雷神的头盔对战海鸥
(原标题: Thor's Helmet versus the Seagull)
2025-02-18
浏览次数: 23
像海鸥和鸭子一样，这些星云并不是唯一能唤起飞行图像的宇宙云。但它们都在这片广阔的天空中飞翔，横跨地球夜空近7度，朝向大犬星座（大犬星座）。广阔的海鸥星云（上中心）本身由两个主要的发射星云组成。较亮的NGC 2327形成头部，较分散的IC 2177形成翅膀和主体。令人印象深刻的是，海鸥的翼展相当于250光年，而星云的估计距离为3800光年。在右下角，鸭子看起来要紧凑得多，根据它1.5万光年的距离估计，它的跨度只有50光年左右。鸭星云被中心附近一颗巨大的热恒星吹来的高能风吹来，编号为NGC 2359。当然，这只鸭子厚实的身体和带翅膀的附属物也让它有了一个稍微引人注目的流行绰号——雷神的头盔。传送门宇宙：随机APOD生成器
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Seen as a seagull and a duck, these nebulae are not the only cosmic clouds to evoke images of flight. But both are winging their way across this broad celestial landscape, spanning almost 7 degrees across planet Earth's night sky toward the constellation of the Big Dog (Canis Major). The expansive Seagull (top center) is itself composed of two major cataloged emission nebulas. Brighter NGC 2327 forms the head with the more diffuse IC 2177 as the wings and body. Impressively, the Seagull's wingspan would correspond to about 250 light-years at the nebula's estimated distance of 3,800 light-years. At the lower right, the Duck appears much more compact and would span only about 50 light-years given its 15,000 light-year distance estimate. Blown by energetic winds from an extremely massive, hot star near its center, the Duck nebula is cataloged as NGC 2359. Of course, the Duck's thick body and winged appendages also lend it the slightly more dramatic popular moniker, Thor's Helmet. Portal Universe: Random APOD Generator
© Nicolas Martino, Adrien Soto, Louis Leroux & Yann Sainty