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双鼠星系.
双鼠星系 (也称为 NGC 4676)是在后发座的两个螺旋星系,距离我们大约2亿9千万光年远[2],它们目前正在碰撞和合并的过程中,名称则是来自潮汐作用 -有别于地心引力,是星系彼此之间的近端和远端拉力的差异,称为星系潮汐 - 造成的长尾。它们都是后发座星系团的成员,可能是两个已经经历过碰撞的星系,并且还会持续进行直到完全合而为一。这个星系的颜色很奇特,在上面的星系,由旋臂和蓝白色残骸围绕的核心有一些黑暗的标记。尾部也很不寻常,开始处呈现出蓝色而在结束的地方是淡黄色,
而不同于一般的。事实上,每条旋臂通常都是以黄色开始而以淡蓝色结束。下面的星系就比较像一般的星系,有着黄心和两条弧形,残余的旋臂底下仍然呈现蓝色。
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| 西佛1型 |
- Arakelian 120
- Arakelian 564
- Arp 102B
- 3C 59
- ESO 141-055
- ESO 198-G24
- ESO 323-G077
- ESO 362-18
- Fairall 9
- Fairall 51
- H0557-385
- 1H 0419-577
- 1H 1707-495
- IC 3599
- IC 4329A
- IRAS 07598+6508
- IRAS 13224-3809
- IRAS 13349+1428
- Markarian 6
- Markarian 50
- Markarian 79
- Markarian 110
- Markarian 279
- Markarian 315
- Markarian 334
- Markarian 335
- Markarian 359
- Markarian 376
- Markarian 423
- Markarian 478
- Markarian 507
- Markarian 509
- Markarian 609
- Markarian 618
- Markarian 704
- Markarian 705
- Markarian 817
- Markarian 841
- Markarian 896
- Markarian 993
- Markarian 1018
- Markarian 1044
- Markarian 1239
- MCG -2-58-22
- MCG-6-30-15
- MGC +8-11-11
- M81
- PG 1211+143
- PG 1244+026
- PG 1402+261
- PG 1404+226
- PKS 0558-504
- PMN J0948+0022
- RE J0134+396
- SBS 0846+513
- Ton S180
- I Zw 1
- III Zw 2
- III Zw 77
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| 西佛2型 |
- 圆规座星系
- ESO 103-G35
- ESO 428-G14
- IC 2560
- IC 3639
- IRAS 05189-2524
- IRAS 13197-1627
- IRAS 18325-5926
- IRAS 19014+4109
- IRAS F01475-0740
- Markarian 3
- Markarian 34
- Markarian 78
- Markarian 176
- Markarian 266 SW
- Markarian 273
- Markarian 463
- Markarian 477
- Markarian 573
- Markarian 1066
- Markarian 1210
- MCG-5-23-16
- M77
- M88
- M106
- NGC 454E
- NGC 2788A
- NGC 4676B
- NGC 4922N
- 涡状星系
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