馬頭星雲和火焰星雲
The Horsehead and Flame Nebulas

來源:Daniel Stern|發表日期:2025-09-02
馬頭星雲是天空中最著名的星雲之一。 在特寫圖片的最右邊,橙色發射星雲的暗色凹陷處可以看到它。 馬頭星雲之所以是黑的,是因為它實際上是位於明亮的發射星雲前面的不透明塵埃雲。就像地球大氣層中的雲層一樣,這團宇宙雲也是在偶然的情況下形成了可識別的形狀。 數千年後,雲的內部運動肯定會改變它的外觀。 發射星雲的橙色是由電子與質子重新結合形成氫原子造成的。 影像左下方是火焰星雲,它是一個橙色的星雲,也包含著錯綜複雜的暗色塵埃絲。
原文:The Horsehead Nebula is one of the most famous nebulae on the sky. It is visible as the dark indentation to the orange emission nebula at the far right of the featured picture. The horse-head feature is dark because it is really an opaque dust cloud that lies in front of the bright emission nebula. Like clouds in Earth's atmosphere, this cosmic cloud has assumed a recognizable shape by chance. After many thousands of years, the internal motions of the cloud will surely alter its appearance. The emission nebula's orange color is caused by electrons recombining with protons to form hydrogen atoms. Toward the lower left of the image is the Flame Nebula, an orange-tinged nebula that also contains intricate filaments of dark dust.
※ 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!
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