50年代末，当时地球观测卫星是一项全新的技术。 在美国国家航空航天局位于马里兰州格林贝尔特的戈达德太空飞行中心和加利福尼亚喷气推进实验室工作的科学家刘易斯卡普兰(Lewis Kaplan)开发了一种计算大气温度的方法，用于天气预报:通过测量不同海拔高度的分子振动。 快进60年,卡普兰的观点在他的具有里程碑意义的1959年的论文,题目是“远程辐射测量的大气结构推断”，保持大气探测的核心，这是一种称为探测器的仪器垂直探测天空的过程。有关温度，湿度和水蒸气的详细信息，揭示了地球大气层的微妙变化。美国国家航空航天局(NASA)和美国国家海洋和大气管理局(NOAA)在测深仪的技术开发方面处于领先地位。 这张图片是艺术家对NASA的Nimbus-3太空船的渲染。它于1969年发射，是一系列气象卫星中的第三颗。 How Atmospheric Sounding Transformed Weather Prediction Each day, weather satellites take hundreds of thousands of atmospheric soundings to gather data for forecasting. The groundbreaking idea of using this method dates to the late 1950’s, when Earth-observing satellites were a brand-new technology. Scientist Lewis Kaplan, who worked at NASA’s Goddard Space Flight Center in Greenbelt, Maryland and Jet Propulsion Laboratory in California, developed a way to calculate temperature in the atmosphere for weather forecasting: by measuring the vibration of molecules at different altitudes. Fast forward 60 years, and the ideas that Kaplan laid out in his landmark 1959 paper entitled, “Inference of Atmospheric Structure from Remote Radiation Measurements,” remain at the heart of atmospheric sounding, the process by which instruments called…
NASA的洞察号火星探测器在2019年4月25日，也就是任务的第145个火星日，使用其机械臂末端的仪器部署摄像头(IDC)拍摄了这幅火星日落的照片。这张照片拍摄于火星当地时间下午6点半左右。 这个颜色校正版本更准确地显示了人眼所能看到的图像。查看“原始”和颜色校正图像。 第一个发回这类图像的任务是海盗1号火星探测器，它在1976年8月21日捕捉到了日落；海盗2号于1978年6月14日拍摄到了日出。从那时起，“勇气号”、“机遇号”和“好奇号”等探测器都记录了日出和日落。 美国宇航局喷气推进实验室为该机构的科学任务理事会管理洞察。洞察号火星探测器是NASA发现计划的一部分，由位于阿拉巴马州亨茨维尔的马歇尔太空飞行中心管理。洛克希德·马丁太空公司在丹佛建造了洞察号飞船，包括它的巡航器和着陆器，并支持飞船执行任务。 InSight Lander Captures a Sunset on Mars NASA’s InSight lander used the Instrument Deployment Camera (IDC) on the end of its robotic arm to image this sunset on Mars on April 25, 2019, the 145th Martian day, or sol, of the mission. This was taken around 6:30 p.m. Mars local time. This color-corrected version more accurately shows the image as the human eye would see it. See both the “raw” and color-corrected images. The first mission to send back such images was the Viking 1 lander, which captured a sunset on Aug. 21, 1976; Viking 2 captured a sunrise on June 14, 1978. Since then, both sunrises and sunsets have been recorded by the Spirit, Opportunity and Curiosity rovers, among other…
轨道碳观测台3或OCO-3，位于喷气推进实验室环境测试实验室的大振动台(称为“振动台”)上。暴露的电线连接到用于动态和热真空测试的传感器。隔热层将被添加到肯尼迪航天中心的仪器上，携带OCO-3的SpaceX龙飞船计划将其发射到国际空间站。 当轨道上的碳观测站OCO-3前往国际空间站时，它将为研究地球的碳循环带来一个全新的视角。在空间站上，OCO-3将从日出后到日落前观测陆地和海洋上二氧化碳的准全球测量值。这使得它比它的前辈更加多才多艺，更加强大。 OCO-3太空仪器是OCO-2的直接继承者，后者自2014年以来一直在研究二氧化碳分布和探测排放热点和火山。 The Orbiting Carbon Observatory 3, or OCO-3, sits on the large vibration table (known as the “shaker”) in the Environmental Test Lab at the Jet Propulsion Laboratory. The exposed wires lead to sensors used during dynamics and thermal-vacuum testing. Thermal blankets will be added to the instrument at Kennedy Space Center, where a Space-X Dragon capsule carrying OCO-3 is slated to launch it to the International Space Station. When the Orbiting Carbon Observatory 3, OCO-3, heads to the International Space Station, it will bring a new view — literally — to studies of Earth’s carbon cycle. From its perch on the space station, OCO-3 will observe near-global measurements of carbon dioxide on land and sea, from just after sunrise to just before…
美国国家航空和宇宙航行局的“机遇号”探测器的最终导线地图显示了“机遇号”于2018年6月10日在“毅力谷”的位置，这是它最后一次与工程团队取得联系。 在这张地图上可以看到一条黄色的横贯路线，起点是“机遇号”的着陆点鹰坑，全长28.06英里(45.16公里)，终点位于奋进号陨石坑边缘。当沙尘暴结束探测器的任务时，它正在下降到坚忍谷的火山口。 This final traverse map for NASA’s Opportunity rover shows where the rover was located within Perseverance Valley on June 10, 2018, the last date it made contact with its engineering team. Visible in this map is a yellow traverse route beginning at Opportunity’s landing site, Eagle Crater, and ranging 28.06 miles (45.16 kilometers) to its final resting spot on the rim of Endeavour Crater. The rover was descending down into the crater in Perseverance Valley when the dust storm ended its mission. Image Credit: NASA/JPL-Caltech/MSSS
这个闪耀的恒星群是Messier 75。它是一个球状星团:一个由引力结合在一起的恒星的球形集合。像这样的集群绕着星系运行，通常位于它们外围和不太拥挤的区域，聚集在星系郊区形成密集的社区。 Messier 75位于我们的银河系人马座(射手座)，距离地球约67,000光年。该星系团的大多数恒星(约40万颗)位于其核心;它是迄今为止发现的人口密度最大的星团之一，亮度是太阳的18万倍。难怪它拍得这么好! 1780年，皮埃尔·梅凯因发现了Messier 75，同年晚些时候，查尔斯·梅西耶也发现了Messier 75，并将其列入了他的目录。这张Messier 75的照片是由美国宇航局/欧洲航天局哈勃太空望远镜的高级巡天照相机拍摄的。 Messier 75出现在哈勃的梅西耶目录中，其中包括一些可以从地球北半球观测到的最迷人的物体。请参阅NASA处理的图像和其他Messier对象：https：//www.nasa.gov/content/goddard/hubble-s-messier-catalog。 This sparkling burst of stars is Messier 75. It is a globular cluster: a spherical collection of stars bound together by gravity. Clusters like this orbit around galaxies and typically reside in their outer and less-crowded areas, gathering to form dense communities in the galactic suburbs. Messier 75 lies in our Milky Way galaxy in the constellation of Sagittarius (the Archer), around 67,000 light-years away from Earth. The majority of the cluster’s stars, about 400,000 in total, are found in its core; it is one of the most densely populated clusters ever found, with a phenomenal luminosity of some 180,000 times that of the Sun. No wonder it photographs so well! Discovered in 1780 by…
2019年4月22日，国际空间站的工作人员在加拿大上空258英里的轨道上环绕哈德逊湾，拍摄了这张位于安大略和魁北克之间的哈德逊湾冰川南端的照片。 On April, 22, 2019, the crew aboard the International Space Station snapped this image of the Hudson Bay’s frozen southern tip, which lies in between Ontario and Quebec, as the Space Station orbited 258 miles above Canada. Image Credit: NASA
