Astronomy Picture of the Day——M63：向日葵星系
Messier 63: The Sunflower Galaxy
Image Credit & Copyright: BernardMiller
Explanation: A bright spiral galaxy of thenorthern sky, Messier 63 is about 25 million light-years distant in the loyalconstellation Canes Venatici. Also cataloged as NGC 5055, the majestic islanduniverse is nearly 100,000 light-years across. That's about the size of our ownMilky Way Galaxy. Known by the popular moniker, The Sunflower Galaxy, M63sports a bright yellowish core in this sharp telescopic portrait. Its sweepingblue spiral arms are streaked with cosmic dust lanes and dotted with pink starforming regions. A dominant member of a known galaxy group, M63 has faint,extended features that are likely star streams from tidally disrupted satellitegalaxies. M63 shines across the electromagnetic spectrum and is thought to haveundergone bursts of intense star formation.
M63：向日葵星系
M63是北天猎犬座内一个明亮的旋涡星系，距离地球约2500万光年。这个宏大的星系被编录为NGC 5055，其跨度将近10万光年，相当于】银河系的大小。M63通常昵称为向日葵星系，在这幅清晰的望远镜影像中，能够看到它的亮黄色星系核，以及镶嵌着宇宙尘埃带和粉色恒星形成区的广袤蓝色旋臂。M63是比较著名的星系之一，它绵延的黯淡结构很可能是受到卫星星系潮汐破坏而形成的恒星流。M63在所有电磁波段都很闪耀，我们认为它经历了一阵强烈的恒星形成活动。
参考文献：
https://apod.nasa.gov/apod/image/1906/M63_PS1_CROP2_FULL.jpg
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