海鷗星雲
The Seagull Nebula

來源:Timothy Martin|發表日期:2025-06-26
來自地球的天文學家們看到了一片由發光氣體和遮蔽塵埃組成的星際廣袤地帶,呈現出鳥兒般的面貌,這也是它的俗稱--海鷗星雲的由來。這幅宇宙大鳥的寬頻畫像覆蓋了銀河系平面上 3 . 5 度寬的區域,位於大犬座(Canis Major)的α星天狼星的方向。海鷗星雲明亮的頭部被編入IC 2177 星表,這是一個緊湊的塵埃狀發射和反射星雲,內嵌大質量恆星HD 53367 。更大的發射區包含了其他星表命名的天體,可能是被連續的超新星爆炸捲起的巨大外殼結構的一部分。下方和中心右側的顯著藍弧是失控恆星 FN 大犬座產生的弓形衝擊。在海鷗星雲約 3800 光年的距離上,這個由星際氣體和塵埃雲以及大犬座 OB 1 聯合體中的其他恆星組成的複合體被原子氫的紅色光芒所覆蓋,其範圍超過 200 光年。
原文:An interstellar expanse of glowing gas and obscuring dust presents a bird-like visage to astronomers from planet Earth, suggesting its popular moniker, the Seagull Nebula. This broadband portrait of the cosmic bird covers a 3.5-degree wide swath across the plane of the Milky Way, in the direction of Sirius, alpha star of the constellation of the Big Dog (Canis Major). The bright head of the Seagull Nebula is cataloged as IC 2177, a compact, dusty emission and reflection nebula with embedded massive star HD 53367. The larger emission region, encompassing objects with other catalog designations, is Likely part of an extensive shell structure swept up by successive supernova explosions. The notable bluish arc below and right of center is a bow shock from runaway star FN Canis Majoris. Dominated by the reddish glow of atomic hydrogen, this complex of interstellar gas and dust clouds with other stars of the Canis Majoris OB1 association spans over 200 light-years at the Seagull Nebula's estimated 3,800 light-year distance.
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