猎户座上空的卫星
(原标题: Satellites over Orion)
2021-06-01
浏览次数: 39
猎户座上空的条纹是什么？它们是无数地球轨道卫星反射的太阳光。包括SpaceX Starlink卫星在内的越来越多的通信卫星在黄昏的天空中以一系列连续的点漂浮在天空中，这引起了许多天文学家的担忧。积极的一面是，星链和类似的星座使日落后的天空更加动态，基于卫星的全球通信更快，并有助于为目前服务不足的农村地区提供数字服务。然而，从消极的一面来看，这些低地球轨道卫星使一些深层天文成像项目变得更加困难，特别是需要在日落之后和黎明之前拍摄图像的观测项目。未来计划在更高轨道上运行的卫星阵列可能会影响大型地面望远镜计划在夜间任何时候进行的深宇宙调查。穿越猎户座的条纹不是来自星链，而是来自高地球同步轨道上的卫星。这张特色照片拍摄于2019年12月，是65张3分钟曝光的数字组合，其中一些照片是为了突出猎户座星云的背景，而另一些则是为了突出经过的卫星。SatCon2研讨会2021年7月12日至16日：减轻卫星星座
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What are those streaks across Orion? They are reflections of sunlight from numerous Earth-orbiting satellites. Appearing by eye as a series of successive points floating across a twilight sky, the increasing number of communications satellites, including SpaceX Starlink satellites, are causing concern among many astronomers. On the positive side, Starlink and similar constellations make the post-sunset sky more dynamic, satellite-based global communications faster, and help provide digital services to currently underserved rural areas. On the negative side, though, these low Earth-orbit satellites make some deep astronomical imaging programs more difficult, in particular observing programs that need images taken just after sunset and just before dawn. Planned future satellite arrays that function in higher orbits may impact investigations of the deep universe planned for large ground-based telescopes at any time during the night. The streaks across Orion are not from Starlink but rather satellites in high geosynchronous orbit. The featured picture, taken in 2019 December, is a digital combination of over 65 3-minutes exposures, with some images taken to highlight the background Orion Nebula, while others to feature the passing satellites. SatCon2 Wokshop 12-16 July 2021: Mitigating Satellite Constellations