Virgo cluster

(redirected from Virgo cluster of galaxies)

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).

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.
References in periodicals archive ?
The reverse side features detailed maps of the Virgo Cluster of galaxies and two of the more challenging targets, as well as a reference table with additional information.
But in the Virgo cluster of galaxies they found a mass of hydrogen atoms 100 million times the mass of the Sun.
The Sombrero is one of the most massive objects at the southern edge of the Virgo cluster of galaxies.
In 2000, Minchin's team noticed two apparently isolated hydrogen clouds in a radio telescope survey of the Virgo Cluster of galaxies.
Located in the Virgo Cluster of galaxies, M61 is a barred spiral that displays many pinkish star-forming regions in this deep-color image.
A university spokesman said that in the Virgo cluster of galaxies - a group of galaxies about 50 million light years away - the scientists had found a mass of hydrogen atoms a hundred million times the mass of the sun.
and her colleagues announced a new distance to the galaxy M100, a member of the Virgo cluster of galaxies, based on Hubble Space Telescope observations.
In late April (when this magazine reaches many readers) Tempel 1 should be 10th or 11th magnitude in northern-most Virgo, north of brilliant Jupiter and just east of the Virgo Cluster of galaxies, as shown on the next page.
But scientists now report that they have seen Cepheids in the Virgo cluster of galaxies -- roughly twice as far from Earth.
Here in the heart of the Virgo Cluster of galaxies, even small scopes can play the game.
These include two clouds that lie a mere 30 million light-years from the Milky Way and appear associated with the Virgo cluster of galaxies.
Scan from the nearest star cluster, and one of the very nearest stars, out to the Virgo Cluster of galaxies.