... Structure of Data . ... Catalog . ... In SAI OCL Catalog, we introduce our work on investigation of the Milky Way system of open star clusters. The main goal of our study is a search for new clusters using huge surveys. 168 new clusters have been already discovered by us using J,H,Ks data from 2MASS point source catalog. ... For 141 new clusters, we found their physical parameters using J,H,Ks data from 2MASS catalog and, for a number of clusters, our UBVRI CCD observational magnitudes. ...

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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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... 2002 July 4 . Young Star Clusters in an Old Galaxy . ... Explanation: Elliptical galaxy NGC 4365 is old, probably about 12 billion years old. ... Moving the cursor over the image identifies individual star clusters, with the relatively young (few billion year-old) clusters circled in blue, and the anticipated 12 billion year-old clusters circled in red. NGC 4365 is 60 million light-years away in the Virgo galaxy cluster . ... About APOD | ...

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• APOD: 2012 April 3 - M46 and M47: Star Clusters Young and Old
• APOD: 2006 September 10 - Star Clusters Young and Old
• APOD: 2014 September 4 - Cloud, Clusters and Comet Siding Spring

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• Visible/infrared cross-fade of the newly discovered globular star cluster VVV
• VISTA view of the newly discovered globular cluster VVV CL001 and its brighter
• VISTA view of the newly discovered globular cluster VVV CL002 close to the

... 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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• Black Holes in Globular Clusters
• HST this week: 220
• Combined IRAC2 vs HST Color-Magnitude Diagrams of Bulge Globular Clusters.

... Young Star Clusters in an Old Galaxy . ... ESO , ESA , NASA Explanation: Elliptical galaxy NGC 4365 is old, probably about 12 billion years old. ... NGC 4365's star clusters themselves appear as bright dots against a diffuse glow of unresoved starlight and fuzzy, distant background galaxies. ... Publications with keywords: NGC 4365 - Elliptical Galaxy - star cluster - star formation . Publications with words: NGC 4365 - Elliptical Galaxy - star cluster - star formation . ... X Ray Stars of Orion . ...

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• XWare > APOD

Stellar Clusters are very useful laboratories for empirically studying stellar evolution. ... All cluster stars are at the same distance . All cluster stars have the same physical age . ... CM diagram Young Cluster In this case we see the Main Sequence fully represented. The blue dots represent massive stars with short main sequence lifetimes. ... Thus, identifying the most massive star which is still on the main sequence is an effective means of determining the age of a stellar cluster. ...

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• Astro-2 and the UIT Experiment
• The Galaxy Gallery Page IX: Clusters of Galaxies

... 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 VLA Survey of Rich Clusters of Galaxies II
• A VLA Survey of Rich Clusters of Galaxies I.
• A VLA Survey of Rich Clusters of Galaxies III

... 2000 January 12 . NGC 6791: An Old, Large Open Cluster . ... Explanation: NGC 6791 is one of the oldest and largest open clusters of stars known. ... Open star cluster NGC 6791 , however, contains thousands of stars recently measured to be about 8 billion years old. ... This enigma makes NGC 6791, pictured above , one of the most studied open clusters and a possible example of how stars might evolve in the centers of galaxies. ... About APOD | ...

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• Arcetri Star-Formation Group Publications
• APOD: December 13, 1997 - The Coma Cluster of Galaxies
• APOD: 2001 March 11 - NGC 1818: A Young Globular Cluster

Astronotes Armagh Planetarium's Stellar Blog! ... Comets and Asteroids . ... Image credit:ESO/J.Emerson/VISTA. ... However others are less pessimistic and it has even been claimed that the mysterious ?Wow! signal? received in 1977 originated from the direction M55.б  Sadly, this still unexplained pulse of radio energy originated from a location rather to the northwest of M55 so I doubt if the source was this cluster (if indeed the signal was genuinely of extraterrestrial origin). ... Mysterious Wow! ...

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• Omega Centauri: globular cluster of 300,000 stars | Astronotes

Supernova 2009js in NGC 918 . This page is devoted to information on Supernova 2009js in NGC 918 . Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the updates and links web pages. Discovered independently by Lick Observatory Supernova Search (USA) and Koichi Itagaki (Japan). ... 2009/10/11.44 . 17.2 . ... Joseph Brimacombe . ...

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... 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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• Asteroid Discovery 1890 - 2010
• Stars Beyond Maturity
• Discover | OASES Over us All is the SElfsame Sky | OASES 2010

... Galaxy clusters in presence of dark energy: a kinetic approach . ... The external regions of galaxy clusters may be under strong influence of the dark energy, which was discovered by observations of supernovae Ia at redshift z < 1. The presence of the dark energy in the gravitational equilibrium equation, with the Einstein ? ... diagram where equilibrium solutions are not possible. ... Galacti