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Topic: Local Supercluster


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In the News (Thu 20 Jun 19)

  
  The Universe within 1 billion Light Years - The Neighbouring Superclusters
The name given to the local supercluster because it is dominated by the large Virgo cluster.
This is a fairly weak supercluster that marks one end of a long wall of galaxies that encompasses the Centaurus supercluster and probably the Virgo supercluster as well.
The Shapley supercluster is a massive supercluster and many studies have been carried out on it and although it is not the biggest supercluster known, it is certainly one of the densest.
www.ldps.ws /Mirror/Universe/superc.html   (1182 words)

  
 Galaxy - MSN Encarta
The Virgo cluster is at or near the center of the Local Supercluster, and its gravitational pull on the Local Group is making this group recede more slowly than the expansion of the universe would normally cause it to recede.
Overall, the distribution of clusters and superclusters in the universe is not uniform.
Instead, superclusters of tens of thousands of galaxies are arranged in long, stringy, lacelike filaments, arranged around large voids.
encarta.msn.com /encyclopedia_761553870_2/Galaxy.html   (1054 words)

  
 Conclusions
The Local Supercluster is mostly a large filament going along the line Virgo - Ursa Major.
Never ever use spherical infall model for the Local Supercluster unless the line of sight is directly to the Virgo cluster.
Local Group is in a small filament going just in the direction of the Virgo.
astro.nmsu.edu /~aklypin/Talks/LocalSupercluster/conclusions.htm   (246 words)

  
 Virgo Supercluster   (Site not responding. Last check: 2007-11-02)
The Virgo Supercluster or Local Supercluster is the supercluster of galaxies that contains the Local Group and with it our galaxy, the Milky Way.
The Local Group is located near the edge and is drawn towards the Virgo cluster.
As its luminosity is far too small for this number of stars, it is thought that a large part of its mass is dark matter.
publicliterature.org /en/wikipedia/v/vi/virgo_supercluster.html   (178 words)

  
 Supercluster   (Site not responding. Last check: 2007-11-02)
The superclusters dictates that the galaxies in our Universe are not uniformly distributed; most of them are grouped together in groups and clusters, with groups containing up to 50 and clusters several thousand galaxies.
No clusters of superclusters are known, but the existence of bigger structures than supercluster is debated (see Filament (astronomy)).
Even though superclusters are the largest structures confirmed, the total number of superclusters leave possibilities for structural distribution; the total number of superclusters in the universe is believed to be close to 10 million.
supercluster.kiwiki.homeip.net   (334 words)

  
 Mapping the universe in three dimensions -- Haynes 93 (25): 14216 -- Proceedings of the National Academy of Sciences   (Site not responding. Last check: 2007-11-02)
Local Supercluster in the Virgo region is clearly noticeable.
supercluster from the Local Supercluster in the foreground and
The structure of the local universe as revealed from the galaxy distribution is topologically complex.
www.pnas.org /cgi/content/full/93/25/14216   (2690 words)

  
 The Southern Supercluster   (Site not responding. Last check: 2007-11-02)
The densest region of the supercluster lies between supergalactic longitudes 200° to 310° and supergalactic latitudes -38° to -45° which correspond to right ascensions of 2 hours to 6 hours and declinations of +5° to -69°.
Several maps were constructed to investigate the structure of the supercluster in 3-dimensions using the positional coordinates and a distance estimate (either from radial velocity or distance modulus).
The Southern Supercluster is smaller in mass compared to the Local Supercluster but is comparable to the Coma and Hercules Superclusters in terms of mass and luminosity.
www.cs.utexas.edu /users/mitra/ssabs.html   (473 words)

  
 The Local Supercluster   (Site not responding. Last check: 2007-11-02)
The Local Group is found on the outskirts of a larger structure dubbed the Local Supercluster which itself is flattened and is roughly centered on the Virgo Cluster.
This asymmetry occurs because the Local Group is located on the edge of the Local Supercluster.
Within the Local Supercluster, galaxies tend to be found in groups and clouds, with other regions being relatively empty.
astrosun.tn.cornell.edu /academics/courses/astro201/lsc.htm   (266 words)

  
 supercluster concept from the Astronomy knowledge base
Local Supercluster (8 facts) (Virgo supercluster) - The supercluster to which the Local Group belongs.
It is shaped like a cigar, with the Virgo cluster of galaxies at its center and the Local Group near one end., A loosely knit assemblage of some 100 clusters of galaxies, including the Local Group., The supercluster of galaxies to which the Local Group may belong (see Virgo Supercluster).
The galaxies in this supercluster appear to be distributed in a long chain.
www.site.uottawa.ca:4321 /astronomy/supercluster.html   (206 words)

  
 Superclusters of Galaxies Physics_2 from Connections Through Time
The Local Group of galaxies is on the outskirts of a "Local Supercluster" that is roughly centered on the Virgo Cluster of galaxies.
Superclusters are also dynamic structures which are interacting with each other and other mysterious elements in the universe.
Our Local Supercluster, along with a second supercluster, is moving at over 1 million miles per hour (600 km/sec) toward a structure called the Great Attractor, a region of space roughly 150 million light-years (one light year is about six trillion miles) away from us.
www.p-i-a.com /Magazine/Issue2/Physics_2_Superclusters.htm   (560 words)

  
 Local Supercluster concept from the Astronomy knowledge base
Local Supercluster concept from the Astronomy knowledge base
It is shaped like a cigar, with the Virgo cluster of galaxies at its center and the Local Group near one end.
has definition The supercluster of galaxies to which the Local Group may belong (see Virgo Supercluster).
www.site.uottawa.ca:4321 /astronomy/LocalSupercluster.html   (130 words)

  
 History of the universe!   (Site not responding. Last check: 2007-11-02)
Superclusters sometimes appear to be interconnected by thin walls or sheets of galaxies.
The curved superclusters (and even most of the central supercluster towards which the observer is falling) appear to recede, and the apparent recession is accelerating.
Diagram of Collapse describes a universe which is far from being homogeneous, having a centre (with a great concentration of mass) surrounded by a single approximately spherical supercluster, which in turn is surrounded by a void.
www.btinternet.com /~mtgradwell/anim1.html   (774 words)

  
 Large Scale Structure   (Site not responding. Last check: 2007-11-02)
In the mid 1980s, observers concluded that the Local Group of nearby galaxies reside near the edge of the Local Supercluster, a lumpy sheet of galaxies some 100 million years across that has as neighbors the Hydra-Centaurus Supercluster.
In 1987 the dimensions of lumpiness continued to grow: it was discovered that the Local Supercluster and its neighbors all belong to a much larger "complex" of superclusters.
The Pisces-Cetus Supercluster Complex is the horizontal structure: three other supersluster complexes-Aquarius, hercules-Corona Borealis and Leo—appear respective at the upper left, upper right and lower left.
public.lanl.gov /alp/plasma/LargeScale.html   (187 words)

  
 Superclusters of Galaxies   (Site not responding. Last check: 2007-11-02)
Other nearby superclusters include Perseus-Pisces at a distance of about 70 Mpc and Hydra-Centaurus, which is approximately 45 Mpc distant (with the constellations in the names giving the approximate location on the celestial sphere; thus, Perseus-Pisces lies partially in the constellation Perseus and partially in Pisces, as viewed from the Earth).
This difference, which is termed the Virgocentric peculiar velocity of the Local Group, presumably is due to the higher than average gravitational attraction felt between the Local Group and the rest of the Local Supercluster.
The corresponding mass to light ratio for the Local Supercluster is about 570, expressed in units of the ratio of the solar mass to the solar luminosity, indicating the presence of large amounts of
csep10.phys.utk.edu /astr162/lect/gclusters/superclusters.html   (365 words)

  
 Pisces-Perseus Supercluster   (Site not responding. Last check: 2007-11-02)
The Pisces-Perseus supercluster is one of the most prominent structures in the local extragalactic sky.
It lies at a mean redshift of about 5500 km/s and is is best described as a linear "filament" with an axial ratio of at least 8:1, inclined by less than 12 degrees to the plane of the sky.
The relative isolation of the supercluster from the Local Supercluster in the foreground and from other structures at larger distances is emphasized in the cone diagram.
astrosun2.astro.cornell.edu /academics/courses/astro201/pps.htm   (435 words)

  
 Cosmic Distance Scales -The Local Supercluster
It is the proximity of some 50 nearby small groups of galaxies to the Virgo cluster that suggests that they all form an enormous flattened cluster of clusters; we call it the Local Supercluster.
The Local Supercluster is actually centered on the Virgo Cluster of galaxies, which is why the Local Supercluster is sometimes called the Virgo or Coma-Virgo Supercluster.
The Local Group, which is near one edge of the Local Supercluster, appears to be revolving around its center at about 400 km/s.
heasarc.gsfc.nasa.gov /docs/cosmic/local_supercluster_info.html   (695 words)

  
 The Mass of the Local Supercluster   (Site not responding. Last check: 2007-11-02)
The Local Group of galaxies sits at the edge of what is known as the Local Supercluster (see Figure 3) which is dominated by the Virgo cluster.
The Local Group is being gravitationally pulled toward the Virgo cluster, this is called the Virgocentric infall.
Calculate the mass of the Local Supercluster (in solar masses) assuming that our motion relative to the cluster is not strongly disturbed by the tidal fields of more distant mass concentrations.
cse.ssl.berkeley.edu /bmendez/ay7a/html/homework/hw7/node2.html   (364 words)

  
 Extragalactic Astronomy / Cosmology
Some have suggested that Gerard de Vaucouleurs was the person who first uncovered the void and supercluster phenomenon because of his early (and seminal) studies of the Local supercluster.
We were granted the telescope time to measure galaxy redshifts, and in the era when Chincarini and Rood were publishing their Mayall plots, we had the clearly stated aim of mapping the 3D galaxy distribution in a swath of sky that stretched 21 degrees to the west of Coma.
Tifft, W.G. "The Correlation of Redshift with Magnitude and Morphology in the Coma Cluster", vol.
www.astro.uiuc.edu /~thompson/extrag.html   (3629 words)

  
 Roaming the Deep Sky #11
The bulk of the Virgo (for short) Supercluster lies between +70 and +80 degrees galactic longitude – quite near to the north galactic pole.
Fittingly, we are treated to a similar view when we train our telescopes on a group of galaxies near the center of the Virgo Cluster (and thus the Local Supercluster also) known as Markarian’s Chain (in the upper right corner of this DSS image).
M87, while not a member of Markarian’s Chain, is the brightest, as well as the gravitationally dominant, member of the Virgo Cluster – which lies at the core of the Local Supercluster.
home.insightbb.com /~lasweb/lessons/RDS11-MarkariansChain.htm   (1260 words)

  
 Local Supercluster
The supercluster to which our own Local Group of galaxies belongs.
By supercluster standards it is of very modest size with only one rich cluster of galaxies, the Virgo Cluster, at its center; the Local Group, which belongs to the Canes Venatici cloud of galaxies, lies in the outskirts.
The Local Supercluster appears to be made of two major structures: a flattened disk, which has a thickness of about 5 million light-years and contains about 60% of the bright galaxies, and a roughly spherical halo, which contains the remaining 40% of the bright galaxies in a small number of clouds.
www.daviddarling.info /encyclopedia/L/Local_Supercluster.html   (170 words)

  
 Virgo Supercluster - Wikipedia, the free encyclopedia
The Virgo Supercluster or Local Supercluster is the galactic supercluster that contains the Local Group and with it, the Milky Way galaxy.
The diameter of the Supercluster is about 200 million light years; it contains about 100 groups and clusters of galaxies and is dominated by the Virgo cluster near its center.
The entire Virgo Supercluster is being pulled toward a gravitational anomaly known as the Great Attractor, which lies near the Norma cluster.
en.wikipedia.org /wiki/Local_supercluster   (329 words)

  
 Sample text for Library of Congress control number 2001040232
Superclusters string the cosmos like glowing cobwebs, with vast voids of mostly empty space between.
Far beyond the superclusters and voids, like the backdrop to a mighty play, shines the afterglow of the universe's creation, the redshifted remains of light that tore free of matter 300,000 years after the universe's birth.
In only about 150 billion years, all galaxies beyond the Local Supercluster will vanish from the sky, because the space between them and us will be expanding so fast that their light can no longer reach the Earth.
www.loc.gov /catdir/samples/simon051/2001040232.html   (2052 words)

  
 Large Scale Structure
The study of the local Universe, including its peculiar motions and its clustering on scales exceeding 100 Mpc, is an essential ingredient in the connection between the origin of structure in the early Universe and the subsequent formation of galaxies and their evolution to the state we observe today.
Maller et al 2003a), and the dipole of the local Universe (cf.
The Local Supercluster as defined by de Vaucouleurs et al (1976) extends along the equator crossing through the Virgo galaxy cluster (bright blue cluster, left-center of image).
spider.ipac.caltech.edu /staff/jarrett/papers/LSS   (4053 words)

  
 Research (Günter Sigl)
Both source and observer sit at the center of a sheet with a Gaussian density profile of width 10 Mpc that approximates the Local Supercluster.
For example, if the deflection angle at a given energy is much smaller than the ratio of the coherence scale of the field and the distance to the source, l_c/D, all cosmic rays of that energy will follow the same paths and there will be only one image.
The origin of magnetic fields in the Local Supercluster and the observable predictions of more realistic implementations of this model are still in need of further study.
astro.uchicago.edu /home/web/sigl/r2e.html   (1208 words)

  
 The Local Group
It is of interest that of the subgroups of the Local Group mentioned above, the NGC 3109 group tends to the general direction of the Maffei 1 group and the M81 group, while the Local Group Cloud tends to the general direction of the Sculptor Group.
Therefore, it must be expected that more Local Group members exist, obscurred by dust, or extremely faint, and are still waiting for their detection somewhen in the future.
Local Group Survey, by Phil Massey Based on High Resolution Images from the KPNO and CTIO 4-m telescopes.
www.seds.org /messier/more/local.html   (1682 words)

  
 Directions to Earth
There is always some upset in the middle east, the average person in the USA always wants to make "a little bit more", and constant competition in Pete Kelly's neighborhood for who has the noisiest car.
Once you're in the Local Virgo Supercluster, about 100 million lightyears in diameter, the Local Group should start to become fairly clear straight ahead.
Here is a shot from our port longue showing the close stars and the Local Group in the background as you descend into the galactic plane.
members.cox.net /pfkhere/toearth/toearth.htm   (663 words)

  
 Understanding the Universe - Galaxy Tour - The Virgo Cluster - Discovery Channel School
Our own cluster of galaxies, the Local Group, is part of a larger collection of over one hundred clusters called the Local Supercluster.
At the center of this supercluster is the Virgo cluster.
The Virgo cluster is also the largest cluster of the supercluster, with over two thousand galaxies of different sizes and shapes.
school.discovery.com /schooladventures/universe/galaxytour/virgo.html   (182 words)

  
 DIGIDAY: Star Date   (Site not responding. Last check: 2007-11-02)
The Local Group and other nearby groups reside at one end of a long string of galaxies called the Local Supercluster, which stretches across a hundred million light-years of space.
The heart of the Local Supercluster is a cluster containing more than a thousand galaxies in the constellation Virgo.
Beyond the Local Supercluster are other superclusters, often named for the constellations in which they appear.
www.visionx.com /dd/main/star19980827.htm   (293 words)

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