星爆星系梅西耶94
(原标题: Starburst Galaxy Messier 94)
2025-03-06
浏览次数: 87
美丽的岛屿宇宙梅西耶94距离我们只有1500万光年远，位于北极星星座。这个面朝上的螺旋星系是地球上天文学家的热门目标，它的直径约为3万光年，螺旋臂扫过它宽阔的圆盘的边缘。但这张哈勃太空望远镜的视野横跨M94的中心区域约7000光年。这张清晰的特写观察了星系紧凑明亮的核心和突出的内部尘埃带，周围环绕着一个由年轻大质量恒星组成的引人注目的蓝色环。环中的大质量恒星似乎不到1000万年，这表明该星系经历了一个相应的明确的快速恒星形成时代。因此，虽然小而明亮的核心是典型的塞弗特类活动星系，但M94也被称为星爆星系。由于M94相对较近，天文学家可以探索该星系恒星形成爆发的详细原因。今天的报道：登月
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Beautiful island universe Messier 94 lies a mere 15 million light-years distant in the northern constellation of the hunting dogs, Canes Venatici. A popular target for earth-based astronomers, the face-on spiral galaxy is about 30,000 light-years across, with spiral arms sweeping through the outskirts of its broad disk. But this Hubble Space Telescope field of view spans about 7,000 light-years or so across M94's central region. The sharp close-up examines the galaxy's compact, bright nucleus and prominent inner dust lanes, surrounded by a remarkable bluish ring of young, massive stars. The massive stars in the ring appear to be less than about 10 million years old, indicating the galaxy experienced a corresponding well-defined era of rapid star formation. As a result, while the small, bright nucleus is typical of the Seyfert class of active galaxies, M94 is also known as a starburst galaxy. Because M94 is relatively nearby, astronomers can explore in detail reasons for the galaxy's burst of star formation. Today's Coverage: Moon Landing