几乎无所不包的天空

几乎无所不包的天空

BySamuel Chan

A skyscape is shown over a rocky landscape. In the starry sky are the central band of our Milky Way Galaxy on the left, a meteor trail on the right, the dim band of zodiacal light in the center, and the photographer holding a light just below the center. The path of the light is shown as a bright streak in the bottom part of the frame. Please see the explanation for more detailed information.
一幅星空图展现在岩石地貌之上。星空中，左侧是银河系的中央盘面，右侧是流星轨迹，中央是昏暗的黄道光带，摄影师正手持闪光灯，位于中心正下方。光线的路径在画面底部显示为一条明亮的条纹。有关更多详细信息，请参阅说明。

如何辨识天空的发光体

如何辨识天空的发光体

BySamuel Chan

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

2021年的天空

ByNASA中文

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 columns from these images were then aligned and combined to create the featured keogram, with January at the top, December at the bottom, and the middle of the night running vertically just left of center. What do we see? Most obviously, the daytime sky is mostly blue, while the nighttime sky is mostly black. The twelve light bands crossing the night sky are caused by…