Tham khảo Stephan's_Quintet

  1. 1 2 3 4 5 “NASA/IPAC Extragalactic Database”. Results for HCG 92. Truy cập ngày 18 tháng 9 năm 2006.
  2. 1 2 3 Moles, M.; Marquez, I.; Sulentic, J. W. (1998). “The observational status of Stephan's Quintet”. Astronomy and Astrophysics. 334: 473–481. arXiv:astro-ph/9802328. Bibcode:1998A&A...334..473M.
  3. Stephan, M. E. (1877). “Nebulæ (new) discovered and observed at the observatory of Marseille, 1876 and 1877, M. Stephan”. Monthly Notices of the Royal Astronomical Society. 37: 334–339. Bibcode:1877MNRAS..37..334S. doi:10.1093/mnras/37.6.334.

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Tài liệu tham khảo

WikiPedia: Stephan's_Quintet http://www.nightskyinfo.com/archive/stephans_quint... http://www.physorg.com/news11392.html http://www.dsi-astronomie.de/NGC7320.html http://www.galex.caltech.edu/media/glx2005-02r_img... http://nedwww.ipac.caltech.edu/ http://chandra.harvard.edu/blog/node/150 http://chandra.harvard.edu/photo/2003/stephan/ http://www.noao.edu/image_gallery/html/im0414.html http://www.noao.edu/image_gallery/text/d3/sq2c.jpg http://www.astr.ua.edu/gifimages/stephan.html