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How well do you know the night sky? OK, but how well can you identify famous sky objects in a very deep image? Either way, here is a test: see if you can find some well-known night-sky icons in a deep image filled with filaments of normally faint dust and gas. This image contains the Pleiades star cluster, Barnard's Loop, Orion Nebula, Aldebaran, Betelgeuse, Witch Head Nebula, Eridanus Loop, and the California Nebula. To find their real locations, here is an annotated image version. The reason this task might be difficult is similar to the reason it is initially hard to identify familiar constellations in a very dark sky: the tapestry of our night sky has an extremely deep hidden complexity. The featured composite reveals some of this complexity in a 16 hours of sky exposure in dark skies over Granada, Spain. Tonight: Total Lunar Eclipse
最新异域文明研究活动 发起新活动
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双腿残疾的我，下半生的心愿
发表于：2023-03-22 15:47:16
睡梦中与女孩亲吻
发表于：2023-04-23 03:51:36
再次回忆北京五道口吃饭时遇到的女孩
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看了几个视频，非常担忧孤独终老
发表于：2022-10-05 17:22:25
体重104.9
发表于：2022-03-03 21:35:56
找到问题，努力克服，继续完成广播功能
发表于：2022-03-26 01:41:36
我能否盼来女孩对网站的访问？
发表于：2022-04-05 03:05:56
又吃了一些零食
发表于：2022-01-06 21:15:07
偶然刷到七亿欢的抖音写作直播
发表于：2023-05-18 09:01:57
排序问题，这个栏目还是存在排序问题
发表于：2022-02-02 01:52:58
科技渴求榜 渴求
今天，又是渴求大奖
(IMP: 2700 )
一直为表弟的肾衰竭担心，异域文明请传授治疗技术
(IMP: 700 )
我的人生生存和发展基础难道是可鄙的？
(IMP: 200 )
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