作者: Ken Chan

心宿增四星云的年轻恒星

2019 November 17 Young Stars in the Rho Ophiuchi Cloud Image Credit: NASA, JPL-Caltech, WISE Explanation: How do stars form? To help find out, astronomers created this tantalizing false-color composition of dust clouds and embedded newborn stars in infrared wavelengths with WISE, the Wide-field Infrared Survey Explorer. The cosmic canvas features one of the ...

M16与鹰状星云

2019 November 15 M16 and the Eagle Nebula Image Credit & Copyright: Martin Pugh Explanation: A star cluster around 2 million years young surrounded by natal clouds of dust and glowing gas, M16 is also known as The Eagle Nebula. This beautifully detailed portrait of the region was made with groundbased narrow and broadband image data. It includes cosmic ...

NASA或将实现高精度GPS

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...