本星系群的矮椭圆星系NGC 205
[align=center][color=red][b]影像提供:[/b] [/color][email=jcc@cfht.hawaii.edu][color=red]J.-C. Cuillandre[/color][/email][color=red] ( [/color][url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.cfht.hawaii.edu/CFHT/Staff/Staff_alpha.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=ALkJrhiixN4bRedVfaEpzQmEcKi_60IhBA][color=red]CFHT Staff[/color][/url][color=red] ), [/color][url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.cfht.hawaii.edu/&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=ALkJrhiOUL0w7jQf1HbGRvLEBVWkr7fkFA][color=red]CFHT[/color][/url] [/align][img]http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/image/0010/ngc205_cfht_big.jpg[/img]
[color=green][b]说明:[/b]我们的[/color][url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/milky_way.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=ALkJrhhBqHKFclpQJ12vLaYuKKLJsOmC5w][color=green]银河系[/color][/url][color=green]并不孤单，因为它是[/color][url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.seds.org/messier/more/local.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=ALkJrhhZ_tvddN3-sm5PliGlb0-NTuxZDA][color=green]本星系群(Local Group)[/color][/url][color=green]的成员之一，而星系群内至少还有其他25个星系。 [align=left]本星系群的成员还包括[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap991114.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=ALkJrhjJS-wYMdiszGwTtC8j_eTP8UsV7A]仙女座大银河(M31)[/url] 、 [url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap991103.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=ALkJrhjqsXvvCfvAYMJHpK4XDJQ4VfRHvA]M32[/url] 、 [url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap980721.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=ALkJrhhCenWXgFRXE9Z1AqmP8xU_96Q6YQ]M33[/url] 、 [url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap000222.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=ALkJrhjX_9d0XIAu-rbdl-vrF7IlYNrdnw]大麦哲伦星云(LMC)[/url] 、 [url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap000430.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=ALkJrhiKDS2THpHnuCk1WjKabqbTds7zXw]小麦哲伦星云(SMC)[/url] 、 [url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap000109.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=ALkJrhinOM3AW_45OR-_cNU9KUotwvEeVw]Dwingeloo 1[/url] 、数个小型的[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.seds.org/messier/irre.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=ALkJrhictRkWYs4bracw-5QGzjj8CtK4vQ]不规则星系[/url]和许多[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://nedwww.ipac.caltech.edu/level5/Ferguson/frames.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=ALkJrhh7CeFI5rYSbYmtgJl0KxjeKCnSfw]矮椭圆星系(dwarf elliptical galaxies)[/url] 。 [/align][align=left]上面[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.cfht.hawaii.edu/Science/Astros/Imageofweek/ciw061299.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=ALkJrhg3_TkImHAjb19f4GaisqYbJbvpsw]这张影像[/url]左下方的天体，就是众多[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.astro.psu.edu/users/pdurrell/dE.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=ALkJrhiipJYIsJbJpmyX7H7yd1R0T5uR2A]矮椭圆星系[/url]之一的[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.seds.org/messier/m/m110.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=ALkJrhiheRjAJHh9zT7-ShKkOJ0hwvi91Q]NGC 205[/url] 。 [/align][align=left][url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://nedwww.ipac.caltech.edu/level5/Hodge/Hodge5_5.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=ALkJrhjYQOG_O3BWGQ5YhKSrS6tf1UGs9w]NGC 205[/url]和[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.seds.org/messier/m/m032.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=ALkJrhj3fbywrmcJfNH_1Xi1gP8JvcAMBA]M32[/url]很类以，都是M31的卫星星系，在许多M31的照片中，它通常是[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.seds.org/messier/m/m031.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=ALkJrhgDa7uDwQlNoocS90-orTmUDl8hfw]M31[/url]下方的天体。 [/align][align=left]对一个[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/elliptical_galaxies.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=ALkJrhiaDmxKth4tFZ6bU4yPh-DLMpqweA]椭圆星系[/url]来说， [url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.cfht.hawaii.edu/Science/Astros/Imageofweek/ciw061299.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=ALkJrhg3_TkImHAjb19f4GaisqYbJbvpsw]上面影像[/url]中的[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://adsabs.harvard.edu/cgi-bin/nph-bib_query%3Fbibcode%3D1998ApJ...499..209W&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=ALkJrhj8tGHMrCUVsYyuC2UUU2cNOQGgVA]NGC 205[/url]有点不寻常，它至少含有两个[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap990919.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=ALkJrhicL0f4ZwydYgQmFZ2Y-PDUrtqvPg]尘埃云[/url] ，分别在一点钟和四点钟的方向(很难辨认)，而且有迹象显示它最近曾发生过[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/stellar_nurseries.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=ALkJrhg-y0Dth2mQbKHyhGWsijJ66yM1Rg]恒星诞生活动[/url] 。 [/align][align=left]这个星系有时候又称为M110，不过它并不是[url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap960626.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=ALkJrhhlWhXDHE4LhJcDu4pkaGbVOaNWHQ]梅西叶[/url] (Messier) [url=http://203.208.37.104/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/messier.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=ALkJrhgtwDDFVq4JWI49JODWhW-2Dxu7hw]星表[/url]的原始成员，而是后来才加上去的。[/color] ::42:: ::42:: ::42:: [size=2][color=magenta](转自成大天文学教室)[/color][/size][/align]
[[i] 本帖最后由 zheng123 于 2008-8-25 14:18 编辑 [/i]]
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