... Editor's choices for the most educational Astronomy Pictures of the Day about clusters of galaxies: . APOD: 2006 March 21 - The Coma Cluster of Galaxies . ... APOD: 2005 November 22 - A Galactic Collision in Cluster Abell 1185 . ... A prominent example occurs on the left of the above image of the rich cluster of galaxies Abell 1185. ... Recent observations of Abell 1185 have found unusual globular clusters of stars that appear to belong only to the galaxy cluster and not to any individual galaxy. ...

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• APOD: 2002 March 28 - Centaurus Galaxy Cluster in X-Rays
• APOD: 2001 April 16 - The Hydra Cluster of Galaxies
• APOD: 2002 February 3 - The Coma Cluster of Galaxies

... Close," however, is only relative to other clusters of galaxies , since light takes about 50 million years to reach us from A2199. All of the fuzzy objects in the above picture are galaxies , but these galaxies do not contain most of the matter in the cluster. By studying clusters like A2199, astronomers conclude that some form of dark matter dominates the motion of the bright galaxies. ... Publications with keywords: galaxy cluster . Publications with words: galaxy cluster . ...

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• Астронет > Galaxy Cluster A2199
• The Fornax Cluster of Galaxies
• The Virgo Cluster of Galaxies

... December 13, 1997 . The Coma Cluster of Galaxies . ... The Coma Cluster of Galaxies pictured is one of the densest clusters known - it contains thousands of galaxies . Each of these galaxies house billions of stars - just as our own Milky Way Galaxy does. ... In fact, the Coma Cluster is so big it takes light millions of years just to go from one side to the other! Most galaxies in Coma and other clusters are ellipticals , while most galaxies outside of clusters are spirals . ...

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• APOD: March 15, 1998 - Unusual M82: The Cigar Galaxy
• APOD: May 3, 1997 - Giant Cluster Bends, Breaks Galaxy Images
• APOD: 2001 March 11 - NGC 1818: A Young Globular Cluster

... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

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M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

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• The Galaxy Gallery Page IX: Clusters of Galaxies
• Astronomy Plus CCD Images of Galaxies
• Evidence for Dark Matter

... Kalirai and Harvey Richer of the University of British Columbia led the study, which began as an investigation of a globular star cluster in the Milky Way galaxy known as NGC 6397. ... Within the population of stars and galaxies behind NGC 6397, the Hubble image revealed a large elliptical galaxy that contains several hundred globular clusters. ... In fact, a single giant star in NGC 6397 appears 10 million times brighter than one of the distant globular clusters. ...

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• The M87 Globular Cluster System Revisited
• Black Holes in Globular Clusters
• Local astronomers find gigantic halo around neighboring galaxy - By MEGHA

... We have made observations of the Perseus cluster with the Westerbork Telescope at 610 MHz. ... Several newly detected sources are identified with cluster galaxies. ... No evidence is found for the existence of the previously reported ~ 65'x25' cluster halo, 3C 84B. Key words: radio galaxies - clusters - tailed radio sources buoyancy The Perseus Cluster of galaxies is one of the most fascinating systems accessible to extragalactic astronomers. ...

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• A 1400-MHz Survey of 1478 Abell Clusters of Galaxies
• Radio data
• Nearby Galaxies Catalogue (NBG)

home publications > mercury . ... Big Clusters, Tiny Galaxies . ... Astronomers struggle to understand why giant star clusters form in the tiniest of galaxies . ... These clusters are probably young versions of globular clusters, but they are commonly called super star clusters. Seven dwarf galaxies within 16 million light-years have formed super star clusters, with one of these galaxies, NGC 1569, possessing two young clusters. ... Super star clusters have a lot to tell us about star formation. ...

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• ASP: Globular Clusters and Satellite Galaxies: Companions to the Milky Way
• ASP: Beacons in the Gloom
• ASP: Star Science in the Autumn Sky

... Next: Unsupervised Catalog Classification Up: Object Detection and Previous: Classification of Objects . ... Multi-resolution allows for image analysis in terms of different scales. ... This approach is used for the detection (and subsequent analysis) of globular cluster systems around elliptical galaxies, and for image characterization and object trawling in large image databases. ... The applicability of this approach to object detection in large image collections has been investigated. ...

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• Classification of Objects in the Guide Star Catalog
• Clustering Analysis Algorithms and Their Applications to Digital POSS-II
• Mapping the Jagiellonian Field of Galaxies

... An artificial comet holds secrets to Earths life . ... Astronomers recently discovered that Scholz's star passed close to the Sun 70,000 years ago. Wouldn't its gravity have sent Oort Cloud comets raining into the inner planets? ... COMETS | OORT CLOUD . Based on the number of long-period comets that enter the inner solar system, astronomers estimate there are probably trillions of them in the Oort Cloud. Get instant access to subscriber content on Astronomy.com! ... Discover | ...

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• Cosmic Origins App | Astronomy.com
• Web Extra: Astronomers animate one of the largest galaxy clusters ever observed
• Two open clusters in Canis Major, emission nebula NGC 2316, and spiral galaxy

A Canadian and American team of Astronomers have used the 305-m wide Arecibo radio dish, the world's largest and most sensitive radio telescope, to uncover a dozen new super-fast-spinning pulsars. The team directed their search for these rare and exotic stars by pointing the Arecibo radio telescope towards massive star clusters, called Globular Clusters, orbiting our Milky Way galaxy. ... One of the most exotic residents in the Globular cluster system are the millisecond pulsars. ...

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• AGES - the Arecibo Galaxy Environment Survey
• New Results Confirm Dark Galaxy Existence
• Astronomy at AO

... Millions and billions of stars were bound by gravity into groups that we call galaxies. And gravity even confines galaxies together in packs that we call galaxy clusters . ... It shows the Spiderweb Galaxy forming at the centre of a galaxy cluster. ... Like a construction site on Earth, galaxy clusters are dusty while they are forming. ... Using one of these special telescopes astronomers have managed to look at stars being born inside the Spiderweb galaxy cluster for the first time. ...

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• ESO - Studying the Cosmological Evolution of Galaxy Clusters with (Sub-)mm
• Marina Rejkuba's Web Site
• ESO - Dynamics of Low-Mass Stellar Systems: From Star Clusters to Dwarf...

... Bad Astronomy . ... Bitesize Astronomy . ... The last step encompassed them all with galaxies , and how we discovered that the Milky Way was not the entire Universe. ... And just like those star clusters, there are different kinds of galaxy clusters. ... There are vast clusters of clusters, called superclusters, which contains hundreds of thousands or even millions of galaxies. ... Our own Galaxy has 400 billion stars in it, yet there are clusters out there with millions of galaxies like our own. ...

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• Phil Plait's Bad Astronomy: Info

Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Starbursts are short-lived events, stars are forming so quickly that the reservoirs of interstellar gas from which stars are coalescing would be used up on a timescale much shorter than the age of the galaxy . ... Strong stellar winds from giant new stars in the starburst region combine with the blasts of supernovae to push a mighty flood of extremely hot gas, a ?superwind? from the galaxy thousands of light years into intergalactic space. ...

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• Kepler 36b and c: Too Close for Comfort | Astronotes
• Exoplanet HAT-P-1b: weird, warm and fuzzy | Astronotes
• M55 globular cluster seen by ESO | Astronotes

... We present a photometric and spectroscopic study of the unique isolated nearby galaxy KKR25. The isolated dwarf spheroidal (dSph) galaxy KKR25 was discovered by Karachentseva, Karachentsev Richter (1999, A , 135, 221) during the search of dwarf galaxies in the direction of the Local Void. In spite of its isolation KKR 25 has no gas and looks like a normal dwarf spheroidal system. ... This is the first known planetary nebula in a dwarf spheroidal galaxy outside the Local Group. ...

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• Discovery of an isolated dwarf spheroidal galaxy neighboring the Local Group
• New LBV Discovered in DDO 68 Galaxy
• important_en

... The remote area was formed very early, at a time when the Universe was a fifth of its present age and the presence of the galaxy string defies existing models, which can not explain how a string this big could have formed so long ago. ... The simulations tell us that you cannot take the matter in the early Universe and line it up in strings this large," Dr Francis said. ... But in the early Universe, most galaxies had not yet formed, and most dark matter clouds will not yet contain a galaxy. ...

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• THE AUSTRALIAN NATIONAL UNIVERSITY
• Julie Banfield | Astronomer
• VV29 = Arp 188 = The Chainsaw Galaxy

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . Portrait of Sir William Herschel (1738-1822) Royal Astronomical Society . Probably the most famous astronomer of the 18th century, Sir William Herschel discovered, in addition to the planet Uranus, many new nebulae, clusters of stars and binary stars. ... Other Herschel Family Portraits . Mirror by Herschel . Return to A Short History of Armagh Observatory . Last Revised: 2009 November 23rd . ...

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• Spread of Life through the Galaxy
• Stars Beyond Maturity
• Armagh Observatory

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Australia Telescope Online Archive (ATOA) . ... Australia Telescope 20GHz Survey . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... Major mergers provide an important channel for morphology transformation. ...

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• Compact Stellar Systems in the Fornax Cluster: Super-massive Star Clusters or
• On the Gas Surrounding High Redshift Galaxy Clusters1
• ATNF Colloquium

... Archives . ... my first AAS. ... I was questioned by two attendees, acquainted before the AAS, if I can suggest them clustering methods relevant to their projects. ... classification vs. clustering or supervised learning vs. unsupervised learning : the former terms from the pairs indicate the fact that the scientist already knows types of objects in his hands. ... Tags: Classification , clustering , cosmology , spatial statistics , supervised learning , test , unsupervised learning . ...

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• Southern SHARC survey
• The galaxy M100
• The AstroStat Slog GRB

... Astrophysics Group . ... AMI Science . ... Observations of galaxy clusters are central to the AMI science programme. The AMI Small Array is used to observe already-known clusters with high-sensitivity and resolution, allowing us to extract detailed information about individual clusters and to build up statistics about the cluster population. ... Observing galaxy clusters at 15 GHz is tricky because of the contamination from foreground radio sources, which is where the Large Array comes in! ...

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• Astrophysics Group AMI-Planck
• Astrophysics Group AMI Publications
• A gallery of interacting galaxies