APOD251230 人造彗星
人造彗星
图像提供与版权: Wang Chao[1]
英文原文: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 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[2]的尾巴[3]。 这张照片巧妙地叠加[4]了一组卫星[5]在六月绕地球[6]运行的缩时摄影串行[7]。 具体来说,这些是位于近地轨道[8]的星链[9]通信卫星,它们在日出前将阳光反射回中国[10]内蒙古[11]。 虽然这些卫星在人眼[12]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[13]。 目前,已有超过9000颗星链卫星[14]在轨运行,几乎每周都有新的卫星发射[15]升空。 其他卫星星系[16]也正在规划中。
探索宇宙: 随机每日天文图产生器[17]
明日的图片: celestial waterfall[18]
Authors & editors: Robert Nemiroff[19] (MTU[20]) & Jerry Bonnell[21] (UMCP[22])
NASA Official: Amber Straughn Specific rights apply[23].
NASA Web Privacy[24], Accessibility[25], Notices[26];
A service of: ASD[27] at NASA[28] / GSFC[29],
NASA Science Activation[30]
& Michigan Tech. U.[31]
太空天文实验室(成功大学物理系)
<br/> 编辑:<a href="mailto:hantzong.su@gmail.com" style="color:gray;" target="_blank">苏汉宗</a>
编辑:陈炳志[32]
[1]mailto: 17662361764 at 163 dot com
[2]https://science.nasa.gov/solar-system/comets/
[3]http://apod.nasa.gov/apod/ap250128.html
[4]https://i.ytimg.com/vi/npW2t0aDMrY/hq720.jpg
[5]http://apod.nasa.gov/apod/ap250614.html
[6]https://science.nasa.gov/earth/earth-observatory/
[7]http://apod.nasa.gov/apod/image/2512/ArtificialComet_Chao.mp4
[8]https://www.nasa.gov/humans-in-space/leo-economy-frequently-asked-questions/
[9]https://starlink.com/technology
[10]https://en.wikipedia.org/wiki/China
[11]https://youtu.be/KagBk62Digg
[12]https://en.wikipedia.org/wiki/Human_eye
[13]http://apod.nasa.gov/apod/ap230107.html
[15]http://apod.nasa.gov/apod/ap251015.html
[16]https://en.wikipedia.org/wiki/Satellite_internet_constellation
[17]https://apod.nasa.gov/apod/random_apod.html
[18]http://apod.nasa.gov/apod/ap251231.html
[19]http://www.phy.mtu.edu/faculty/Nemiroff.html
[21]https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
[23]http://apod.nasa.gov/apod/lib/about_apod.html#srapply
[24]https://www.nasa.gov/about/highlights/HP_Privacy.html
[25]https://www.nasa.gov/general/accessibility/
[26]https://www.nasa.gov/privacy/
[27]https://astrophysics.gsfc.nasa.gov/
[29]https://www.nasa.gov/centers/goddard/
[30]https://science.nasa.gov/learners
[32]mailto:alfred@ncku.edu.tw
http://apod.nasa.gov/apod/ap251230.html
http://sprite.phys.ncku.edu.tw/astrolab/mirrors/apod/ap251230.html