Back Virgo-sterrestelselswerm Afrikaans عنقود العذراء المجري Arabic Скопішча Дзевы Byelorussian Skup Virgo BS Cúmul de la Verge Catalan Kupa galaxií v Panně Czech Virgohoben Danish Virgo-Galaxienhaufen German Fitùm dla Vìrgin EML Cúmulo de Virgo Spanish
| Virgo Cluster | |
|---|---|
 Virgo Cluster showing the diffuse light between member galaxies. Messier 87 is the largest galaxy (lower left). | |
| Observation data (Epoch J2000) | |
| Constellation(s) | Virgo & Coma Berenices |
| Right ascension | 12h 27m [1] |
| Declination | +12° 43′[1] |
| Brightest member | Messier 49 |
| Number of galaxies | ~1,500[1] |
| Parent structure | Virgo Supercluster |
| Bautz–Morgan classification | III[1] |
| Binding mass | 1015 M☉ |
The Virgo Cluster is a cluster of galaxies whose center is 53.8 ± 0.3 Mly (16.5 ± 0.1 Mpc)[2] away in the constellation Virgo. Comprising approximately 1,300 (and possibly up to 2,000) member galaxies,[3] the cluster forms the heart of the larger Virgo Supercluster, of which the Local Group (containing the Milky Way galaxy) is a member. The Local Group actually experiences the mass of the Virgo Supercluster as the Virgocentric flow. It is estimated that the Virgo Cluster's mass is 1.2×1015 M☉ out to 8 degrees of the cluster's center or a radius of about 2.2 Mpc.[4]
Many of the brighter galaxies in this cluster, including the giant elliptical galaxy Messier 87, were discovered in the late 1770s and early 1780s and subsequently included in Charles Messier's catalogue of non-cometary fuzzy objects. Described by Messier as nebulae without stars, their true nature was not recognized until the 1920s.[A]
The cluster extends across approximately 8 degrees centered in the constellation Virgo. Some of its most prominent members can be seen with binoculars and small telescopes, while a 6-inch telescope will reveal about 160 of the cluster's galaxies on a clear night. Its brightest member is the elliptical galaxy Messier 49.[6]
- ^ a b c d "NASA/IPAC Extragalactic Database". Results for Virgo Cluster. Retrieved 2006-10-19.
- ^ Mei, Simona; Blakeslee, John P.; Côté, Patrick; Tonry, John L.; West, Michael J.; Ferrarese, Laura; Jordán, Andrés; Peng, Eric W.; Anthony, André; Merritt, Davi (2007). "The ACS Virgo Cluster Survey. XIII. SBF Distance Catalog and the Three-dimensional Structure of the Virgo Cluster". The Astrophysical Journal. 655 (1): 144–162. arXiv:astro-ph/0702510. Bibcode:2007ApJ...655..144M. doi:10.1086/509598. S2CID 16483538.
- ^ "Virgo Cluster". Cosmos. Swinburne University of Technology.
- ^ Fouqué, P.; Solanes, J. M.; Sanchis, T.; Balkowski, C. (2001). "Structure, mass and distance of the Virgo cluster from a Tolman-Bondi model". Astronomy and Astrophysics. 375 (3): 770–780. arXiv:astro-ph/0106261. Bibcode:2001A&A...375..770F. doi:10.1051/0004-6361:20010833. S2CID 10468717.
- ^ "Messier 91 — Observations and Descriptions". SEDS.
- ^ "Virgo Cluster | Messier Objects". www.messier-objects.com. 9 August 2017. Retrieved 2018-06-24.
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