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Whirlpool Galaxy

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jointly by the CNRS Laboratoire d'Astronomie Spatiald (L.A.S.- CNRS) and the Observatoire de Haute Provence (O.H.P.) along with the particularly nice seeing offered by the Canada-France-Hawaii-Telescope (C.F.H.T.) 3.60m Cassegrain focus at Mauna Kea summit in Hawaii, Hua et al. detected the double component of the very nucleus of the Whirlpool galaxy.
993: 811:(also known as Messier 51b or M51b) is a dwarf galaxy that is interacting with the Whirlpool Galaxy (also known as M51a or NGC 5194). Both galaxies are located approximately 25 million light-years away in the constellation Canes Venatici. Together, the two galaxies are one of the most widely studied interacting galaxy pairs. 554:, which may have passed through the main disk of M51 about 500 to 600 million years ago. In this proposed scenario, NGC 5195 came from behind M51 through the disk towards the observer and made another disk crossing as recently as 50 to 100 million years ago until it is where we observe it to be now, slightly behind M51. 574:
In 2015, a study discovered two new tidal features caused by the interaction between the Whirlpool Galaxy and NGC 5195, the "Northeast plume" and the "South plume". The study remarks that a simulation that takes into account only one passage of NGC 5195 into the Whirpool Galaxy will fail to produce
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The central region of M51 appears to be undergoing a period of enhanced star formation. The present efficiency of star formation, defined as the ratio of mass of new stars to the mass of star-forming gas, is only ~1%, quite comparable to the global value for the Milky Way and other galaxies. It is
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and subsequent radio images of M51 unequivocally demonstrated that the Whirlpool and its companion galaxy are indeed interacting. Sometimes the designation M51 is used to refer to the pair of galaxies, in which case the individual galaxies may be referred to as M51a (NGC 5194) and M51b (NGC 5195).
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As is usual for galaxies, the true extent of its structure can only be gathered from inspecting photographs; long exposures reveal a large nebula extending beyond the visible circular appearance. In 1984, thanks to the high-speed detector—the so-called image-photon-counting- IPCS—system—developed
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under dark sky conditions, and it can be resolved in detail with modern amateur telescopes. When seen through a 100 mm telescope the basic outlines of M51 (limited to 5Ă—6') and its companion are visible. Under dark skies, and with a moderate eyepiece through a 150 mm telescope, M51's
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Ferrarese, L.; Ford, H. C.; Huchra, J.; Kennicutt Jr., R. C.; et al. (2000). "A Database of Cepheid Distance Moduli and Tip of the Red Giant Branch, Globular Cluster Luminosity Function, Planetary Nebula Luminosity Function, and Surface Brightness Fluctuation Data Useful for Distance
437:; it reaches a high altitude throughout this hemisphere making it an accessible object from the early hours in November through to the end of May, after which observation is more coincidental in modest latitudes with the risen sun (due to the Sun approaching to and receding from its 549:
The Whirlpool Galaxy has two, very prominent spiral arms that wind clockwise. One arm deviates from a constant angle significantly. The pronounced spiral structure of the Whirlpool Galaxy is believed to be the result of the close interaction between it and its companion galaxy
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estimated that the current high rate of star formation can last no more than another 100 million years or so. Similarly, the spiral arms are experiencing high levels of star formation, as well as the space along the arms.
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Rosse revealed the spiral structure of Whirlpool galaxy (M51) at the 1845 meeting of the British Association for the Advancement of Science. Rosse's illustration of M51 was reproduced in J.P. Nichol's book of 1846.
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As a result of the Whirpool Galaxy's interaction with NGC 5195, a variety of tidal features have been created. The largest of these features is the so-called Northwest plume, which extends out to 43
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Report of the Fifteenth Meeting of the British Association for the Advancement of Science; Held at Cambridge in June 1845 § Notices and Abstracts of Miscellaneous Communications to the Sections
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The Whirlpool Galaxy lies at a distance of about 23 to 31 million light-years from Earth. Based on the 1991 measurement by the Third Reference Catalogue of Bright Galaxies using the
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Castro-Rodríguez, N.; López-Corredoira, M.; Sánchez-Saavedra, M. L.; Battaner, E. (2002). "Warps and correlations with intrinsic parameters of galaxies in the visible and radio".
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intrinsic spiral structure can be detected. With larger (>300 mm) instruments under dark sky conditions, the various spiral bands are apparent with
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Fouque, P.; Gourgoulhon, E.; Chamaraux, P.; Paturel, G. (1992). "Groups of galaxies within 80 Mpc. II - The catalogue of groups and group members".
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an analogue to the Northeast tail. In contrast, the multiple-passage simulations made by Salo and Laurikainen et.al reproduce the northeast plume.
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Giuricin, G.; Marinoni, C.; Ceriani, L.; Pisani, A. (2000). "Nearby Optical Galaxies: Selection of the Sample and Identification of Groups".
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Di Stefano, Rosanne; Berndtsson, Julia; Urquhart, Ryan; Soria, Roberto; Kashyap, Vinay L.; Carmichael, Theron W.; Imara, Nia (2021-10-25).
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Matsushita, Satoki; Muller, Sebastien; Lim, Jeremy (9 April 2007). "Jet-disturbed molecular gas near the Seyfert 2 nucleus in M51".
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in some of these spiral nebulae, which provided evidence that they were so far away that they must be entirely separate galaxies.
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De Vaucouleurs, Gerard; De Vaucouleurs, Antoinette; Corwin, Herold G.; Buta, Ronald J.; Paturel, Georges; Fouque, Pascal (1991).
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is among the most famous and relatively close interacting systems, and thus is a favorite subject of galaxy interaction models.
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constructed a 11,477 Ă— 7,965-pixel composite image (shown in the infobox above) of M51 using Hubble's
6905: 3794: 2620: 1838:"Near-Infrared Mass-to-light ratios in Galaxies: Stellar Mass and Star Formation in the Heart of the Whirlpool" 1724: 896:. Thus its light emits as far south, to a good minimal cumulation of 15° above the horizon, once a day, on the 476:. The image highlights the galaxy's spiral arms, and shows detail into some of the structures inside the arms. 7693: 3737: 3105: 1438: 1468: 1018: 65: 7580: 6889: 3252: 2827: 1621: 1286: 1234: 257: 853:, although most group identification methods and catalogs identify the three groups as separate entities. 2596: 1879:
Knapen, Johan H.; Beckman, John E.; Cepa, Jordi; van der Hulst, Thijs; Rand, Richard J. (February 1992).
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Goodwin, S. P.; Gribbin, J.; Hendry, M. A. (22 April 1997). "The Milky Way is just an average spiral".
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Rosse's illustration of the Whirlpool galaxy appears on the plate that immediately precedes p. 23.
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M51-ULS-1 in this galaxy was announced. If confirmed, it would be the first known instance of an
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Goodwin, S. P.; Gribbin, J.; Hendry, M. A. (August 1998). "The relative size of the Milky Way".
1343:. Report of the ... Meeting of the British Association for the Advancement of Science (1833): 4. 6963: 3722: 3512: 3021: 748: 680: 657: 442: 265: 132: 2543:
NASA Astronomy Picture of the Day: M51: The Whirlpool Galaxy in Dust and Stars (10 April 2001)
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is estimated to be 160 billion solar masses, or around 10.3% of the mass of Milky Way Galaxy.
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Garcia, A. (1993). "General study of group membership. II – Determination of nearby groups".
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was detected in the Whirlpool Galaxy, peaking at magnitude 12.1. This supernova, designated
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A 1992 Hubble image showing a knot of dust encircling the black hole at the center of M51
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What later became known as the Whirlpool Galaxy was discovered on October 13, 1773, by
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infrared images. No object could be seen at the position of the transient in archival
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The image of the Whirlpool Galaxy in visible light (left) and infrared light (right)
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The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters
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while hunting for objects that could confuse comet hunters, and was designated in
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Salo, Heikki; Laurikainen, Eija (1999). "A Multiple Encounter Model of M51".
1622:"NASA's Hubble Space Telescope Resolves a Dark "x" Across the Nucleus of M51" 634: 382: 378: 308: 297: 220: 216: 76: 2547: 2161: 1424: 7660: 7162: 6505: 3342: 3217: 3212: 2557: 2542: 1281: 772: 386: 2537: 1774:"Deep Imaging of M51: a New View of the Whirlpool's Extended Tidal Debris" 487:
a) 0.4; 0.7 μm – b) vis-blue/green; ir-red – c) 3.6; 4.5; 8 μm – d) 24 μm
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Sauer, D. N.; Mazzali, P. A.; Deng, J.; Valenti, S.; et al. (2006).
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Watkins, Aaron E.; Mihos, J. Christopher; Harding, Paul (February 2015).
1552: 1496: 780: 429:, and going 3.5° southwest. Its declination is, rounded, +47°, making it 374: 100: 2612: 671:, was discovered in Messier 51. The transient was later identified as a 618:
was observed in the Whirlpool Galaxy, peaking at apparent magnitude 14.
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images, indicating that the progenitor star was heavily obstructed by
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Thoughts on Some Important Points Relating to the System of the World
826: 820: 760: 626: 615: 593: 515: 1439:"Out of This Whirl: The Whirlpool Galaxy (M51) and Companion Galaxy" 7593: 7434: 7429: 7424: 7419: 7414: 7409: 7404: 7399: 7394: 7389: 7384: 7379: 7374: 7369: 7364: 7349: 7344: 7339: 7334: 7329: 7324: 7319: 7314: 7309: 7304: 7299: 7294: 7289: 7284: 7279: 7274: 7269: 7264: 7259: 7254: 7249: 7244: 7209: 7113: 7108: 6695: 6306: 6281: 6261: 6216: 6201: 6196: 6186: 6181: 6171: 6166: 6161: 6156: 6136: 6131: 6106: 6006: 5991: 5976: 5971: 5941: 5926: 5911: 5871: 5821: 5806: 5801: 5786: 5781: 5771: 5751: 5716: 5686: 5651: 5646: 5546: 5501: 5486: 5441: 5416: 5411: 5406: 5401: 5381: 5376: 5371: 5366: 5331: 5326: 5286: 5261: 5236: 5226: 5221: 5196: 5171: 5151: 5131: 5121: 5116: 5111: 5096: 5091: 5086: 5071: 5066: 5041: 5021: 5006: 4976: 4946: 4851: 4836: 4831: 4821: 4806: 4776: 4716: 4706: 4681: 4651: 4636: 4631: 4606: 4551: 4506: 4401: 4391: 4341: 4336: 4331: 4321: 4286: 4281: 4266: 4261: 4251: 4221: 4171: 4166: 4096: 4081: 4003: 3998: 3993: 3983: 3963: 3948: 3923: 3888: 3883: 3878: 3873: 3868: 3863: 3858: 3853: 3848: 3843: 3838: 3833: 3357: 2812: 2797: 2767: 2512: 2456: 2289: 2180: 1905: 1880: 1864: 1837: 1790: 1396: 1369: 1142: 1105: 842: 838: 808: 803: 600: 551: 334: 318: 232: 110: 45: 3090: 1665: 1170: 7521: 7501: 7496: 7486: 7064: 6733: 5966: 5961: 2568: 2364: 2270: 652: 649:, which are thought to be the most common supernova progenitors. 630: 35: 2477: 1469:"Hubble's Messier Catalogue – Messier 51 (The Whirlpool Galaxy)" 7511: 7491: 7481: 7476: 7471: 7184: 6690: 2991: 2986: 2976: 2971: 2245:"Astronomers may have found the first planet in another galaxy" 787: 426: 1881:"Star Formation Efficiency Patterns in the Spiral Arms of M51" 1878: 2422: 1872: 633:
profiles, which indicate rapidly expanding material, in its
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at the B-band, the Whirlpool Galaxy has a diameter of 23.58
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was observed in the Whirlpool Galaxy. It was classified as
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Jacob E. Jencson; Scott M. Adams; Howard E. Bond (2019).
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Nemiroff, R.; Bonnell, J., eds. (February 24, 2013).
1112: 771:(XRS), which consists of a stellar remnant (either a 697: 381:, the first "nebula" to be known to have one. These " 19:"Galaxy M51" redirects here. For the smartphone, see 6392: 1836:
Thronson, Harley A.; Greenhouse, Matthew A. (1988).
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The Whirlpool Galaxy is the brightest galaxy in the
6904: 2065:. supernovae.net (International Supernovae Network) 1771: 1598:. Cardiff University. June 19, 2009. Archived from 1155: 1082:(1987). "Arm classifications for spiral galaxies". 514:). Overall the galaxy is about 88% the size of the 7579: 1835: 1074: 719: 629:, showed a spectrum much bluer than average, with 2085:"AAVSO Special Notice #241: New Supernova in M51" 1949:Monthly Notices of the Royal Astronomical Society 1370:"A spiral nebula as a stellar system, Messier 31" 1314:Catalogue des NĂ©buleuses & des amas d'Étoiles 7680: 2416: 2222:"Signs of first planet found outside our galaxy" 1354:. Edinburgh, Scotland: William Tait. p. 23. 377:, Ireland, found that the Whirlpool possessed a 2471: 1721: 1279: 921:Dreyer, J. L. E. (1988). Sinnott, R. W. (ed.). 675:. The progenitor star was detected in archival 457:visible, and M51 can be seen to be attached to 7538: 2358: 2054: 1119:Arp, H. (1966). "Atlas of Peculiar Galaxies". 687:. 2019abn peaked at magnitude 17, reaching an 6890: 6378: 3802: 3106: 2628: 2553:The Whirlpool Galaxy (Messier 51(a)/NGC 5194) 1767: 1765: 1763: 763:Galaxy. The planet candidate was detected by 7161: 1051:Third Reference Catalogue of Bright Galaxies 786:. The planet would be slightly smaller than 656:Supernova impostor AT2019abn, imaged by the 596:have been observed in the Whirlpool Galaxy: 484:Whirlpool Galaxy – Observed in Various Light 2563:The Whirlpool Galaxy at Constellation Guide 2236: 2082: 1923:. Central Bureau for Astronomical Telegrams 814: 44:, the smaller object in the upper right is 6897: 6883: 6385: 6371: 3809: 3795: 3718:Catalogue of Nebulae and Clusters of Stars 3113: 3099: 2635: 2621: 2387: 1760: 1164:(A&A Letters Special Issue): L49–L52. 914: 34: 16:Galaxy in the constellation Canes Venatici 7135: 2642: 2494: 2438: 2288: 2197: 2179: 2002: 1979: 1961: 1904: 1863: 1789: 1664: 1647:Honig, Z.N.; Reid, M.J. (February 2015). 1646: 1640: 1551: 1495: 1395: 1169: 1070: 1068: 541:extend from the active galactic nucleus. 333:) and galaxy interactions. Its pair with 2101: 1413:Astrophysical Letters and Communications 790:and orbit at a distance of some tens of 735:In September 2020, the detection by the 651: 524: 478: 433:(never setting) for observers above the 408: 385:" were not recognized as galaxies until 344: 325:, and the two galaxies may be seen with 209: 158: 7744:Astronomical objects discovered in 1773 1504: 1483: 1311: 1275: 1273: 1210:"Whirlpool Galaxy: First Spiral Galaxy" 105:+47° 11′ 43″ 7681: 2393: 2003:MacRobert, Alan M. (August 24, 2005). 1531: 1367: 1347: 1232: 1065: 988: 986: 984: 982: 980: 978: 976: 974: 972: 970: 920: 244:Question Mark Galaxy, Rosse's Galaxy, 6878: 6366: 3790: 3094: 2616: 2397:Astronomy and Astrophysics Supplement 2368:Astronomy and Astrophysics Supplement 2335: 2242: 2076: 1334: 1044: 1042: 968: 966: 964: 962: 960: 958: 956: 954: 952: 950: 40:Whirlpool Galaxy (M51a), as taken by 7729:Principal Galaxies Catalogue objects 3761: 1411:Hua; et al. (1987). "Unknown". 1270: 865:– another grand-design spiral galaxy 404: 141:(23.5 Â± 6.95 million 6917:Canes Venatici in Chinese astronomy 3120: 2329: 2083:Kinne (kqr), Richard (2011-06-03). 1410: 1235:"Messier 51 (The Whirlpool Galaxy)" 1118: 1025: 1019:"Messier 51 (The Whirlpool Galaxy)" 730: 614:In June 2005 the type II supernova 587: 544: 369:, employing a 72-inch (1.8 m) 13: 2111:. Astronomers Telegram. 2011-06-03 2060: 2029: 1039: 994:"NASA/IPAC Extragalactic Database" 947: 892:47 out of 90 degrees north of the 367:William Parsons, 3rd Earl of Rosse 14: 7760: 2531: 2243:Crane, Leah (23 September 2020). 2168:The Astrophysical Journal Letters 578: 557: 7666: 7654: 7642: 7619: 7618: 3770: 3760: 3751: 3750: 3696: 2482:Astrophysical Journal Supplement 2232:from the original on 2021-10-25. 1981:10.1111/j.1365-2966.2006.10438.x 1149: 1122:Astrophysical Journal Supplement 637:. The progenitor was probably a 6927:List of stars in Canes Venatici 6906:Constellation of Canes Venatici 2264: 2214: 2155: 2122: 2023: 1996: 1935: 1913: 1614: 1584: 1461: 1431: 1404: 1361: 1324: 1305: 1248: 1226: 886: 779:) and a massive star, likely a 198:25.0 mag/arcsec B-band isophote 7749:Discoveries by Charles Messier 2548:Whirlpool Galaxy at ESA/Hubble 1725:Astrophysics and Space Science 1202: 1011: 317:The galaxy and its companion, 1: 3738:Revised New General Catalogue 1885:Astrophysical Journal Letters 1348:Nichol, John Pringle (1846). 907: 493: 483: 1540:Astronomy & Astrophysics 1287:Astronomy Picture of the Day 1262:. 2016-10-10. Archived from 1158:Astronomy & Astrophysics 833:that also includes M63 (the 797: 340: 7: 1282:"M51: The Whirlpool Galaxy" 856: 720:{\displaystyle M_{r}=-14.9} 441:, specifically figuring in 10: 7765: 2342:Cambridge University Press 2307:10.1038/s41550-021-01495-w 2063:"Supernovae 2011dh in M51" 1808:10.1088/2041-8205/800/1/L3 1683:10.1088/0004-637X/800/1/53 1628:. HubbleSite. June 8, 1992 1596:Herschel Space Observatory 1570:10.1051/0004-6361:20020895 1312:Messier, Charles (1781). " 1233:Garner, Rob (2017-10-06). 1188:10.1051/0004-6361:20067039 931:Cambridge University Press 927:Sky Publishing Corporation 818: 801: 417:Deep in the constellation 18: 7616: 7575: 7534: 7464: 7443: 7235: 7192: 7183: 7157: 7131: 7096: 7078: 7030: 6972: 6944: 6935: 6912: 6709: 6401: 6335: 3829: 3746: 3705: 3694: 3128: 3020: 2942: 2884: 2826: 2758: 2650: 2032:"Supernova 2005cs in M51" 1843:The Astrophysical Journal 1778:The Astrophysical Journal 1653:The Astrophysical Journal 737:Chandra X-ray Observatory 321:, are easily observed by 243: 238: 227: 204: 182: 172: 167: 153: 131: 109: 99: 87: 75: 63: 33: 28: 7689:Unbarred spiral galaxies 2567:The Whirlpool Galaxy on 2558:M51 The Whirlpool Galaxy 2199:10.3847/2041-8213/ab2c05 1471:. NASA. October 17, 2017 879: 815:Galaxy group information 260:47404, VV 001a, VV 403, 2538:SEDS: Spiral Galaxy M51 2410:1993A&AS..100...47G 2381:1992A&AS...93..211F 2338:Nearby Galaxies Catalog 1746:10.1023/A:1017002909665 1738:1999Ap&SS.269..663S 1562:2002A&A...391..519C 1335:Rosse, Earl of (1846). 1318:Connaissance des Temps 1260:Messier Objects 101.com 1180:2007A&A...468L..49M 869:List of Messier objects 677:Spitzer Space Telescope 470:Hubble Heritage Project 448:M51 is visible through 305:active galactic nucleus 3723:Herschel 400 Catalogue 1368:Hubble, E. P. (1929). 749:high-mass X-ray binary 721: 663:On 22 January 2019, a 660: 658:Hubble Space Telescope 530: 490: 445:, just to the north). 414: 354: 137:7.22 Â± 2.13 3818:New General Catalogue 3733:New General Catalogue 2644:Astronomical catalogs 2426:Astrophysical Journal 2336:Tully, R. B. (1988). 2138:Transient Name Server 1375:Astrophysical Journal 1085:Astrophysical Journal 722: 655: 635:hydrogen-Balmer lines 528: 482: 412: 348: 42:European Space Agency 7694:Interacting galaxies 7205:a (Whirlpool Galaxy) 6340:Astronomical catalog 1921:"List of Supernovae" 1320:. pp. 227–267 . 998:Results for NGC 5194 753:extragalactic planet 695: 689:intrinsic brightness 468:In January 2005 the 389:was able to observe 371:reflecting telescope 7581:Astronomical events 6345:List of NGC objects 2605:Articles and images 2505:2000ApJS..128..431F 2449:2000ApJ...543..178G 2299:2021NatAs...5.1297D 2190:2019ApJ...880L..20J 2011:. Sky and Telescope 1972:2006MNRAS.369.1939S 1897:1992ApJ...385L..37K 1856:1988ApJ...327..671T 1800:2015ApJ...800L...3W 1675:2015ApJ...800...53H 1602:on January 10, 2019 1525:1998Obs...118..201G 1388:1929ApJ....69..103H 1135:1966ApJS...14....1A 1098:1987ApJ...314....3E 1059:1991rc3..book.....D 898:28th parallel south 741:candidate exoplanet 435:43rd parallel north 363:Messier's catalogue 323:amateur astronomers 3713:Caldwell catalogue 2042:on October 3, 2006 2005:"Supernova in M51" 1592:"Whirlpool Galaxy" 1214:Universe for Facts 792:astronomical units 717: 665:supernova impostor 661: 609:apparent magnitude 531: 491: 415: 355: 239:Other designations 155:Apparent magnitude 64:Observation data ( 21:Samsung Galaxy M51 7699:Peculiar galaxies 7630: 7629: 7612: 7611: 7571: 7570: 7530: 7529: 7179: 7178: 7153: 7152: 7127: 7126: 7114:HAT-P-36 (Tuiren) 6872: 6871: 6360: 6359: 3824: 3784: 3783: 3088: 3087: 2479:Determinations". 2351:978-0-521-35299-4 2283:(12): 1297–1307. 1021:. 6 October 2017. 940:978-0-933346-51-2 894:celestial equator 831:group of galaxies 685:interstellar dust 673:luminous red nova 639:yellow supergiant 623:type II supernova 621:On 31 May 2011 a 405:Visual appearance 391:Cepheid variables 349:Sketch of M51 by 307:. It lies in the 272: 271: 231:Interacting with 211: 160: 7756: 7739:Seyfert galaxies 7671: 7670: 7669: 7659: 7658: 7647: 7646: 7645: 7638: 7622: 7621: 7577: 7576: 7536: 7535: 7190: 7189: 7159: 7158: 7133: 7132: 7119:CWISE J1249+3621 6942: 6941: 6899: 6892: 6885: 6876: 6875: 6864:Whirlpool Galaxy 6789:Markarian 266 SW 6764:IRAS F01475-0740 6395:Seyfert galaxies 6393:List of notable 6387: 6380: 6373: 6364: 6363: 3820: 3811: 3804: 3797: 3788: 3787: 3774: 3764: 3763: 3754: 3753: 3700: 3115: 3108: 3101: 3092: 3091: 2637: 2630: 2623: 2614: 2613: 2525: 2524: 2498: 2496:astro-ph/9910501 2475: 2469: 2468: 2442: 2440:astro-ph/0001140 2420: 2414: 2413: 2391: 2385: 2384: 2362: 2356: 2355: 2333: 2327: 2326: 2292: 2277:Nature Astronomy 2268: 2262: 2261: 2259: 2257: 2240: 2234: 2233: 2218: 2212: 2211: 2201: 2183: 2159: 2153: 2152: 2150: 2148: 2133: 2126: 2120: 2119: 2117: 2116: 2105: 2099: 2098: 2096: 2095: 2080: 2074: 2073: 2071: 2070: 2058: 2052: 2051: 2049: 2047: 2038:. Archived from 2027: 2021: 2020: 2018: 2016: 2000: 1994: 1993: 1983: 1965: 1963:astro-ph/0604293 1956:(4): 1939–1948. 1939: 1933: 1932: 1930: 1928: 1917: 1911: 1910: 1908: 1876: 1870: 1869: 1867: 1833: 1827: 1826: 1824: 1822: 1793: 1769: 1758: 1757: 1719: 1710: 1709: 1707: 1705: 1668: 1659:(1): 5387–5394. 1644: 1638: 1637: 1635: 1633: 1618: 1612: 1611: 1609: 1607: 1588: 1582: 1581: 1555: 1553:astro-ph/0205553 1535: 1529: 1528: 1508: 1502: 1501: 1499: 1497:astro-ph/9704216 1487: 1481: 1480: 1478: 1476: 1465: 1459: 1458: 1456: 1454: 1449:. April 25, 2005 1435: 1429: 1428: 1408: 1402: 1401: 1399: 1365: 1359: 1355: 1344: 1328: 1322: 1321: 1309: 1303: 1302: 1300: 1298: 1277: 1268: 1267: 1252: 1246: 1245: 1243: 1242: 1230: 1224: 1223: 1221: 1220: 1206: 1200: 1199: 1173: 1153: 1147: 1146: 1116: 1110: 1109: 1080:Elmegreen, B. G. 1076:Elmegreen, D. M. 1072: 1063: 1062: 1046: 1037: 1036: 1029: 1023: 1022: 1015: 1009: 1008: 1006: 1004: 990: 945: 944: 918: 901: 890: 874:List of galaxies 835:Sunflower Galaxy 731:Planet candidate 726: 724: 723: 718: 707: 706: 588:Transient events 545:Spiral structure 539:ionization cones 488: 379:spiral structure 278:, also known as 276:Whirlpool Galaxy 228:Notable features 223: 127: 126: 122: 119: 95: 38: 29:Whirlpool Galaxy 26: 25: 7764: 7763: 7759: 7758: 7757: 7755: 7754: 7753: 7714:Messier objects 7679: 7678: 7677: 7667: 7665: 7653: 7643: 7641: 7633: 7631: 7626: 7608: 7567: 7540:Galaxy clusters 7526: 7460: 7439: 7231: 7175: 7149: 7123: 7092: 7074: 7026: 6968: 6931: 6908: 6903: 6873: 6868: 6759:IRAS 19014+4109 6754:IRAS 18325-5926 6749:IRAS 13197-1627 6744:IRAS 05189-2524 6719:Circinus Galaxy 6705: 6496:IRAS 13349+1428 6491:IRAS 13224-3809 6486:IRAS 07598+6508 6397: 6391: 6361: 6356: 6331: 3825: 3815: 3785: 3780: 3742: 3728:Index Catalogue 3701: 3692: 3124: 3122:Messier objects 3119: 3089: 3084: 3016: 2938: 2880: 2822: 2754: 2646: 2641: 2610: 2534: 2529: 2528: 2476: 2472: 2421: 2417: 2392: 2388: 2363: 2359: 2352: 2334: 2330: 2269: 2265: 2255: 2253: 2241: 2237: 2220: 2219: 2215: 2160: 2156: 2146: 2144: 2131: 2128: 2127: 2123: 2114: 2112: 2107: 2106: 2102: 2093: 2091: 2081: 2077: 2068: 2066: 2061:Bishop, David. 2059: 2055: 2045: 2043: 2030:Bishop, David. 2028: 2024: 2014: 2012: 2001: 1997: 1940: 1936: 1926: 1924: 1919: 1918: 1914: 1877: 1873: 1834: 1830: 1820: 1818: 1770: 1761: 1720: 1713: 1703: 1701: 1645: 1641: 1631: 1629: 1620: 1619: 1615: 1605: 1603: 1590: 1589: 1585: 1536: 1532: 1513:The Observatory 1509: 1505: 1488: 1484: 1474: 1472: 1467: 1466: 1462: 1452: 1450: 1437: 1436: 1432: 1409: 1405: 1366: 1362: 1329: 1325: 1310: 1306: 1296: 1294: 1278: 1271: 1254: 1253: 1249: 1240: 1238: 1231: 1227: 1218: 1216: 1208: 1207: 1203: 1154: 1150: 1117: 1113: 1073: 1066: 1047: 1040: 1031: 1030: 1026: 1017: 1016: 1012: 1002: 1000: 992: 991: 948: 941: 919: 915: 910: 905: 904: 891: 887: 882: 859: 823: 817: 806: 800: 747:, orbiting the 733: 702: 698: 696: 693: 692: 647:blue supergiant 590: 581: 573: 560: 547: 503: 496: 489: 486: 485: 439:right ascension 407: 398:radio astronomy 359:Charles Messier 343: 214: 195: 168:Characteristics 149: 146: 124: 120: 117: 115: 93: 89:Right ascension 59: 49: 24: 17: 12: 11: 5: 7762: 7752: 7751: 7746: 7741: 7736: 7731: 7726: 7721: 7716: 7711: 7709:Canes Venatici 7706: 7701: 7696: 7691: 7676: 7675: 7663: 7651: 7628: 7627: 7617: 7614: 7613: 7610: 7609: 7607: 7606: 7601: 7596: 7591: 7585: 7583: 7573: 7572: 7569: 7568: 7566: 7565: 7563:NGC 4631 Group 7560: 7555: 7550: 7548:Canes II Group 7544: 7542: 7532: 7531: 7528: 7527: 7525: 7524: 7519: 7514: 7509: 7504: 7499: 7494: 7489: 7484: 7479: 7474: 7468: 7466: 7462: 7461: 7459: 7458: 7453: 7447: 7445: 7441: 7440: 7438: 7437: 7432: 7427: 7422: 7417: 7412: 7407: 7402: 7397: 7392: 7387: 7382: 7377: 7372: 7367: 7362: 7357: 7352: 7347: 7342: 7337: 7332: 7327: 7322: 7317: 7312: 7307: 7302: 7297: 7292: 7287: 7282: 7277: 7272: 7267: 7262: 7257: 7252: 7247: 7241: 7239: 7233: 7232: 7230: 7229: 7224: 7219: 7214: 7213: 7212: 7207: 7198: 7196: 7187: 7181: 7180: 7177: 7176: 7174: 7173: 7167: 7165: 7155: 7154: 7151: 7150: 7148: 7147: 7141: 7139: 7129: 7128: 7125: 7124: 7122: 7121: 7116: 7111: 7106: 7100: 7098: 7094: 7093: 7091: 7090: 7084: 7082: 7076: 7075: 7073: 7072: 7067: 7062: 7057: 7052: 7047: 7045:Y (La Superba) 7042: 7036: 7034: 7028: 7027: 7025: 7024: 7019: 7014: 7009: 7004: 6999: 6994: 6989: 6984: 6978: 6976: 6970: 6969: 6967: 6966: 6961: 6959:α (Cor Caroli) 6956: 6950: 6948: 6939: 6933: 6932: 6930: 6929: 6924: 6919: 6913: 6910: 6909: 6902: 6901: 6894: 6887: 6879: 6870: 6869: 6867: 6866: 6861: 6856: 6851: 6846: 6841: 6836: 6831: 6826: 6821: 6819:Markarian 1210 6816: 6814:Markarian 1066 6811: 6806: 6801: 6796: 6791: 6786: 6781: 6776: 6771: 6766: 6761: 6756: 6751: 6746: 6741: 6736: 6731: 6726: 6721: 6715: 6713: 6707: 6706: 6704: 6703: 6698: 6693: 6688: 6683: 6678: 6673: 6671:PMN J0948+0022 6668: 6663: 6658: 6653: 6648: 6643: 6638: 6633: 6628: 6623: 6621:Markarian 1239 6618: 6616:Markarian 1044 6613: 6611:Markarian 1018 6608: 6603: 6598: 6593: 6588: 6583: 6578: 6573: 6568: 6563: 6558: 6553: 6548: 6543: 6538: 6533: 6528: 6523: 6518: 6513: 6508: 6503: 6498: 6493: 6488: 6483: 6478: 6473: 6468: 6463: 6458: 6453: 6448: 6443: 6438: 6433: 6428: 6423: 6418: 6413: 6407: 6405: 6399: 6398: 6390: 6389: 6382: 6375: 6367: 6358: 6357: 6355: 6354: 6353: 6352: 6342: 6336: 6333: 6332: 6330: 6329: 6324: 6319: 6314: 6309: 6304: 6299: 6294: 6289: 6284: 6279: 6274: 6269: 6264: 6259: 6254: 6249: 6244: 6239: 6234: 6229: 6224: 6219: 6214: 6209: 6204: 6199: 6194: 6189: 6184: 6179: 6174: 6169: 6164: 6159: 6154: 6149: 6144: 6139: 6134: 6129: 6124: 6119: 6114: 6109: 6104: 6099: 6094: 6089: 6084: 6079: 6074: 6069: 6064: 6059: 6054: 6049: 6044: 6039: 6034: 6029: 6024: 6019: 6014: 6009: 6004: 5999: 5994: 5989: 5984: 5979: 5974: 5969: 5964: 5959: 5954: 5949: 5944: 5939: 5934: 5929: 5924: 5919: 5914: 5909: 5904: 5899: 5894: 5889: 5884: 5879: 5874: 5869: 5864: 5859: 5854: 5849: 5844: 5839: 5834: 5829: 5824: 5819: 5814: 5809: 5804: 5799: 5794: 5789: 5784: 5779: 5774: 5769: 5764: 5759: 5754: 5749: 5744: 5739: 5734: 5729: 5724: 5719: 5714: 5709: 5704: 5699: 5694: 5689: 5684: 5679: 5674: 5669: 5664: 5659: 5654: 5649: 5644: 5639: 5634: 5629: 5624: 5619: 5614: 5609: 5604: 5599: 5594: 5589: 5584: 5579: 5574: 5569: 5564: 5559: 5554: 5549: 5544: 5539: 5534: 5529: 5524: 5519: 5514: 5509: 5504: 5499: 5494: 5489: 5484: 5479: 5474: 5469: 5464: 5459: 5454: 5449: 5444: 5439: 5434: 5429: 5424: 5419: 5414: 5409: 5404: 5399: 5394: 5389: 5384: 5379: 5374: 5369: 5364: 5359: 5354: 5349: 5344: 5339: 5334: 5329: 5324: 5319: 5314: 5309: 5304: 5299: 5294: 5289: 5284: 5279: 5274: 5269: 5264: 5259: 5254: 5249: 5244: 5239: 5234: 5229: 5224: 5219: 5214: 5209: 5204: 5199: 5194: 5189: 5184: 5179: 5174: 5169: 5164: 5159: 5154: 5149: 5144: 5139: 5134: 5129: 5124: 5119: 5114: 5109: 5104: 5099: 5094: 5089: 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4254: 4249: 4244: 4239: 4234: 4229: 4224: 4219: 4214: 4209: 4204: 4199: 4194: 4189: 4184: 4179: 4174: 4169: 4164: 4159: 4154: 4149: 4144: 4139: 4134: 4129: 4124: 4119: 4114: 4109: 4104: 4099: 4094: 4089: 4084: 4079: 4074: 4069: 4064: 4059: 4054: 4049: 4044: 4039: 4034: 4029: 4024: 4019: 4014: 4009: 4006: 4001: 3996: 3991: 3986: 3981: 3976: 3971: 3966: 3961: 3956: 3951: 3946: 3941: 3936: 3931: 3926: 3921: 3916: 3911: 3906: 3901: 3896: 3891: 3886: 3881: 3876: 3871: 3866: 3861: 3856: 3851: 3846: 3841: 3836: 3830: 3827: 3826: 3814: 3813: 3806: 3799: 3791: 3782: 3781: 3779: 3778: 3768: 3758: 3747: 3744: 3743: 3741: 3740: 3735: 3730: 3725: 3720: 3715: 3709: 3707: 3703: 3702: 3695: 3693: 3691: 3690: 3689: 3688: 3683: 3678: 3673: 3668: 3663: 3658: 3650: 3645: 3640: 3635: 3630: 3625: 3620: 3615: 3610: 3605: 3600: 3595: 3590: 3585: 3580: 3575: 3570: 3565: 3560: 3555: 3550: 3545: 3540: 3535: 3530: 3525: 3520: 3515: 3510: 3505: 3500: 3495: 3490: 3485: 3480: 3475: 3470: 3465: 3460: 3455: 3450: 3445: 3440: 3435: 3430: 3425: 3420: 3415: 3410: 3405: 3400: 3395: 3390: 3385: 3380: 3375: 3370: 3365: 3360: 3355: 3350: 3345: 3340: 3335: 3330: 3325: 3320: 3315: 3310: 3305: 3300: 3295: 3290: 3285: 3280: 3275: 3270: 3265: 3260: 3255: 3250: 3245: 3240: 3235: 3230: 3225: 3220: 3215: 3210: 3205: 3200: 3195: 3190: 3185: 3180: 3175: 3170: 3165: 3160: 3155: 3150: 3145: 3140: 3134: 3132: 3126: 3125: 3118: 3117: 3110: 3103: 3095: 3086: 3085: 3083: 3082: 3077: 3072: 3067: 3062: 3057: 3052: 3047: 3042: 3037: 3032: 3026: 3024: 3018: 3017: 3015: 3014: 3009: 3004: 2999: 2994: 2989: 2984: 2979: 2974: 2969: 2964: 2959: 2954: 2948: 2946: 2940: 2939: 2937: 2936: 2931: 2926: 2921: 2916: 2911: 2906: 2901: 2896: 2890: 2888: 2882: 2881: 2879: 2878: 2873: 2868: 2863: 2858: 2853: 2848: 2843: 2838: 2832: 2830: 2824: 2823: 2821: 2820: 2815: 2810: 2805: 2800: 2795: 2790: 2785: 2780: 2775: 2770: 2764: 2762: 2756: 2755: 2753: 2752: 2747: 2742: 2737: 2732: 2727: 2722: 2717: 2712: 2707: 2702: 2697: 2692: 2687: 2682: 2677: 2672: 2667: 2662: 2656: 2654: 2648: 2647: 2640: 2639: 2632: 2625: 2617: 2608: 2607: 2565: 2560: 2555: 2550: 2545: 2540: 2533: 2532:External links 2530: 2527: 2526: 2513:10.1086/313391 2489:(2): 431–459. 2470: 2457:10.1086/317070 2433:(1): 178–194. 2415: 2386: 2357: 2350: 2328: 2263: 2235: 2228:. 2021-10-25. 2213: 2154: 2121: 2100: 2075: 2053: 2036:supernovae.net 2022: 1995: 1934: 1912: 1906:10.1086/186272 1871: 1865:10.1086/166224 1828: 1759: 1711: 1639: 1613: 1583: 1546:(2): 519–530. 1530: 1503: 1482: 1460: 1430: 1403: 1397:10.1086/143167 1360: 1358: 1357: 1345: 1323: 1304: 1269: 1266:on 2016-10-28. 1247: 1225: 1201: 1148: 1143:10.1086/190147 1111: 1106:10.1086/165034 1064: 1038: 1024: 1010: 946: 939: 912: 911: 909: 906: 903: 902: 884: 883: 881: 878: 877: 876: 871: 866: 858: 855: 851:NGC 5866 Group 819:Main article: 816: 813: 802:Main article: 799: 796: 732: 729: 716: 713: 710: 705: 701: 589: 586: 580: 579:Star formation 577: 559: 558:Tidal features 556: 546: 543: 501: 495: 492: 474:ACS instrument 419:Canes Venatici 406: 403: 396:The advent of 383:spiral nebulae 342: 339: 312:Canes Venatici 270: 269: 241: 240: 236: 235: 229: 225: 224: 212: 202: 201: 184: 180: 179: 176: 170: 169: 165: 164: 161: 151: 150: 135: 129: 128: 113: 107: 106: 103: 97: 96: 91: 85: 84: 82:Canes Venatici 79: 73: 72: 61: 60: 39: 31: 30: 15: 9: 6: 4: 3: 2: 7761: 7750: 7747: 7745: 7742: 7740: 7737: 7735: 7732: 7730: 7727: 7725: 7722: 7720: 7717: 7715: 7712: 7710: 7707: 7705: 7702: 7700: 7697: 7695: 7692: 7690: 7687: 7686: 7684: 7674: 7664: 7662: 7657: 7652: 7650: 7640: 7639: 7636: 7625: 7615: 7605: 7602: 7600: 7597: 7595: 7592: 7590: 7587: 7586: 7584: 7582: 7578: 7574: 7564: 7561: 7559: 7556: 7554: 7551: 7549: 7546: 7545: 7543: 7541: 7537: 7533: 7523: 7520: 7518: 7515: 7513: 7510: 7508: 7505: 7503: 7500: 7498: 7495: 7493: 7490: 7488: 7485: 7483: 7480: 7478: 7475: 7473: 7470: 7469: 7467: 7463: 7457: 7454: 7452: 7449: 7448: 7446: 7442: 7436: 7433: 7431: 7428: 7426: 7423: 7421: 7418: 7416: 7413: 7411: 7408: 7406: 7403: 7401: 7398: 7396: 7393: 7391: 7388: 7386: 7383: 7381: 7378: 7376: 7373: 7371: 7368: 7366: 7363: 7361: 7358: 7356: 7353: 7351: 7348: 7346: 7343: 7341: 7338: 7336: 7333: 7331: 7328: 7326: 7323: 7321: 7318: 7316: 7313: 7311: 7308: 7306: 7303: 7301: 7298: 7296: 7293: 7291: 7288: 7286: 7283: 7281: 7278: 7276: 7273: 7271: 7268: 7266: 7263: 7261: 7258: 7256: 7253: 7251: 7248: 7246: 7243: 7242: 7240: 7238: 7234: 7228: 7225: 7223: 7220: 7218: 7215: 7211: 7208: 7206: 7203: 7202: 7200: 7199: 7197: 7195: 7191: 7188: 7186: 7182: 7172: 7169: 7168: 7166: 7164: 7163:Star clusters 7160: 7156: 7146: 7143: 7142: 7140: 7138: 7134: 7130: 7120: 7117: 7115: 7112: 7110: 7107: 7105: 7102: 7101: 7099: 7095: 7089: 7086: 7085: 7083: 7081: 7077: 7071: 7068: 7066: 7063: 7061: 7058: 7056: 7053: 7051: 7048: 7046: 7043: 7041: 7038: 7037: 7035: 7033: 7029: 7023: 7020: 7018: 7015: 7013: 7010: 7008: 7005: 7003: 7000: 6998: 6995: 6993: 6990: 6988: 6985: 6983: 6980: 6979: 6977: 6975: 6971: 6965: 6962: 6960: 6957: 6955: 6952: 6951: 6949: 6947: 6943: 6940: 6938: 6934: 6928: 6925: 6923: 6920: 6918: 6915: 6914: 6911: 6907: 6900: 6895: 6893: 6888: 6886: 6881: 6880: 6877: 6865: 6862: 6860: 6857: 6855: 6852: 6850: 6847: 6845: 6842: 6840: 6837: 6835: 6832: 6830: 6827: 6825: 6822: 6820: 6817: 6815: 6812: 6810: 6809:Markarian 573 6807: 6805: 6804:Markarian 477 6802: 6800: 6799:Markarian 463 6797: 6795: 6794:Markarian 273 6792: 6790: 6787: 6785: 6784:Markarian 176 6782: 6780: 6777: 6775: 6772: 6770: 6767: 6765: 6762: 6760: 6757: 6755: 6752: 6750: 6747: 6745: 6742: 6740: 6737: 6735: 6732: 6730: 6727: 6725: 6722: 6720: 6717: 6716: 6714: 6712: 6708: 6702: 6699: 6697: 6694: 6692: 6689: 6687: 6684: 6682: 6679: 6677: 6674: 6672: 6669: 6667: 6664: 6662: 6659: 6657: 6654: 6652: 6649: 6647: 6644: 6642: 6639: 6637: 6634: 6632: 6629: 6627: 6624: 6622: 6619: 6617: 6614: 6612: 6609: 6607: 6606:Markarian 993 6604: 6602: 6601:Markarian 896 6599: 6597: 6596:Markarian 841 6594: 6592: 6591:Markarian 817 6589: 6587: 6586:Markarian 705 6584: 6582: 6581:Markarian 704 6579: 6577: 6576:Markarian 618 6574: 6572: 6571:Markarian 609 6569: 6567: 6566:Markarian 509 6564: 6562: 6561:Markarian 507 6559: 6557: 6556:Markarian 478 6554: 6552: 6551:Markarian 423 6549: 6547: 6546:Markarian 376 6544: 6542: 6541:Markarian 359 6539: 6537: 6536:Markarian 335 6534: 6532: 6531:Markarian 334 6529: 6527: 6526:Markarian 315 6524: 6522: 6521:Markarian 279 6519: 6517: 6516:Markarian 110 6514: 6512: 6509: 6507: 6504: 6502: 6499: 6497: 6494: 6492: 6489: 6487: 6484: 6482: 6479: 6477: 6474: 6472: 6469: 6467: 6464: 6462: 6459: 6457: 6454: 6452: 6449: 6447: 6444: 6442: 6439: 6437: 6434: 6432: 6429: 6427: 6424: 6422: 6419: 6417: 6416:Arakelian 564 6414: 6412: 6411:Arakelian 120 6409: 6408: 6406: 6404: 6400: 6396: 6388: 6383: 6381: 6376: 6374: 6369: 6368: 6365: 6351: 6348: 6347: 6346: 6343: 6341: 6338: 6337: 6334: 6328: 6325: 6323: 6320: 6318: 6315: 6313: 6310: 6308: 6305: 6303: 6300: 6298: 6295: 6293: 6290: 6288: 6285: 6283: 6280: 6278: 6275: 6273: 6270: 6268: 6265: 6263: 6260: 6258: 6255: 6253: 6250: 6248: 6245: 6243: 6240: 6238: 6235: 6233: 6230: 6228: 6225: 6223: 6220: 6218: 6215: 6213: 6210: 6208: 6205: 6203: 6200: 6198: 6195: 6193: 6190: 6188: 6185: 6183: 6180: 6178: 6175: 6173: 6170: 6168: 6165: 6163: 6160: 6158: 6155: 6153: 6150: 6148: 6145: 6143: 6140: 6138: 6135: 6133: 6130: 6128: 6125: 6123: 6120: 6118: 6115: 6113: 6110: 6108: 6105: 6103: 6100: 6098: 6095: 6093: 6090: 6088: 6085: 6083: 6080: 6078: 6075: 6073: 6070: 6068: 6065: 6063: 6060: 6058: 6055: 6053: 6050: 6048: 6045: 6043: 6040: 6038: 6035: 6033: 6030: 6028: 6025: 6023: 6020: 6018: 6015: 6013: 6010: 6008: 6005: 6003: 6000: 5998: 5995: 5993: 5990: 5988: 5985: 5983: 5980: 5978: 5975: 5973: 5970: 5968: 5965: 5963: 5960: 5958: 5955: 5953: 5950: 5948: 5945: 5943: 5940: 5938: 5935: 5933: 5930: 5928: 5925: 5923: 5920: 5918: 5915: 5913: 5910: 5908: 5905: 5903: 5900: 5898: 5895: 5893: 5890: 5888: 5885: 5883: 5880: 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555: 553: 542: 540: 536: 527: 523: 521: 517: 513: 509: 505: 481: 477: 475: 471: 466: 462: 460: 456: 451: 446: 444: 440: 436: 432: 428: 424: 420: 411: 402: 399: 394: 392: 388: 384: 380: 376: 372: 368: 364: 360: 352: 347: 338: 336: 332: 328: 324: 320: 315: 313: 310: 309:constellation 306: 303: 299: 298:spiral galaxy 296: 293: 289: 285: 281: 277: 267: 263: 259: 255: 251: 247: 242: 237: 234: 230: 226: 222: 218: 213: 207: 206:Apparent size 203: 199: 193: 190:(76,900  189: 185: 181: 177: 175: 171: 166: 162: 156: 152: 148: 144: 140: 136: 134: 130: 114: 112: 108: 104: 102: 98: 92: 90: 86: 83: 80: 78: 77:Constellation 74: 70: 67: 62: 57: 53: 47: 43: 37: 32: 27: 22: 7204: 6863: 6779:Markarian 78 6774:Markarian 34 6681:SBS 0846+513 6676:RE J0134+396 6666:PKS 0558-504 6636:MGC +8-11-11 6626:MCG -2-58-22 6511:Markarian 79 6506:Markarian 50 6441:ESO 323-G077 4801: 3822:5000 to 5499 3821: 3387: 3054: 2981: 2913: 2855: 2792: 2704: 2609: 2486: 2480: 2473: 2430: 2424: 2418: 2401: 2395: 2389: 2372: 2366: 2360: 2337: 2331: 2280: 2276: 2266: 2256:25 September 2254:. Retrieved 2248: 2238: 2225: 2216: 2174:(L20): L20. 2171: 2167: 2157: 2145:. Retrieved 2137: 2124: 2113:. Retrieved 2103: 2092:. Retrieved 2078: 2067:. Retrieved 2056: 2044:. Retrieved 2040:the original 2035: 2025: 2013:. Retrieved 2008: 1998: 1953: 1947: 1937: 1927:February 27, 1925:. Retrieved 1915: 1888: 1884: 1874: 1847: 1841: 1831: 1821:November 18, 1819:. Retrieved 1781: 1777: 1729: 1723: 1704:November 10, 1702:. Retrieved 1656: 1652: 1642: 1630:. Retrieved 1625: 1616: 1604:. Retrieved 1600:the original 1595: 1586: 1543: 1539: 1533: 1516: 1512: 1506: 1485: 1475:September 6, 1473:. Retrieved 1463: 1451:. Retrieved 1442: 1433: 1416: 1412: 1406: 1379: 1373: 1363: 1350: 1340: 1326: 1317: 1307: 1295:. Retrieved 1285: 1264:the original 1259: 1250: 1239:. Retrieved 1228: 1217:. Retrieved 1213: 1204: 1161: 1157: 1151: 1126: 1120: 1114: 1089: 1083: 1050: 1027: 1013: 1001:. Retrieved 997: 922: 916: 888: 824: 807: 773:neutron star 769:X-ray source 756: 744: 734: 662: 620: 613: 598: 591: 582: 572: 561: 548: 532: 497: 467: 463: 447: 416: 395: 387:Edwin Hubble 356: 316: 295:grand-design 287: 283: 279: 275: 273: 147: 7734:Arp objects 7724:UGC objects 7719:NGC objects 7673:Outer space 7589:GRB 090429B 7507:I Zwicky 36 6839:Messier 106 6824:MCG-5-23-16 6769:Markarian 3 6729:ESO 428-G14 6724:ESO 103-G35 6661:PG 1404+226 6656:PG 1402+261 6651:PG 1244+026 6646:PG 1211+143 6631:MCG-6-30-15 6501:Markarian 6 6471:1H 1707-495 6466:1H 0419-577 6436:ESO 198-G24 6431:ESO 141-055 2375:: 211–233. 2009:Sky Tonight 1850:: 671–679. 1732:: 663–664. 1626:News Center 1606:October 11, 1519:: 201–208. 1443:News Center 1419:: 187–204. 1382:: 103–158. 1297:October 11, 1035:. SEDS.org. 1003:December 6, 863:Messier 101 755:, a planet 568:light-years 564:kiloparsecs 512:light-years 508:kiloparsecs 455:HII regions 431:circumpolar 375:Birr Castle 331:spiral arms 292:interacting 280:Messier 51a 196:(diameter; 186:23.58  178:SA(s)bc pec 143:light-years 139:megaparsecs 101:Declination 7683:Categories 7137:Exoplanets 7104:Gliese 521 6922:Giant Void 6834:Messier 88 6829:Messier 77 6641:Messier 81 6456:Fairall 51 6446:ESO 362-18 2597:Astrophoto 2589:Hydrogen α 2290:2009.08987 2181:1904.07857 2115:2011-06-06 2094:2011-06-06 2069:2011-06-06 1791:1501.04599 1447:HubbleSite 1241:2021-01-20 1219:2014-12-21 908:References 847:M101 Group 829:, a small 784:supergiant 777:black hole 745:M51-ULS-1b 669:AT 2019abn 641:and not a 594:supernovae 535:black hole 494:Properties 450:binoculars 423:Big Dipper 351:Lord Rosse 327:binoculars 94:13 29 52.7 7704:M51 Group 7649:Astronomy 7604:SN 2008ax 7599:SN 2005cs 7558:M94 Group 7553:M51 Group 7517:4C +41.26 7171:Messier 3 7145:HAT-P-12b 6974:Flamsteed 6964:β (Chara) 6859:NGC 4922N 6854:NGC 4676B 6849:NGC 2788A 6711:Seyfert 2 6701:III Zw 77 6461:H0557-385 6451:Fairall 9 6403:Seyfert 1 6350:5001–6000 2876:PGC 47408 2871:PGC 47407 2866:PGC 47406 2861:PGC 47405 2856:PGC 47404 2851:PGC 47403 2846:PGC 47402 2841:PGC 47401 2836:PGC 47400 2521:121612286 2404:: 47–90. 2323:239892362 2315:2397-3366 2208:119110002 2147:24 August 2046:August 7, 2015:August 7, 1990:119510845 1816:118603790 1754:189838328 1699:118666575 1666:1412.1012 1632:August 7, 1453:August 7, 1171:0704.0947 827:M51 Group 821:M51 Group 798:Companion 761:Milky Way 712:− 627:SN 2011dh 616:SN 2005cs 599:In 1994, 566:(140,000 516:Milky Way 341:Discovery 302:Seyfert 2 7624:Category 7594:SN 1994I 7444:Numbered 7185:Galaxies 7109:HAT-P-12 7032:Variable 6844:NGC 454E 6696:III Zw 2 6686:Ton S180 6481:IC 4329A 6421:Arp 102B 3756:Category 3706:See also 2934:UGC 8497 2929:UGC 8496 2924:UGC 8495 2919:UGC 8494 2914:UGC 8493 2909:UGC 8492 2904:UGC 8491 2899:UGC 8490 2894:UGC 8489 2818:NGC 5199 2813:NGC 5198 2808:NGC 5197 2803:NGC 5196 2798:NGC 5195 2793:NGC 5194 2788:NGC 5193 2783:NGC 5192 2778:NGC 5191 2773:NGC 5190 2768:NGC 5189 2230:Archived 2226:BBC News 2134:2019abn" 1784:(1): 7. 1578:17813024 1425:60627567 1196:15471799 857:See also 849:and the 843:NGC 5229 839:NGC 5023 809:NGC 5195 804:NGC 5195 765:eclipses 743:, named 601:SN 1994I 552:NGC 5195 510:(76,900 504:isophote 365:as M51. 335:NGC 5195 319:NGC 5195 290:, is an 288:NGC 5194 233:NGC 5195 133:Distance 111:Redshift 46:NGC 5195 7635:Portals 7522:TON 618 7502:IC 4271 7497:IC 4182 7487:DDO 169 7194:Messier 6739:IC 3639 6734:IC 2560 6476:IC 3599 3766:Commons 3080:GC 3577 3075:GC 3576 3070:GC 3575 3065:GC 3574 3060:GC 3573 3055:GC 3572 3050:GC 3571 3045:GC 3570 3040:GC 3569 3035:GC 3568 3030:GC 3567 2652:Messier 2601:Sky Map 2569:WikiSky 2501:Bibcode 2465:9618325 2445:Bibcode 2406:Bibcode 2377:Bibcode 2295:Bibcode 2186:Bibcode 1968:Bibcode 1893:Bibcode 1852:Bibcode 1796:Bibcode 1734:Bibcode 1671:Bibcode 1558:Bibcode 1521:Bibcode 1384:Bibcode 1176:Bibcode 1131:Bibcode 1094:Bibcode 1092:: 3–9. 1055:Bibcode 767:of the 757:outside 631:P Cygni 611:12.91. 605:type Ic 353:in 1845 300:with a 66:J2000.0 7512:KKR 03 7492:IC 883 7482:3C 288 7477:3C 286 7472:3C 285 6691:I Zw 1 3776:Portal 3652:Added 3012:Arp 91 3007:Arp 90 3002:Arp 89 2997:Arp 88 2992:Arp 87 2987:Arp 86 2982:Arp 85 2977:Arp 84 2972:Arp 83 2967:Arp 82 2962:Arp 81 2957:Arp 80 2952:Arp 79 2519:  2463:  2348:  2321:  2313:  2206:  2132:  1988:  1814:  1752:  1697:  1689:  1576:  1423:  1256:"M 51" 1237:. NASA 1194:  937:  841:, and 788:Saturn 781:B-type 681:Hubble 592:Three 518:. Its 443:Gemini 427:Alkaid 256:8493, 252:5194, 208:  157:  48:(M51b) 7661:Stars 7465:Other 7097:Other 6946:Bayer 6937:Stars 6426:3C 59 2593:X-Ray 2581:GALEX 2517:S2CID 2491:arXiv 2461:S2CID 2435:arXiv 2319:S2CID 2285:arXiv 2204:S2CID 2176:arXiv 2089:AAVSO 1986:S2CID 1958:arXiv 1891:: 4. 1812:S2CID 1786:arXiv 1750:S2CID 1695:S2CID 1661:arXiv 1574:S2CID 1548:arXiv 1492:arXiv 1192:S2CID 1166:arXiv 1129:: 1. 1033:"M51" 880:Notes 775:or a 739:of a 286:) or 248:51a, 219:Ă— 6.9 123:0.000 116:0.001 69:epoch 7435:5394 7430:5371 7425:5273 7420:5238 7415:5229 7410:5223 7405:5112 7400:5033 7395:5023 7390:5005 7385:5003 7380:5002 7375:4861 7370:4800 7365:4707 7360:4657 7355:4656 7350:4631 7345:4627 7340:4625 7335:4618 7330:4534 7325:4490 7320:4485 7315:4449 7310:4401 7305:4400 7300:4399 7295:4395 7290:4244 7285:4242 7280:4217 7275:4214 7270:4183 7265:4163 7260:4151 7255:4145 7250:4138 7245:4111 7088:4997 6327:5499 6322:5498 6317:5497 6312:5496 6307:5495 6302:5494 6297:5493 6292:5492 6287:5491 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3638:M101 3633:M100 3130:List 2585:IRAS 2577:SDSS 2573:DSS2 2346:ISBN 2311:ISSN 2258:2020 2149:2024 2048:2006 2017:2006 1929:2016 1823:2022 1706:2022 1687:PMID 1634:2006 1608:2018 1477:2021 1455:2006 1421:OCLC 1299:2018 1292:NASA 1005:2006 935:ISBN 759:the 715:14.9 520:mass 459:M51B 284:M51a 274:The 268:3572 264:85, 215:11.2 183:Size 174:Type 52:NASA 7237:NGC 7227:106 7201:51 3628:M99 3623:M98 3618:M97 3613:M96 3608:M95 3603:M94 3598:M93 3593:M92 3588:M91 3583:M90 3578:M89 3573:M88 3568:M87 3563:M86 3558:M85 3553:M84 3548:M83 3543:M82 3538:M81 3533:M80 3528:M79 3523:M78 3518:M77 3513:M76 3508:M75 3503:M74 3498:M73 3493:M72 3488:M71 3483:M70 3478:M69 3473:M68 3468:M67 3463:M66 3458:M65 3453:M64 3448:M63 3443:M62 3438:M61 3433:M60 3428:M59 3423:M58 3418:M57 3413:M56 3408:M55 3403:M54 3398:M53 3393:M52 3388:M51 3383:M50 3378:M49 3373:M48 3368:M47 3363:M46 3358:M45 3353:M44 3348:M43 3343:M42 3338:M41 3333:M40 3328:M39 3323:M38 3318:M37 3313:M36 3308:M35 3303:M34 3298:M33 3293:M32 3288:M31 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Index

Samsung Galaxy M51

European Space Agency
NGC 5195
NASA
ESA
J2000.0
epoch
Constellation
Canes Venatici
Right ascension
Declination
Redshift
Distance
megaparsecs
light-years
Apparent magnitude
Type
kpc
ly
25.0 mag/arcsec B-band isophote
Apparent size
′
′
NGC 5195
M
NGC
UGC
PGC
Arp

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