树木

天文·每日一图

覆雪森林上空的双子座流星雨

A snowy landscape is pictured below a starry sky. The very bright Moon appears on the upper right. Many streaks are visile that are meteors taken over the night. Please see the explanation for more detailed information.
照片下方是一片雪景,星空下是明亮的月亮,位于右上方。可以看到许多流星痕,都是那天夜晚拍摄的。有关更多详细信息,请参阅说明。

天文·每日一图

加拿大萨斯喀彻温省上空的乳状云

2021年8月11日 Mammatus Clouds over Saskatchewan Image Credit & Copyright: Michael F Johnston Explanation: When do cloud bottoms appear like bubbles? Normally, cloud bottoms are flat. This is because moist warm air that rises and cools will condense into water droplets at a specific temperature, wh

天文·每日一图

树梢框住的银河系

2021年7月19日 Framed by Trees: A Window to the Galaxy Image Credit & Copyright: Will Godward Explanation: The photographer had this shot in mind for some time. He knew that objects overhead are the brightest — since their light is scattered the least by atmospheric air. He also that knew the

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