魯賓銀河
Rubin's Galaxy
發表日期：2025-06-13
在這幅哈勃太空望遠鏡拍攝的影像中，明亮的尖頂恆星位於英勇的北方英仙座的前景，在我們的銀河系內。UGC 2885 是一個巨大的螺旋星系，距離我們約 2 . 32 億光年。它的直徑約為 80 萬光年，而銀河系的直徑只有 10 萬光年左右，它擁有大約 1 萬億顆恆星。這大約是銀河系恆星數量的 10 倍。UGC 2885 也是美國天文學家維拉-魯賓（Vera Rubin）的 "有趣的旅行"（An Interesting Voyage）的一部分，她對螺旋星系的旋轉進行了開創性的研究。她的研究首次令人信服地證明了暗物質在我們宇宙中的主導地位。為了紀念維拉-魯賓，美國發行了一枚新硬幣，而維拉-魯賓天文臺（Vera C. Rubin Observatory）計劃於 6 月 23 日公佈其首次觀測宇宙的影像。
原文：In this Hubble Space Telescope image the bright, spiky stars lie in the foreground toward the heroic northern constellation Perseus and well within our own Milky Way galaxy. In sharp focus beyond is UGC 2885, a giant spiral galaxy about 232 million light-years distant. Some 800,000 light-years across compared to the Milky Way's diameter of 100,000 light-years or so, it has around 1 trillion stars. That's about 10 times as many stars as the Milky Way. Part of an investigation to understand how galaxies can grow to such enormous sizes, UGC 2885 was also part of An Interesting Voyage and American astronomer Vera Rubin's pioneering study of the rotation of spiral galaxies. Her work was the first to convincingly demonstrate the dominating presence of dark matter in our universe. A new U.S. coin has been issured to honor Vera Rubin, while the Vera C. Rubin Observatory is scheduled to unveil images from its first look at the cosmos on June 23.
※ 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。