... These Frontier Fields will combine the power of HST with the natural gravitational telescopes of high-magnification clusters of galaxies. ... We are soliciting gravitational lensing maps for the last four Hubble Frontier Fields clusters (MACSJ0717.5+3745, MACSJ1149.5+2223, AbellS1063, and Abell 370) based upon the exceptionally deep HST FF imaging and other new ancillary data. ... For the full set of proposal instructions and requirements, see the FY16 Frontier Fields Lensing Map Call for Proposals....

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• M51 Release
• HST Observer Monthly
• Gregory F Snyder

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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• Hubble Ultra Deep Field
• Astro-2 and the UIT Experiment
• Low Surface Brightness Galaxy Gallery

... Credit Copyright: SSRO -South, J. Harvey, S. Mazlin, D. Verschatse, J. Joaquin Perez, (UNC/CTIO/ PROMPT ) Explanation: Large spiral galaxy NGC 4945 is seen edge-on near the center of this cosmic galaxy portrait . ... About 13 million light-years distant toward the expansive southern constellation Centaurus , NGC 4945 is only about six times farther away than Andromeda, the nearest large spiral galaxy to the Milky Way. ... Publications with words: edge-on - Centaurus - spiral galaxy - active galaxy ....

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• XWare > APOD
• Journal "Peremennye Zvezdy"
• Астронет > The Dawn of the Clusters

... 2000 January 4 . Galaxies Cluster Toward the Great Attractor . ... The galaxies pictured above are part of a cluster of galaxies called ACO 3627 near the center of the Great Attractor . ... The Great Attractor is a diffuse mass concentration fully 250 million light-years away, but so large it pulls our own Milky Way Galaxy and millions of others galaxies towards it. Many of the galaxies in ACO 3627 are slowly heading towards collisions with each other. ... About APOD > . ...

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• APOD: 2000 February 28 - The Sombrero Galaxy from VLT
• APOD: 2000 January 12 - NGC 6791: An Old, Large Open Cluster
• APOD: August 7, 1998 - M65 Without Moth

... Each day we feature a different image or photograph of our fascinating universe, along with a brief explanation written by a professional astronomer. July 10, 1995 . Abell 2218: A Galaxy Cluster Lens . Picture Credit: NASA, HST, WFPC2, W. Couch (UNSW) . ... Almost all of the bright objects in this image are galaxies in the cluster known as Abell 2218. ... We keep an archive of Astronomy Pictures of the Day. ...

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• APOD: 2008 September 17 - MACSJ0025: Two Giant Galaxy Clusters Collide
• APOD: 2009 April 26 - NGC 4676: When Mice Collide
• APOD: 2008 July 21 - The Colliding Spiral Galaxies of Arp 271

Astronotes Armagh Planetarium's Stellar Blog! ... Our Galaxy . ... Other Galaxies . ... Telescopes and Observatories . ... Everyone loves stunning pictures of spiral galaxies,€а I have said this before and will no doubt say it again. The folks at the European Southern Observatory (ESO) know this too, and their latest public image release is a bumper set of serenely spinning spirals. ... Tweets that mention Six glorious spiral galaxies seen by the European Southern Observatory. ...

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• Other Galaxies | Astronotes - Part 2
• Hubble images orphan star | Astronotes
• Universe | Astronotes - Part 4

. These images taken by NASA's Hubble Space Telescope show four members of the Virgo cluster of galaxies, the nearest large galaxy cluster to Earth. They are part of a survey of globular star clusters in 100 of Virgo's galaxies. The Hubble study found evidence that these globulars are more likely to form in dense areas, where star birth occurs at a rapid rate, instead of uniformly from galaxy to galaxy. NASA/ESA/E. Peng (Peking University, Beijing)

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• Web Extra: Astronomers animate one of the largest galaxy clusters ever observed
• Hubble observes galaxies' evolution in slow motion | Astronomy.com
• Two open clusters in Canis Major, emission nebula NGC 2316, and spiral galaxy

... Confirmation that a mysterious cloud of hydrogen in the Virgo Cluster is a dark galaxy has been published by a team of astronomers . New evidence from NASA's Hubble Space Telescope and the Westerbork Synthesis Radio Telescope in the Netherlands has been used to rule out all but one of the ideas put forward to explain the existence of VIRGOHI 21, an intergalactic gas cloud 50 million light-years from the Earth. ... Only Dark Matter can account for the existence of such a system. ...

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• Pulsar Highlights - A Dozen new MSPs in Globular Clusters
• VIRGOHI 21

... 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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... Research . ... A rare hybrid morphology radio galaxy . ... In this project we will be able to investigate the environmental effect on star formation and galaxy evolution in individual galaxies falling into the cluster through radio observations of active galactic nuclei (AGN). Current models of galaxy evolution regulate the star formation rates within the simulated galaxies by invoking radio-mode feedback from AGN. ... Julie.Banfield@anu.edu.au . ...

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• How far away is Virgo?
• Dougal Mackey - Research
• GSAOI Super Star Clusters Science Page

... 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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• http://www.eso.org/public/news/eso1526/kids/
• The Very Large Telescope Project
• Hubble view of the galaxy cluster Abell 3827 | ESO

... Courtesy of NASA/ESA Observation data (J2000 epoch) Constellation Right ascension Declination Redshift Distance Type Serpens Caput 15h 17m 14.4s[] +21° 35 08[] 12,740±50 km/s[][1] 600±30 Mly (183±8 Mpc)[1] SA0(r) [citation needed ] [a] Apparent dimensions (V) 0.28 в 0.28[] Apparent magnitude (V) 16.0[] Notable features Ring galaxy Other designations PGC 54559,[] PRC D-51[] See also: Galaxy, List of galaxies Hoag's Object is a non-typical galaxy of the type known as a ring galaxy. ...

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... 145Slee,Roy Savage We present detailed radio and optical parameters for the stronger radio sources in 58 Abell cluster fields observed with the Very Large Array (VLA) using scaled arrays at 1.5 and 4.9 GHz. ... The cluster fields were distributed over 24 h of RA and between declinations +35 deg and -30 deg. ... Optical identifications Cluster Source Radio Centroid Optical Position EF Ang. ...

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• A 20 cm VLA survey of Abell clusters of galaxies
• A VLA Survey of Rich Clusters of Galaxies III
• A VLA Survey of Rich Clusters of Galaxies I.

... Our Milky Way galaxy is host to a number of companions. These companions are gravitationally bound to the Milky Way and are stellar systems in their own right. They include a population of about 150 globular clusters (GCs) and some 30 dwarf satellite galaxies (DSGs). ... These DSGs are more extended and diffuse compared to GCs. In fact the larger satellites of the Milky Way (and other galaxies, for that matter) host their own small systems of GCs. ...

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• ASP: Taking a Grand Virtual Voyage in the Milky Way
• ASP: Astronomy Behind the Headlines
• ASP: Beacons in the Gloom

... 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
• PPEUC Programme - Cosmic Microwave Background Workshop
• Astrophysics Group AMI Publications

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) . ... ATCA | ... CSIRO Radio Astronomy Image Archive . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... The Australia Telescope National Facility Colloquium . ...

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• ATNF Media Release - December 1, 1998
• The Interacting Galaxy Pair NGC 6872 / IC 4970
• Nearby Galaxies

ATMoB "Galaxy Observing Award " Guidelines Purpose: To promote observing among the membership of the Amateur Telescope Makers of Boston through participation in the Galaxy Observing Awards program. ... Examples of elliptical galaxies: M49, M59, M60, M87, NGC 4125. Limiting Magnitude Assessment: Spirals: A spiral galaxy consists of a flattened disk, with stars forming a (usually two-armed) spiral structure, and a central concentration of stars known as the bulge. ...

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• Amateur Telescope Makers of Boston
• Amateur Telescope Makers of Boston ATMoB Observing Awards Program

... All previous such superstars have been found along with many companion stars in the centres of crowded star clusters. The star is known as VFTS 682 from the VLT-FLAMES Tarantula Survey catalogue of the European Southern Observatory's Very Large Telescope (VLT) located at Paranal in Chile by means of the attached FLAMES instrument. ... Although VFTS 682 seems to be alone now it is not very far away from a very rich star cluster known as RMC 136 that contains several similar superstars. ...

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• Evolution Of Galaxies
• Spread of Life Through the Galaxy
• Astronomy Today and the Role Played by the Hubble Space Telescope: Wednesday 17

DARK MATTER IN THE UNIVERSE Paul J. Green UNSEEN MASS: Astronomers studying the motions of stars and galaxies throughout the universe have long noticed a strange discrepancy. Stars move around galaxies as if pulled by ten times the matter that we can see. ... GRAVITATIONAL LENSING: Since dark matter by definition cannot be directly observed, several recent searches have instead exploited the predicted gravitational effects of its mass on the observed light from nearby stars. ...

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• PAUL J. GREEN - Contributing ConcepTests
• The galaxy M100
• The AstroStat Slog Blog Archive Classification and Clustering

Title: A Dark-Matter Spike at the Galactic Center? Authors: Piero Ullio , HongSheng Zhao , Marc Kamionkowski . ... Title: The Galaxy Environment of Quasars in the Clowes-Campusano Large Quasar Group at z~1.3 . ... Title: The Galaxy Environment of a Quasar at z=1.226: A Possible Cluster Merger . ... 16 matches for the search pattern galaxy environment . The URL for this page is: http://xxx.itep.ru/find/astro-ph/1/galaxy+environment/0/1/0/past,all/0/0 www-admin@xxx.lanl.gov ...

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• astro-ph authors/title/abstract search for 'galaxy cluster' (skipped 200) all
• Other WWW Sites