APOD260129 NGC 2442:位于飞鱼座的星系
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图像提供 & 版权[1]: Mike Selby[2]
英文原文:Explanation: Distorted galaxy NGC 2442 can be found in the southern constellation of the flying fish, (Piscis) Volans . Located about 50 million light-years away, the galaxy's two spiral arms extending from a pronounced central bar give it a hook-shaped appearance in this deep and colorful image, with foreground stars scattered across the telescopic field of view. The image also reveals the distant galaxy's obscuring dust lanes, young blue star clusters and reddish star forming regions surrounding a core of yellowish light from an older population of stars. But the star forming regions seem more concentrated along the drawn-out (upper right) spiral arm. The distorted structure is likely the result of an ancient close encounter with a smaller galaxy that lies off top left of the frame. This telescopic field of view spans over 200,000 light-years at the estimated distance of NGC 2442. 说明: 扭曲的星系NGC 2442[3]位于南天的飞鱼座(Volans[4])。 这个星系距离我们约5000万光年,其两条旋臂从中央明显的棒状结构延伸而出,在这张色彩绚丽的深邃图像中呈现出钩状,前景恒星散布在望远镜的视野中。 图像还展现了这个遥远星系的屏蔽尘埃带、年轻的蓝色星团以及围绕着由较老恒星组成黄色内核的红色恒星形成[5]区。然而,恒星形成区似乎更多地集中在延深伸的(右上方)螺旋[6]臂上。 这种扭曲结构很可能是它远古时期与位于画面左上方的一个较小星系近距离接触[7]的结果。 这个望远镜视野[8]在NGC 2442的估计距离上跨越了超过20万光年。
明日的图片: stardust[9]
Authors & editors: Robert Nemiroff[10] (MTU[11]) & Jerry Bonnell[12] (UMCP[13])
NASA Official: Amber Straughn Specific rights apply[14].
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& Michigan Tech. U.[22]
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>
编辑:陈炳志[23]
[1]http://apod.nasa.gov/apod/lib/about_apod.html#srapply
[2]https://throughlightandtime.com/about/
[3]https://esahubble.org/news/heic1108/
[4]https://en.wikipedia.org/wiki/Volans
[5]http://apod.nasa.gov/apod/ap061123.html
[6]http://cass.ucsd.edu/public/tutorial/Galaxies.html
[7]http://arxiv.org/abs/astro-ph/9701015
[8]https://throughlightandtime.com/ngc-2442-lrgb-ha-rev-1-crop-cdk-1000-18-jan-2026/
[9]http://apod.nasa.gov/apod/ap260130.html
[10]http://www.phy.mtu.edu/faculty/Nemiroff.html
[12]https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
[14]http://apod.nasa.gov/apod/lib/about_apod.html#srapply
[15]https://www.nasa.gov/about/highlights/HP_Privacy.html
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