飛向仙女座的藍色弧線
Blue Arcs Toward Andromeda

來源:Ogle et
al.|發表日期:2025-08-04
仙女座星系(M 31 )附近這些巨大的藍色弧線是什麼? 這些被稱為 SDSO 1 的微弱弧線於 2022 年被業餘天文學家發現,其角度大小几乎與 M 31 本身相同。 起初,它們的起源還是一個謎:它們究竟是靠近仙女座星系,還是靠近我們的太陽? 現在,超過 550 個小時的聯合曝光以及業餘和專業天文學家的合作揭示了它們真實性質的有力證據:SDSO 1 並非銀河系,而是我們銀河系中的一類新的行星狀星雲。 SDSO 1 被稱為幽靈行星狀星雲(GPN),是新的褪色行星狀星雲亞類中第一個被確認的成員,最近還發現了其他七個亞類。 藍色顯示的是衝擊波產生的極其微弱的氧發射,而周圍的紅色則是氫發射軌跡,表明了GPN 的年齡。
原文:What are these gigantic blue arcs near the Andromeda Galaxy (M31)? Discovered in 2022 by amateur astronomers, the faint arcs -- dubbed SDSO 1 -- span nearly the same angular size as M31 itself. At first, their origin was a mystery: are they actually near the Andromeda Galaxy, or alternatively near to our Sun? Now, over 550 hours of combined exposure and a collaboration between amateur and professional astronomers has revealed strong evidence for their true nature: SDSO 1 is not intergalactic, but a new class of planetary nebula within our galaxy. Dubbed a Ghost Planetary Nebula (GPN), SDSO 1 is the first recognized member of a new subclass of faded planetary nebulas, along with seven others also recently identified. Shown in blue are extremely faint oxygen emission from the shock waves, while the surrounding red is a hydrogen-emitting trail that indicates the GPN's age.
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