飞马座的星系

2020年10月15日

Galaxies in Pegasus
Image Credit & Copyright: Robert Eder

Explanation: This sharp telescopic view reveals galaxies scattered beyond the stars of the Milky Way, at the northern boundary of the high-flying constellation Pegasus. Prominent at the upper right is NGC 7331. A mere 50 million light-years away, the large spiral is one of the brighter galaxies not included in Charles Messier’s famous 18th century catalog. The disturbed looking group of galaxies at the lower left is well-known as Stephan’s Quintet. About 300 million light-years distant, the quintet dramatically illustrates a multiple galaxy collision, its powerful, ongoing interactions posed for a brief cosmic snapshot. On the sky, the quintet and NGC 7331 are separated by about half a degree.

Tomorrow’s picture: pixels in space

飞马座的星系
影像提供与版权: Robert Eder

说明: 这张清晰的广角望远镜影像，呈现散布在飞马座银河恒星后方的遥远星系。其中，最突出的是右上角的NGC 7331；这个离我们只有5千万光年远的大螺旋星系，是梅西叶18世纪著名星表遗漏的数个明亮星系之一。而影像左下角这个看似受到扰动的星系群，是著名的斯蒂芬五重星系。这个离我们约3亿光年远的五重星系，是多星系互撞的精彩范例，而上面影像是这场持续进行的强烈互扰事件之快照。在地球天空中，五重星系和NGC 7331相隔约半度。

明日的图片: pixels in space