半人马座A
(原标题: Centaurus A)
2022-03-17
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半人马座A距离地球仅1100万光年，是距离地球最近的活动星系。这个特殊的椭圆星系也被称为NGC 5128，跨度超过6万光年，在这张清晰的望远镜照片中很有特色。半人马座A显然是两个正常星系碰撞的结果，导致了星团的奇妙混乱和令人印象深刻的黑暗尘埃带。在银河系中心附近，剩余的宇宙碎片正在被一个质量是太阳10亿倍的中央黑洞不断吞噬。和其他活动星系一样，这个过程可能会产生巨大的射电、x射线和伽马射线能量，这些能量是半人马座A辐射出来的。
查看原文解释
A mere 11 million light-years away, Centaurus A is the closest active galaxy to planet Earth. Spanning over 60,000 light-years, the peculiar elliptical galaxy also known as NGC 5128, is featured in this sharp telescopic view. Centaurus A is apparently the result of a collision of two otherwise normal galaxies resulting in a fantastic jumble of star clusters and imposing dark dust lanes. Near the galaxy's center, leftover cosmic debris is steadily being consumed by a central black hole with a billion times the mass of the Sun. As in other active galaxies, that process likely generates the enormous radio, X-ray, and gamma-ray energy radiated by Centaurus A.
© David Alemazkour