标签： 光污染

天文·每日一图

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人为的夜空亮度

2023年3月8日 Artificial Night Sky Brightness Image Credit: Data: JPSS Satellites; Processing: David J. Lorenz Explanation: Where have all the dim stars gone? From many places on the Earth including major cities, the night sky has been reduced from a fascinating display of thousands of stars to a diffuse glow through which only a few stars are visible. The featu...

天文·每日一图

 由 

乡村与都市夜空的对比

2020 April 8 Country Sky versus City Sky Image Credit & Copyright: Tomas Slovinsky; Text: Matipon Tangmatitham (NARIT) Explanation: Dark skies are disappearing from the world. With modernization comes artificial lighting that brightens the night. While these lights allow modern humans to see, much light is wasted up into the sky. This light pollution no...