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2012-08-17 螺旋星系NGC 5033
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dailyas...@gmail.com
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Aug 17, 2012, 1:00:58 AM
8/17/12
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位在北天猎犬座内的壮丽宇宙岛NGC 5033,离我们大约有四千万光年远。这幅望远镜影像,呈现星系明亮核心周围的蜿蜒尘埃带之细微结构,以及宏伟但相对昏暗的螺旋臂。上面散布著粉红恒星形成区及蓝色大质量星团的螺旋臂,跨幅超过十万光年,和我们的银河系大小相近。NGC 5033是一例被仔细研究过的西佛型活跃星系,有个明亮但光度多变的星系核心,而核心发光的能源可能是一颗超大质量黑洞。星系明亮核心和星系旋转中心,看起来有个很小的错位,这也暗指星系NGC 5033是一个远古星系合并的产物。
内容提供:
http://apod.nasa.gov/apod/ap120817.html
中文翻译:成功大学物理学系 苏汉宗,陈昭敏 等
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