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411 समाचार
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411 REFERENCE · Wikibooks

Messier Index/M91

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Messier 91 File:Messier91.jpg Spiral Galaxy M91. Atlas Image courtesy of 2MASS/UMass/IPAC-Caltech/NASA/NSF. J2000 SBb(rs)NASA/IPAC Extragalactic Database Results for NGC 4548 http://nedwww.ipac.caltech.edu/ 2006-12-13 12 35 26.4 +14 29 47 63 ± 16 Mly (19 ± 5 Mpc)J. L. Tonry, A. Dressler, J. P. Blakeslee, E. A. Ajhar, A. B. Fletcher, G. A. Luppino, M. R. Metzger, C. B. Moore The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances Astrophysical Journal 2001 546 2 681–693 http://adsabs.harvard.edu/abs/2001ApJ...546..681T 10.1086/318301 486 ± 4 km/s 11.0 5′.4 × 4′.3 Coma Berenices NGC 4548, UGC 7753, PGC 41934 Messier 91 (also known as NGC 4548) is a barred spiral galaxy about 63 million light-years away in the constellation Coma Berenices. It was most probably discovered by Charles Messier in 1781 and independently rediscovered by William Herschel on April 8, 1784. M91 is a member of the Virgo Cluster of galaxies. External links SEDS Messier: Spiral Galaxy M91 References