卷曲螺旋星系M63
(原标题: Curly Spiral Galaxy M63)
2023-05-19
浏览次数: 15
梅西耶63是北部天空中一个明亮的螺旋星系，它就在附近，距离忠实的金星星座约3000万光年。这个雄伟的宇宙岛也被编号为NGC 5055，直径近10万光年，大约是我们银河系的大小。它明亮的核心和雄伟的旋臂使它有了一个通俗的名字——向日葵星系。这张异常深的曝光也跟随微弱的弧形恒星流进入星系的光晕。从银河系中心延伸近18万光年，恒星流很可能是M63被潮汐破坏的卫星的残余物。M63的其他卫星星系也可以在这张广角图像中被发现，包括微弱的矮星系，它们可能在未来几十亿年里为M63的恒星流做出贡献。
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A bright spiral galaxy of the northern sky, Messier 63 is nearby, about 30 million light-years distant toward the loyal constellation Canes Venatici. Also cataloged as NGC 5055, the majestic island universe is nearly 100,000 light-years across, about the size of our own Milky Way. Its bright core and majestic spiral arms lend the galaxy its popular name, The Sunflower Galaxy. This exceptionally deep exposure also follows faint, arcing star streams far into the galaxy's halo. Extending nearly 180,000 light-years from the galactic center, the star streams are likely remnants of tidally disrupted satellites of M63. Other satellite galaxies of M63 can be spotted in the remarkable wide-field image, including faint dwarf galaxies, which could contribute to M63's star streams in the next few billion years.
© Sophie Paulin