APOD250819 孔雀座的庞大星系
孔雀座的庞大星系
图像提供与版权[1]: Adam Block[2]
英文原文:Explanation: Over 500,000 light years across, NGC 6872 (bottom left) is a truly enormous barred spiral galaxy . At least 5 times the size of our own large Milky Way, NGC 6872 is the largest known spiral galaxy. About 200 million light-years distant toward the southern constellation Pavo, the Peacock, the appearance of this giant galaxy's stretched out spiral arms suggest the wings of a giant bird. So its popular moniker is the Condor galaxy. Lined with massive young, bluish star clusters and star-forming regions , the extended and distorted spiral arms are due to NGC 6872's past gravitational interactions with the nearby smaller galaxy IC 4970 , visible here below the giant spiral galaxy's core. Other members of the southern Pavo galaxy group are scattered through this magnificent galaxy group portrait , with the dominant giant elliptical galaxy, NGC 6876, above and right of the soaring Condor galaxy. 说明: 跨幅超过500,000光年的NGC 6872[3](左下),是个如假包换的庞大棒旋星系[4]。 大小至少是银河系五倍之多的NGC 6872[5],是现知最大的螺旋星系。 位于南天的孔雀座方向、距离约2亿光年远的此巨型星系[6],其绵延的螺旋臂形似巨鸟的翅膀,因此也为它博得秃鹰星系的令名。 由于NGC 6872过去与附近较小、位于其内核下方的IC 4970 星系[7]之间的重力互扰,造成它延伸且扭曲的螺旋臂上,散布着大量的年轻蓝色星团和恒星形成区[8]。 此外,在这幅壮丽星系群的合照[9]里,还可见到南天孔雀星系群[10]的其他成员,包括位于秃鹰星系上右方的庞然椭圆星系NGC 6876 。
明日的图片: pixels in space[11]
Authors & editors: Robert Nemiroff[12] (MTU[13]) & Jerry Bonnell[14] (UMCP[15])
NASA Official: Amber Straughn Specific rights apply[16].
NASA Web Privacy[17], Accessibility[18], Notices[19];
A service of: ASD[20] at NASA[21] / GSFC[22],
NASA Science Activation[23]
& Michigan Tech. U.[24]
太空天文实验室(成功大学物理系)
<br/> 编辑:<a href="mailto:hantzong.su@gmail.com" style="color:gray;" target="_blank">苏汉宗</a> <br/> 编辑:<a href="mailto:alfred@ncku.edu.tw" style="color:gray;" target="_blank">陈炳志</a> 编辑:苏汉宗[25]
[1]http://apod.nasa.gov/apod/lib/about_apod.html#srapply
[2]https://www.adamblockphotos.com/
[3]http://www.eso.org/public/images/eso9924b/
[4]https://ui.adsabs.harvard.edu/abs/2007A%26A...464..155H/abstract
[5]https://ui.adsabs.harvard.edu/abs/2014ApJ...795...89E/abstract
[6]http://apod.nasa.gov/apod/ap110403.html
[7]http://chandra.harvard.edu/photo/2009/ngc6872/
[8]https://ui.adsabs.harvard.edu/abs/2009ApJ...691.1921M/abstract
[9]https://www.adamblockphotos.com/ngc-6872.html
[10]https://www.astroexplorer.org/details/apj296376f1
[11]http://apod.nasa.gov/apod/ap250820.html
[12]http://www.phy.mtu.edu/faculty/Nemiroff.html
[14]https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
[16]http://apod.nasa.gov/apod/lib/about_apod.html#srapply
[17]https://www.nasa.gov/about/highlights/HP_Privacy.html
[18]https://www.nasa.gov/general/accessibility/
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http://apod.nasa.gov/apod/ap250819.html
http://sprite.phys.ncku.edu.tw/astrolab/mirrors/apod/ap250819.html