M 31 :仙女座星系
M31: The Andromeda Galaxy
來源:R. Gendler &
R. Croman|發表日期:2024-09-08
最遙遠的天體是M 31 ,即仙女座大星系。即使在大約 250 萬光年的距離上,也能看到這個巨大的螺旋星系--跨度超過 20 萬光年--儘管它只是仙女座中一團微弱的星雲。在這幅令人驚歎的望遠鏡影像中,記錄了明亮的黃色星核、暗色蜿蜒的塵埃通道,以及點綴著藍色星團和紅色星雲的廣闊旋臂。再過大約 50 億年,仙女座星系就會與我們的銀河系融為一體或擦肩而過,屆時它可能會橫跨整個夜空,更容易被人看到。 教師和學生:在課堂上使用 APOD 的想法
原文:The most distant object easily visible to the unaided eye is M31, the great Andromeda Galaxy. Even at some two and a half million light-years distant, this immense spiral galaxy -- spanning over 200,000 light years -- is visible, although as a faint, nebulous cloud in the constellation Andromeda. A bright yellow nucleus, dark winding dust lanes, and expansive spiral arms dotted with blue star clusters and red nebulae, are recorded in this stunning telescopic image which combines data from orbiting Hubble with ground-based images from Subaru and Mayall. In only about 5 billion years, the Andromeda galaxy may be even easier to see -- as it will likely span the entire night sky -- just before it merges with, or passes right by, our Milky Way Galaxy. Teachers & Students: Ideas for using APOD in the classroom
※ 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。