2019 October 18 Interstellar Interloper 2I/Borisov Image Credit: NASA, ESA, and D. Jewitt (UCLA) et al. Explanation: After the 2017 detecton of 1I/’Oumuamua, comet 2I/Borisov has become the second recognized interstellar interloper. Like ‘Oumuamua, Borisov’s measured hyperbolic tra […]
In the high desert of California, some of the most important aircraft in aviation history have been built and flown. NASA’s X-59 QueSST (short for Quiet SuperSonic Technology) is an experimental piloted aircraft designed to fly faster than sound without producing the annoying – if not alarming – son
2019 October 11 Planet Earth at Blue Hour Image Credit & Copyright: Matthias Ciprian Explanation: Nature photographers and other fans of planet Earth always look forward to the blue hour. That’s the transition in twilight, just before sunrise or after sunset, when the Sun is below the hor
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 reflecte
来源:ESA 通过5G网络，在任何地方任意时间将人和机器连接到任何事物，有望可以改变社会。人们将能够访问为满足他们即时需求而开发的信息和服务，但若要实现无缝连接，除了地面网络，还需要卫星网络。 欧洲航天局（ESA）正在与一些热衷于开发和使用太空支持的无缝5G连接的公司进行合作，来开发无处不在的5G服务。在9月24日至26日于新港举行的英国航天会议（UK Space Conference）上，ESA展示了在英国航天局（UKSA）的支持下与几家英国公司的合作成果。 这些公司正在开发各式各样的应用，从自动驾驶船舶到联网汽车和无人机送货、从货运物流到紧急服务、从媒体和广播到金融服务的各种应用。 Spi
最近，美国航空航天局（NASA）已经与位于科罗拉多州博尔德市的高级航天公司（Advanced Space）签订了一份价值1,370万美元（约9770万人民币）的商业合同，用于开发和运行一项月球轨道立方体卫星（CubeSat）任务，其运行轨道将与“门户”（Gateway）相同。“门户”是一个轨道前哨站，在NASA阿尔忒弥斯计划（Artemis program）的登录系统降落月球表面之前，宇航员将会首先访问“门户”。 月地空间自主定位系统技术操作与导航实验（Cislunar Autonomous Positioning System Technology Operations and Naviga
2019 September 29 MyCn 18: The Engraved Hourglass Planetary Nebula Image Credit: NASA, ESA, Hubble; Processing & License: Judy Schmidt Explanation: Do you see the hourglass shape — or does it see you? If you can picture it, the rings of MyCn 18 trace the outline of an hourglass — al
2019 September 28 An Analemma of the Sun Image Credit & Copyright: Gyorgy Soponyai Explanation: This week the equinox found the Sun near the middle, but not at the crossing point, of an analemma in its annual trek through planet Earth’s skies. In this scenic view, that graceful, figure-8-
黑洞的最新可视化展示了黑洞的重力如何扭曲我们的视线及其周围的环境，就像在哈哈镜中看到的那样。可视化效果模拟了黑洞的外观：落入黑洞的物质积聚在一个又薄又热的结构中，称为吸积盘（accretion disk）。 随着磁场在气体的搅动中缠绕并扭曲，明亮的“结点”不断在吸积盘中形成并消散。最靠近黑洞的位置气体以接近光速运转，而外部速度更慢。这种速度差拉伸并剪切了这些明亮的“结点”，在吸积盘中产生了或明或暗的路线。 从侧面看，在黑洞周围的气体湍流呈现出神奇的双峰状外观。黑洞的极端重力会改变来自吸积盘不同部分的光的路径，从而产生这般扭曲的图像。侧视时扭曲的程度最大。 Credits: NASA’s God
