返回信息流NGC 7008: The Fetus Nebula
Credit & Copyright: Dietmar Hager, Don Goldman, Paul Mortfield
Explanation: Compact and round, NGC 7008 is recognized as a planetary nebula about 2,800 light-years distant in the nebula rich constellation of Cygnus. This impressive telescopic view shows off NGC 7008's remarkable colors and details by the skillful combination of broad band and narrow band images from two different telescopes with about 12 hours of total exposure time. The intriguing assortment of features within the nebula's approximately 1 light-year diameter suggest its popular name, the Fetus Nebula, but planetary nebulae are not associated with star birth. Instead, nebulae like NGC 7008 are produced during a brief phase that sun-like stars pass through toward the end of their lives. Ejecting their outer layers, the stars cool to eventually become white dwarf stars, like the star seen near the center of NGC 7008. This colorful image also includes an unrelated but still lovely gold and blue binary star system just below NGC 7008.
胚胎星云NGC 7008
说明: 这个位于天鹅座的行星状星云NGC 7008，形状表现为相当紧密的圆形，距离我们约2800光年。上面这张细节分明的NGC 7008影像，是由两架不同的望远镜分别以宽波段和窄波段拍摄，总耗时12小时才完成。此星云因其有趣的模样而被昵称为胚胎星云，但是事实上行星状星云并不意味着恒星的诞生，而是恒星的死亡。像NGC 7008这样的天体，其实是一个类太阳恒星濒死之前抛出的气壳，中心的恒星最终将冷却成白矮星。NGC7008的后方还有一个与其无关的双星系统，图中可见其呈现金色与蓝色，相当可爱。
原文：http://antwrp.gsfc.nasa.gov/apod/ap080825.html
译文：http://www.astron.sh.cn/picbase/daily/2008/0812/081226/daily.htm
这是一条镜像帖。来源：北邮人论坛 / astronomy / #8452同步于 2008/12/26
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每日一图。。好像是每周一图。。081226
gel
2008/12/26镜像同步8 回复
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【 在 gel (14) 的大作中提到: 】
: NGC 7008: The Fetus Nebula
: Credit & Copyright: Dietmar Hager, Don Goldman, Paul Mortfield
: Explanation: Compact and round, NGC 7008 is recognized as a planetary nebula about 2,800 light-years distant in the nebula rich constellation of Cygnus. This impressive telescopic view shows off NGC 7008's remarkable colors and details by the skillfu
: ...................
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【 在 IkariShinji ([路]团长|碇シンジ|油菜花三人组之菜农) 的大作中提到: 】
: 不管每日还是每周，都要赞
欢迎你啊~
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: 呵呵没有几个人能够真的懂它们，咱们看看就好。多看看就离他们近一点。(*^__^*)
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