雪茄星系
參考資料

1 2 3 4 5 6  . Results for NGC 3034.   [2006-10-27]. （原始内容存档于2020-12-02）.
1 2  
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Divakara Mayya, Y.; Carrasco, Luis. . Revista Mexicana de Astronomía y Astrofísica (Serie de conferencias). 2009, 37: 44–55. Bibcode:2009arXiv0906.0757D. arXiv:0906.0757 . doi:10.48550/arXiv.0906.0757.
↑  Declination separation of 36′.87 and Right Ascension separation of 9′.5 gives via Pythagorean theorem a visual separation of 38′.07; Average distance of 11.65 Mly × sin(38′.07) = 130,000 ly visual separation.
↑  Separation = sqrt(DM812 + DM822 – 2 DM81 DM82 Cos(38′.07)) assuming the error direction is about the same for both objects.
↑  . ESA / HUBBLE.   [12 March 2014]. （原始内容存档于2020-09-21）.
↑  .   [2016-06-26]. （原始内容存档于2020-12-02）.
↑  . SkyandTelescope.com.   [2016-06-26]. （原始内容存档于2014-02-14）.
↑  .   [2014-01-23]. （原始内容存档于2014-01-23）.