Virgo cluster


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Virgo cluster

A giant irregular cluster of galaxies lying near the north galactic pole in the constellation Virgo. It is the nearest large cluster: its distance is currently estimated as 15 megaparsecs. Some 2500 galaxies have been observed of which about 75% are spirals, the remainder being mainly ellipticals with a few irregulars. Its second-brightest member, the giant elliptical galaxy M87, is both a radio source (Virgo A) and an X-ray source (Virgo X-1). The X-ray halo around M87 is taking part in a weak cooling flow of around 10 solar masses a year. A second large elliptical galaxy in Virgo, M86, is also an X-ray source, with the X-ray emission forming a plume directed away from the center of the galaxy. This is due to the hot gas being stripped from the galaxy by ram pressure as it falls into the cluster. The Virgo cluster is the center of the Local Supercluster, which exerts a significant gravitational pull on the Local Group of galaxies, reducing the measured recession velocity of the Virgo cluster by some 250 km s–1 (to about 1000 km s–1).
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

Virgo cluster

[′vər·gō ‚kləs·tər]
(astronomy)
A cluster of galaxies which is the nearest to the galaxy that includes the sun; the cluster is centered in the constellation Virgo and is about 1.6 × 107 light-years (1.51 × 1023 m) from earth.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The new study shows that roughly half of this motion is generated "locally" from the combination of a pull from the massive nearby Virgo Cluster and our participation in the expansion of the Local Void as it becomes ever emptier.
Scientists describe Messier 90 as one of the largest and brightest spirals in the Virgo Cluster. "The galaxy has an absolute magnitude of -22, which makes it intrinsically brighter than Andromeda (M31)," it said.
The supermassive beast at the heart of galaxy Messier 87, in the Virgo cluster, is three million times the size of the Earth and capable of swallowing stars.
This plane nearly coincides with the so-called supergalactic plane, which includes the Virgo Cluster. In supergalactic coordinates, the SGX and SGY coordinates describe the supergalactic plane, and SGZ is perpendicular to it.
These telescopes will collect radio waves emitting from Sgr A, as well as the neighbouring galaxy Messier 87, a huge elliptical galaxy in the nearby Virgo Cluster, and stitch them together into visual images.
Astronomer Christopher Mihos of Case Western Reserve University in Cleveland and colleagues, reporting in 2015 in Astrophysical Journal Letters, found three more in the Virgo cluster, a more sparsely populated but closer gathering of galaxies that's a mere 54 million light-years away.
M87 resides at the center of the neighboring Virgo cluster of roughly 2,000 galaxies, located 50 million light years away.
Callum finished the Sky Notes with a few deepsky images, including Hoag's Object, Abell 2218 and the Virgo cluster.
Organized by measurement techniques appropriate for distance ranges, the work covers processes for examining the solar system, the Milky Way and the Local Group, the Virgo Cluster, and the space between nearby galaxy clusters and cosmological distances.
If Earth was sucked into the black hole of the Virgo cluster, maybe we'd be spat out at the other end and have to go through customs in an alternative universe.
Consequently, "Hubble 3D" comes as close as any film to reproducing the curious, cosmic sensation of floating through outer space; with the bonus of the telescope's infrared camera and ultrasharp focus, pic affords tremendous views of everything from the young stars emerging from the Orion Nebula to a black hole in the more distant Virgo Cluster.