紅藍相間的昴宿星團
The Pleiades in Red and Blue
來源：Ogetay Kayali
(Michigan Tech U.)
Text:
Ogetay Kayali
(Michigan Tech U.)｜發表日期：2025-07-08
如果你曾仰望天空，看到一群和滿月差不多大小的星星，那就是昴宿星團（M 45 ）。它可能是天空中最有名的星團，即使在光汙染嚴重的城市裡也能看到它最亮的星星。不過，在黑暗的天空中，你的肉眼也能看到它的星雲物質--它周圍的氣體和塵埃。然而，望遠鏡可以捕捉到更多。昴宿星團（又稱七姊妹星）明亮的藍色恆星照亮了周圍的塵埃，使塵埃呈現出一種只有在長時間曝光下才能看到的漫反射藍色。但這還不是全部。宇宙塵埃看起來像虛無縹緲的手臂一樣向上伸展。整個結構被宇宙中最豐富的元素--氫--所發出的紅光所包圍。這張特寫圖片由近 25 個小時的曝光組成，是去年從美國德克薩斯州的星鋒天文臺拍攝的：隨機 APOD 生成器
原文：If you have looked at the sky and seen a group of stars about the size of the full Moon, that's the Pleiades (M45). Perhaps the most famous star cluster in the sky, its brightest stars can be seen even from the light-polluted cities. But your unaided eye can also see its nebulosity -- the gas and dust surrounding it -- under dark skies. However, telescopes can catch even more. The bright blue stars of the Pleiades, also known as the Seven Sisters, light up their surrounding dust, causing it to appear a diffuse blue that can only be seen under long exposures. But that's not all. The cosmic dust appears to stretch upward like ethereal arms. And the entire structure is surrounded by a reddish glow from the most abundant element in the universe: hydrogen. The featured image is composed of nearly 25 hours of exposure and was captured last year from Starfront Observatory, in Texas, USA Explore Your Universe: Random APOD Generator
※ 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。