附近的螺旋星系ngc4945
(原标题: Nearby Spiral Galaxy NGC 4945)
2022-02-26
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在这张宇宙星系的特写中，可以看到大型螺旋星系ngc4945几乎是侧面的。它几乎和我们的银河系一样大。NGC 4945本身的尘埃盘、年轻的蓝色星团和粉红色的恒星形成区域在彩色望远镜框架中非常突出。NGC 4945距离广阔的南半人马座大约1300万光年，距离仙女座星系只有6倍远，仙女座星系是离银河系最近的大型螺旋星系。虽然这个星系的中心区域在很大程度上隐藏在光学望远镜的视野之外，但x射线和红外观测表明，在ngc4945的核心有显著的高能量发射和恒星形成。其模糊但活跃的核心使这个美丽的宇宙岛成为塞弗特星系，中心有一个超大质量黑洞。
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Large spiral galaxy NGC 4945 is seen nearly edge-on in this cosmic galaxy close-up. It's almost the size of our Milky Way Galaxy. NGC 4945's own dusty disk, young blue star clusters, and pink star forming regions stand out in the colorful telescopic frame. About 13 million light-years distant toward the expansive southern constellation Centaurus, NGC 4945 is only about six times farther away than Andromeda, the nearest large spiral galaxy to the Milky Way. Though this galaxy's central region is largely hidden from view for optical telescopes, X-ray and infrared observations indicate significant high energy emission and star formation in the core of NGC 4945. Its obscured but active nucleus qualifies the gorgeous island universe as a Seyfert galaxy and home to a central supermassive black hole.
© Dietmar Hager