标签: sky

如何辨识天空的发光体

An illustration is shown which is a decision tree for identifying a light that might be seen in the sky. The background is gray, and the text is black in red-lined boxes. Please see the explanation for more detailed information.
图表展示了一个决策树的图示,用于识别天空中可能出现的光。背景为灰色,文本以红色边框方框呈现。有关更多详细信息,请参阅说明。

2021年的天空

2022年3月21日 The Sky in 2021 Image Credit & Copyright: Cees Bassa (Netherlands Institute for Radio Astronomy) Explanation: What if you could see the entire sky — all at once — for an entire year? That, very nearly, is what is pictured here. Every 15 minutes during 2021, an all-sky camera took an image of the sky over the Netherlands. Central c...