神奇望远镜上空的NEOWISE彗星
2020年7月24日
MAGIC NEOWISE
Image Credit & Copyright: Urs Leutenegger
Explanation: The multi-mirror, 17 meter-diameter MAGIC telescopes reflect this starry night sky from the Roque de los Muchachos European Northern Observatory on the Canary Island of La Palma. MAGIC stands for Major Atmospheric Gamma Imaging Cherenkov and the telescopes can see the brief flashes of optical light produced in particle air showers as high-energy gamma rays impact the Earth’s upper atmosphere. On July 20, two of the three telescopes in view were looking for gamma rays from the center of our Milky Way galaxy. In reflection they show the bright stars of Sagittarius and Scorpius near the galactic center to the southeast. Beyond the segmented-mirror arrays, above the northwest horizon and below the Big Dipper is Comet NEOWISE. NEOWISE stands for Near Earth Object Wide-field Infrared Survey Explorer. That’s the Earth-orbiting satellite used to discover the comet designated C/2020 F3, but you knew that.
Notable Images of Comet NEOWISE Submitted to APOD: July 23 || 22 || 21 || 20 || 19 || 18 || 17 || 16 || 15 || 14 || 13 || 12 || 11 || 10 & earlier ||
Tomorrow’s picture: from a rotating planet
神奇望远镜上空的NEOWISE彗星
影像提供与版权: Urs Leutenegger
说明: 这部隶属加那利群岛·拉帕尔马岛·欧北天文台·穆查丘斯罗克天文台的多重镜片17米口径之神奇望远镜，正在反映这片夜空。神奇望远镜是”大型大气伽玛射线契伦科夫望远镜”的简称，其功能在于侦测高能伽玛射线轰击地球高层大气时，所产生的空气粒子射丛诱发之可见光亮闪。在7月20日拍摄这幅影像里，位在视野里3部望远镜中的2部，正在寻找源自我们银河系核心的伽玛射线。镜面上的倒影，则是在东南方银河中心方向的人马座和天蝎座内的亮星。分节镜面望远镜阵列的后方，在西北地平线上方和北斗七星下方的则是NEOWISE彗星。不过，你必然知道”NEOWISE”是近地小天体广视野红外巡天卫星的缩写，而这颗卫星就在今年的3月，发现编录号为C/2020 F3的NEOWISE彗星。 （MAGIC; Major Atmospheric Gamma-ray Imaging Cherenkov Telescopes 大型大气伽玛射线契伦科夫望远镜、神奇望远镜）
提交给APOD的NEOWISE彗星的著名图像：7月 23日 || 22日 || 21日 || 20日 || 19日 || 18日 || 17日 || 16日 || 15日 || 14日 || 13日 || 12日 || 11日 || 10日或更早 ||
明日的图片: from a rotating planet