保护地球，探索宇宙，发现文明
2019 October 7 Io Eclipse Shadow on Jupiter from Juno Image Credit & License: NASA/JPL-Caltech/SwRI/MSSS; Processing: Kevin M. Gill Explanation: What’s that dark spot on Jupiter? It’s the shadow of Jupiter’s most volcanic moon Io. Since Jupiter shines predominantly by reflected sunlight, anything that blocks that light leaves a shadow....
美国国家航空航天局（NASA）的喷气推进实验室（Jet Propulsion Laboratory, JPL）在全球定位系统（GPS）的早期就参与了相关研究，因为JPL的研究人员有追踪类星体（宇宙中最明亮的天体）发出的无线电信号的经验。 版权：NASA / 欧洲航天局（ESA） 通过NASA开发的算法和软件，你能够导航到达距离你三英寸之内的离目的地。这使得NASA系统增强了由美国空军GPS卫星提供的原始导航信号，以支持世界各地的飞机导航、应急响应人员指挥，并将很快可以实现自动驾驶汽车导引。 美国空军从1978年开始发射全球定位卫星，直至今日仍在继续运营和维护卫星网络。但在过去的几十年里，NASA在改善我们日常生活所依赖的GPS系统方面发挥了至关重要的作用。 GPS卫星在地球上空数千英里的轨道上运行，这意味着当它...
2019 October 6 The Horsehead Nebula Image Credit & Copyright: José Jiménez Priego Explanation: The Horsehead Nebula is one of the most famous nebulae on the sky. It is visible as the dark indentation to the red emission nebula in the center of the above photograph. The horse-head feature is dark because it is really an opaque dust cloud that lies in fron...
Cosmologist Stephen Hawking changed our view of the universe with his remarkable theories and outreach. He also inspired generations around the world, making some of the most complicated physics of our time accessible to the masses. He also suffered from amyotrophic lateral sclerosisor, or ALS, also known as Lou Gehrig’s disease, which gradually paraly...
NASA astronaut Nick Hague is seen outside the Soyuz MS-12 spacecraft after he landed with fellow crewmember Alexey Ovchinin of Roscosmos and visiting astronaut Hazzaa Ali Almansoori of the United Arab Emirates in a remote area near the town of Zhezkazgan, Kazakhstan on Thursday, Oct. 3, 2019. Hague and Ovchinin are returning after 203 days in space where the...
2019 October 5 Jupiter and the Moons Image Credit & Copyright: Derek Demeter (Emil Buehler Planetarium) Explanation: After sunset on October 3, some of the Solar System’s largest moons stood low along the western horizon with the largest planet. Just after nightfall, a pairing of the Moon approaching first quarter phase and Jupiter was captured in ...
2019 October 4 InSight on a Cloudy Day Image Credit: NASA, JPL-Caltech, Mars InSight Explanation: Clouds drift through the sky as the light fades near sunset in this three frame animated gif. The scene was captured on sol 145 beginning around 6:30pm local time by a camera on the Mars InSight lander. Of course, InSight’s martian day, sol 145, correspond...
视频来源：NASA 2020年，阿尔忒弥斯计划（Artemis program）的第一阶段Artemis I将引领我们开启月球到火星人类探索。而在今年7月，猎户座（Orion）飞船的搭建工作已圆满完成，也已完美通过了大部分测试，即将前往俄亥俄州进入最终的主测试阶段，主测试完成后，猎户座飞船就能与空间发射系统（Space Launch System，SLS）的火箭整合，进行万众期待的关键性发射。 在美国航空航天局（NASA）位于俄亥俄州桑达斯基的梅溪观测站（Plum Brook Station）站中，有着世界一流的太空环境测试设施，即空间环境综合体系（Space Environments Complex，SEC），其中包括：最大的太空模拟真空室、功能最强大的航天器声学测试室，以及世界上容量最大、功能最强的航天器振...
2019 October 3 The Hydrogen Clouds of M33 Image Data: Subaru Telescope (NAOJ), Hubble Space Telescope – Image Processing: Robert Gendler Additional Data: BYU, Robert Gendler, Johannes Schedler, Adam Block – Copyright: Robert Gendler, Subaru Telescope, NAOJ Explanation: Gorgeous spiral galaxy M33 seems to have more than its fair share of glowing h...
这片太空中的云团由气体和尘埃组成，其中充满了气泡，这些气泡被来自年轻的大质量恒星的风和辐射所胀大。每个气泡直径约10至30光年，里面充满了成百上千颗恒星。该区域位于银河系的“阿奎拉”星座（Aquila，即天鹰座）。 版权：美国国家航空航天局（NASA）/ 喷气推进实验室-加州理工学院（JPL-Caltech） 这张来自NASA斯皮策太空望远镜（Spitzer Space Telescope）的红外图像显示了由气体和尘埃组成的云，其中充满了由年轻的大质量恒星的风和辐射所胀大的气泡。每个气泡中都充满了成百上千颗恒星，这些恒星由稠密的气体和尘埃云形成。 根据天文学家对它们以及其他宇宙气泡的了解，这些气泡的直径估计在10至30光年之间。然而，确定单个气泡的确切大小是很困难的，因为它们与地球的距离很难测量，而且离地球越远...