IFN和ngc7771集团
(原标题: IFN and the NGC 7771 Group)
2024-08-31
浏览次数: 66
NGC 7771星系群的星系在这张迷人的天空景观中引人注目。距离飞马座约2亿光年的NGC 7771是靠近中心的一个巨大的边缘螺旋星系，直径约75000光年，下面有两个较小的星系。大螺旋星系NGC 7769正对着右边。NGC 7771星系群的星系相互作用，不断地相互靠近，最终在宇宙时间尺度上导致星系-星系合并。这种相互作用可以通过星系本身形状的扭曲和它们相互引力潮汐产生的微弱恒星流来追踪。但是要清晰地看到这个星系群是很困难的，因为深层图像也显示了广阔的前景尘埃云扫过视野。暗淡的、布满灰尘的银河卷云被称为综合通量星云。暗淡的IFN反射着来自我们银河系的星光，它位于银河系平面上方仅几百光年处。
查看原文解释
Galaxies of the NGC 7771 Group are featured in this intriguing skyscape. Some 200 million light-years distant toward the constellation Pegasus, NGC 7771 is the large, edge-on spiral near center, about 75,000 light-years across, with two smaller galaxies below it. Large spiral NGC 7769 is seen face-on to the right. Galaxies of the NGC 7771 group are interacting, making repeated close passages that will ultimately result in galaxy-galaxy mergers on a cosmic timescale. The interactions can be traced by distortions in the shape of the galaxies themselves and faint streams of stars created by their mutual gravitational tides. But a clear view of this galaxy group is difficult to come by as the deep image also reveals extensive clouds of foreground dust sweeping across the field of view. The dim, dusty galactic cirrus clouds are known as Integrated Flux Nebulae. The faint IFN reflect starlight from our own Milky Way Galaxy and lie only a few hundred light-years above the galactic plane.
© Steve Mandel