2025年12月30日
An Artificial Comet
Image Credit & Copyright: Wang Chao
Explanation: Yes, but can your comet tail do this? No, and what you are seeing is not the tail of a comet. The picture features a cleverly overlayed time-lapse sequence of a group of satellites orbiting Earth together in June. Specifically, these are Starlink communications satellites in low Earth orbit reflecting back sunlight before sunrise to Inner Mongolia, China. Although the satellites appear to the human eye as points, the 20-second-long camera exposures caused them to appear as short streaks. Currently there are over 9000 Starlinks in orbit, with more being launched nearly every week. Other satellite constellations are also being planned.
Explore the Universe: Random APOD Generator
Tomorrow’s picture: celestial waterfall
人造彗星
影像提供与版权: Wang Chao
说明: 是的，但你的彗星尾巴能做到这一点吗？不，您所看到的并不是彗星的尾巴。这张照片巧妙地叠加了一组卫星在六月绕地球运行的缩时摄影序列。具体来说，这些是位于近地轨道的星链通讯卫星，它们在日出前将阳光反射回中国 内蒙古。虽然这些卫星在人眼中看起来像是点，但由于相机曝光时间长达20秒，它们看起来像是短条纹。目前，已有超过9000颗星链卫星在轨运行，几乎每周都有新的卫星发射升空。其他卫星星系也正在规划中。
探索宇宙: 随机APOD产生器
明日的图片: celestial waterfall
