Tham khảo Messier 61

  1. ↑ "Messier 61". Archived from the original on 2017-01-06. Retrieved 2017-01-11.
  2. ↑ "Galaxy On Line Database Milano Network (GOLDMine)". Retrieved 2012-08-06. "The Virgo Cluster". Retrieved 2013-04-06.
  3. ↑ "List of Supernovae". Central Bureau for Astronomical Telegrams. Retrieved 2011-07-03.
  4. ↑ Boffi, F.R.; Sparks, W.B.; Macchetto, F.D. (1999). "A search for candidate light echoes: Photometry of supernova environments". Astronomy and Astrophysics Supplement Series. 138: 253–266. arXiv:astro-ph/9906206 Freely accessible. Bibcode:1999A&AS..138..253B. doi:10.1051/aas:1999274.
  5. 1 2 3 4 5 6 "NASA/IPAC Extragalactic Database". Results for M 61. Retrieved 2006-11-18.
M1 • M2 • M3 • M4 • M5 • M6 • M7 • M8 • M9 • M10 • M11 • M12 • M13 • M14 • M15 • M16 • M17 • M18 • M19 • M20 • M21 • M22 • M23 • M24 • M25 • M26 • M27 • M28 • M29 • M30 • M31 • M32 • M33 • M34 • M35 • M36 • M37 • M38 • M39 • M40 • M41 • M42 • M43 • M44 • M45 • M46 • M47 • M48 • M49 • M50 • M51 • M52 • M53 • M54 • M55 • M56 • M57 • M58 • M59 • M60 • M61 • M62 • M63 • M64 • M65 • M66 • M67 • M68 • M69 • M70 • M71 • M72 • M73 • M74 • M75 • M76 • M77 • M78 • M79 • M80 • M81 • M82 • M83 • M84 • M85 • M86 • M87 • M88 • M89 • M90 • M91 • M92 • M93 • M94 • M95 • M96 • M97 • M98 • M99 • M100 • M101 • M102 • M103 • M104 • M105 • M106 • M107 • M108 • M109 • M110

Tài liệu tham khảo

WikiPedia: Messier 61 http://www.atlasoftheuniverse.com/galgrps/vir.html http://ned.ipac.caltech.edu/cgi-bin/objsearch?objn... http://www.cbat.eps.harvard.edu/lists/Supernovae.h... http://goldmine.mib.infn.it/ http://messier.seds.org/m/m061.html http://server1.wikisky.org/starview?object=Messier... http://www.wikisky.org/?object=Messier+61 http://www.wikisky.org/?object=Messier+61&img_sour... http://www.wikisky.org/?object=Messier+61&img_sour... http://www.wikisky.org/?object=Messier+61&img_sour...