Copyright:Timothy Martin
中文翻譯:
在廣闊的星際空間中，一片發光氣體和遮擋塵埃形成了一個鳥類的面貌，這讓來自地球的天文學家給它取了個流行的別名：海鷗星雲。這幅廣場幅的宇宙鳥的圖像覆蓋了3.5度寬的銀河系平面，朝向天狼星，也就是大犬座（Canis Major）的阿爾法星。海鷗星雲亮麗的頭部編號為IC 2177，這是一個緊湊的、充滿塵埃的發射和反射星雲，內部嵌入了大質量恆星HD 53367。這個更大的發射區域包含其他目錄編號的天體，很可能是由於接連的超新星爆炸所形成的廣泛殼結構。位於中心下方右側的顯著藍色弧形是逃逸恆星FN Canis Majoris的衝擊波。這片以原子氫的紅色光芒為主導的星際氣體和塵埃雲複合體，以及其他屬於大犬座OB1星協的恆星，跨越200光年，距離海鷗星雲估計約有3,800光年。
#海鷗星雲 #星際氣體 #天文學 #銀河系 #天狼星 #IC2177 #HD53367 #CanisMajor #宇宙探索 #星雲愛好者 #天文攝影
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.
來源:NASA每日圖片
