M63:向日葵星系
影像来源与版权:Bernard Miller

说明:M63是北天猎犬座内一个明亮的旋涡星系,距离我们约2500万光年远。这座宏伟的岛宇宙也被编录为NGC 5055,其跨度将近10万光年,相当于我们银河系的大小。在这幅清晰的望远镜影像中,昵称为向日葵星系的M63拥有一个亮黄色的星系核,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是一个著名星系群的主要成员,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波强烈的恒星形成活动。
翻译:北京天文馆

Messier 63: The Sunflower Galaxy
Image Credit & Copyright: Bernard Miller

Explanation: A bright spiral galaxy of the northern sky, Messier 63 is about 25 million light-years distant in the loyal constellation Canes Venatici. Also cataloged as NGC 5055, the majestic island universe is nearly 100,000 light-years across. That’s about the size of our own Milky Way Galaxy. Known by the popular moniker, The Sunflower Galaxy, M63 sports a bright yellowish core in this sharp telescopic portrait. Its sweeping blue spiral arms are streaked with cosmic dust lanes and dotted with pink star forming regions. A dominant member of a known galaxy group, M63 has faint, extended features that are likely star streams from tidally disrupted satellite galaxies. M63 shines across the electromagnetic spectrum and is thought to have undergone bursts of intense star formation.
Astronomy Picture of the Day 06/06/2019