APOD250807 英仙座双星团
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图像提供与版权[1]: Ron Brecher[2]
英文原文:Explanation: This stunning starfield spans about three full moons (1.5 degrees) across the heroic northern constellation of Perseus . It holds the famous pair of open star clusters , h and Chi Persei. Also cataloged as NGC 869 (right) and NGC 884 , both clusters are about 7,000 light-years away and contain stars much younger and hotter than the Sun. Separated by only a few hundred light-years, the clusters are both 13 million years young based on the ages of their individual stars , evidence that both clusters were likely a product of the same star-forming region. Always a rewarding sight in binoculars or small telescopes, the Double Cluster is even visible to the unaided eye from dark locations . 说明: 这片引人赞叹的星野[3] ,呈现了北天英仙座[4]方向约3个满月(1.5度)宽的区域。 视野里,有英仙座h与Chi这对著名的双星团[5]。 亦拥有编录号NGC 869(右)和 NGC 884[6]的这对星团,距离地球约7,000光年远,其内的成员恒星远比太阳年轻与炽热。 二者相隔约数百光年的这对星团,据它们成员星的年龄分析[7],其年龄都在1,300万年左右,显示这二个星团可能诞生于同一个恒星形成区[8]。 在双筒望远镜或小望远镜的视野里,这对双星团[9]是非常迷人的的景观,而在幽暗无光害的地区[10]甚至肉眼可见。
明日的图片: Dawn of the Crab[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://astrodoc.ca/about-me/
[3]https://astrodoc.ca/double-cluster-2025/
[4]http://en.wikipedia.org/wiki/Perseus_constellation
[5]https://www.nasa.gov/feature/goddard/caldwell-14
[6]http://www.messier.seds.org/xtra/ngc/n0869.html
[7]http://arxiv.org/abs/astro-ph/0205130
[8]http://www.messier.seds.org/open.html
[9]https://astrobackyard.com/double-cluster-in-perseus/
[10]http://apod.nasa.gov/apod/ap060413.html
[11]http://apod.nasa.gov/apod/ap250808.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/
[19]https://www.nasa.gov/privacy/
[20]https://astrophysics.gsfc.nasa.gov/
[22]https://www.nasa.gov/centers/goddard/
[23]https://science.nasa.gov/learners
[25]mailto:hantzong.su@gmail.com
http://apod.nasa.gov/apod/ap250807.html
http://sprite.phys.ncku.edu.tw/astrolab/mirrors/apod/ap250807.html
