NGC 6960:巫婆的扫帚
[align=center][color=red][b]影像版权与提供:[/b] [/color][email=robgendler@worldnet.att.net][color=red]Robert Gendler[/color][/email] [/align][img]http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/image/0008/witchsbroom_gendler_big.jpg[/img]
[color=green][b]说明:[/b]一万年前，人类还没开始用[/color][url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://news.bbc.co.uk/hi/english/sci/tech/newsid_334000/334517.stm&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhhVH-D2ZPPLjxdIOplvIQGX1oNakA][color=green]文字来记录历史[/color][/url][color=green] ，当时一定有一颗「客星」，忽然出现在夜空中，然后在几个星期后，又消失匿迹。 [align=left]现在，我们知道那颗客星，是[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://imagine.gsfc.nasa.gov/docs/science/know_l1/supernovae.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhhv7K1oqmk3wcsaBy4Xjhpw2_0z3w]恒星爆炸[/url]所产生的现象。 [/align][align=left]它所留下来的遗骸称为[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://nineplanets.org/twn/cygnusx.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhhHjNrqgkLZZZ8sRHlw-gSKHv057A]面纱星云(Veil Nebula)[/url] ，是一个到现在还在扩张的美丽气壳。 [/align][align=left]上面的[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://robgendler.astrodigitals.com/Nebulas.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhildqLaoNRGxBqrHRcx-SFD9-CYvw]这张照片[/url]中的天体，就是[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.astropix.com/HTML/E_SUM_N/VEIL.HTM&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhi56Wxxl4WK6jsJ9RloXHofEkoY6g]面纱星云[/url]的西侧，它正式的名称是[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.ngcic.com/dss/dss_images.htm&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhgjG990VzptdnZ_qbirOlcPxpZcDw]NGC[/url] 6960 ，也常被昵称为巫婆的扫帚(Witch's Broom Nebula)。 [/align][align=left]当气壳急速向外扩张时，它冲击四周原来就存在的云气，除了[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap960307.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhjYWngy2auPtgt0OaJru3ezy82z9A]激发[/url]云气发光外，本身也辐射出各种颜色的辉光。 [/align][align=left]这个[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/supernova_remnants.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhgJTAxQoux4dXUJ7-6AAPBec4aeyg]超新星遗骸[/url]位在[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.multimania.com/cdadfs/constellation/cygne/cygnus.htm&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhjLZRt0CojUkWwL6vKZMcm45ywuXQ]天鹅座(Cygnus)[/url] ，距离我们约有1400光年。 [/align][align=left]照片中这把"巫婆扫帚"的视张角，大约是满[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/moon.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhhbveVvnMg9Mc3sT-i81p0zl5EiXg]月[/url]的三倍多一点。 [/align][align=left]星云上方的那颗明亮的蓝色恒星，是[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.seds.org/Maps/Stars_en/Fig/cygnus.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhgDcRMwvJXJH4Tn21QmZ3fclwVRtw]天鹅座[/url] 52星，在远离光害的地区，用肉眼就能够看到它。 [/align][align=left]虽然它紧贴着"扫帚"，不过它和这次发生在古代的[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.chapman.edu/oca/benet/intro_sn.htm&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhheJ7KbupiFRfFIuqDT4lM-IUkQcA]超新星[/url]爆炸事件无关。[/color] ::42:: ::42:: ::42:: [size=2][color=magenta](转自成大天文学教室)[/color][/size][/align] yct54.gif 灵灵灵，非常漂亮，::41:: ::41:: ::0023::
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