莫赫上空的光柱與獵戶座
Light Pillars and Orion over Mohe
來源：Jeff Dai
(TWAN)｜發表日期：2026-03-23
那條街的盡頭發生了什麼？圖中呈現的並非極光，而是光柱——一種通常發生在更近距離的現象。在地球上的大多數地方，幸運的觀測者都能看到日柱，即從太陽上方延伸而出的光柱，這是由於扁平的、飄動的冰晶反射了來自高層大氣的陽光所致。 通常，這些冰晶在到達地面之前就會蒸發。然而，在嚴寒天氣下，扁平飄動的冰晶可能會在地面附近形成，有時被稱為“晶霧”。這些微小的冰晶隨後反射的可能不是陽光，而是地面的燈光。這張特色圖片不僅捕捉到了無數的光柱，還拍到了標誌性的獵戶座，拍攝地點位於中國最北端的城市——鄂渓。
原文：What's happening at the end of that street? Pictured here are not auroras but light pillars, a phenomenon typically much closer. In most places on Earth, a lucky viewer can see a Sun pillar, a column of light appearing to extend up from the Sun caused by flat fluttering ice-crystals reflecting sunlight from the upper atmosphere. Usually, these ice crystals evaporate before reaching the ground. During freezing temperatures, however, flat fluttering ice crystals may form near the ground and are sometimes known as a crystal fog. These small ice crystals may then reflect not the Sun but ground lights. The featured image captured not only numerous light pillars but also the iconic constellation of Orion, and was taken in Mohe, the northernmost city in China.
※ 本文由萌芽機器人自動轉貼自每日一天文圖（Astronomy Picture of the Day，APOD），原文為英文，正體中文是透過 DeepL 翻譯及 OpenCC 進行自動處理，內容僅供參考，若有任何錯誤之處還請見諒！
關於每日一天文圖：每日一天文圖網站是美國國家航空暨太空總署與密西根理工大學提供的服務，網站每天提供一張影像或圖片，並由天文學家撰寫扼要說明其特別之處。