... The Quintuplet Star Cluster . ... Bright clusters of stars form and disperse near the center of our Galaxy. ... The Quintuplet Cluster is located within 100 light-years of the Galactic center, and is home to the brightest star yet cataloged in our Galaxy: the Pistol Star. ... Visible to the unaided eye as a fuzzy patch in the constellation of Orion, this image taken with the Big Throughput Camera shows the Orion Nebula to be a busy neighborhood of young stars, hot gas, and dark dust. ...

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... 2004 February 22 . The M7 Open Star Cluster in Scorpius . ... Explanation: M7 is one of the most prominent open clusters of stars on the sky. The cluster, dominated by bright blue stars , can be seen with the naked eye in a dark sky in the tail of the constellation of Scorpius . ... The M7 star cluster has been known since ancient times, being noted by Ptolemy in the year 130 AD. ... About APOD | ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...

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• APOD: 2014 February 22 - M44: The Beehive Cluster
• APOD: 2001 February 22 - 3C294: Distant X Ray Galaxy Cluster
• APOD Index - Stars: Open Clusters

This site provides on-line access to publications, figures, and data tables related to an extensive multi-wavelength observational program to study distant galaxy clusters. ... Lori Lubin, Bev Oke, and Marc Postman have been studying a sample of 9 distant clusters (some taken from the PDCS) using the Keck 10m telescope, the HST, and the KPNO 4m (for IR imaging). ... A Study of Nine High-Redshift Clusters of Galaxies: I. The Survey, . ... A Study of Nine High-Redshift Clusters of Galaxies: II. ...

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• A Deep Wide Area I-Band Survey
• Project D - Constructing HR Diagrams for Star Clusters out to Virgo
• Selected telescopes I have observed with

Aitoff Projection showing ChaMP Fields . ... Main survey: >20 from galactic plane. ... Galactic Plane Survey: No subarray fields: reduced area and more complicated processing . ... Short exposures included except NGC galaxies . Galactic Plane Survey: > 30 ksecs . ... Galactic Plane Survey: >10% contamination by a diffuse/distributed X-ray or optical source. ... E(B-V)= (B-V) - (B-V) 0 which translates to visual extinction A V via . ... Crudely, E(B-V) can be related to Galactic latitude via . ...

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• The AstroStat Slog Blog Archive my first AAS. IV. clustering
• The Chandra Multiwavelength Project (ChaMP) - Science Goals
• The AstroStat Slog Globular Clusters

... BLUE STRAGGLER STARS are unusually hot and bright stars found in the cores of ancient star clusters known as globulars. ... BACKGROUND (from wikipedia): Blue straggler stars are stars in open or globular clusters that are hotter and bluer than other cluster stars having the same luminosity. ... There is evidence in favor of this view, notably that blue straggler stars appear to be much more common in dense regions of clusters, especially in the cores of globular clusters. ...

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• GSAOI Open Cluster Science Page
• Julie Banfield | Astronomer
• GSAOI Globular Cluster Science Page

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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• The Galaxy Gallery: Messier Objects
• Astronomy Plus CCD Images of Galaxies
• Astronomy HyperText Book

... The study of the Large-scale structure of the Universe and measurements of the Dark Energy equation of state; The exploration of the growth and cosmological evolution of supermassive Black holes in the Universe. ... In course of the all sky survey SRG will discover about 100 000 galaxy clusters and 3 million AGNs. Galaxy clusters are the largest gravitationally bounded objects in the Universe and are best explored through the study of X-ray emission from the hot intergalactic gas. ... 2016 IKI RAN ...

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• High Energy Astrophysics Department at IKI RAN

... LMC Project Outline . NGC 1818 Initial Results . ... The Large Magellanic Cloud (LMC) is uniquely suitable for the study of massive star clusters at all stages of evolution. By combining HST observations of these clusters with N-body models we hope to understand the origin and evolution of rich star clusters in our own Galaxy, in the LMC, and beyond. ... We aim to combine our HST observations with N-body models to understand the formation and evolution of globular clusters. ...

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... ESO is building what will be the World's largest optical telescope array, The Very Large Telescope (VLT). The VLT Project organisation is responsible for the design and construction of the Unit Telescopes, including enclosures, optics, adapter-rotators and coating unit. ... Unit Telescopes Overview - This page is outdated, an update is in process. ... Secondary mirror (M2 Unit) - This page is outdated, an update is in process. ... Coating Unit - This page is outdated, an update is in process. ...

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• ESO - Thesis Topic: Studying the first galaxy clusters with ALMA
• The hidden fires of the Flame Nebula* | ESO
• Panning across the bright star cluster Messier 7 | ESO

. F IGURE . 2. The distribution of globular clusters projected onto the XY [(a) and (c)] and YZ [(b) and (d)] planes for metal-rich clusters of the thick disk with [Fe/H] -1.0 [(a) and (b)] and metal-poor clusters of the halo [(c) and (d)]. The closed curves are upper envelopes drawn by eye. Clusters lying far from the central concentrations in the diagrams are outlined and their numbers indicated. discussion in the text | previous figure | next figure .

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• Population of Galactic globular clusters, tabl
• Vladimir Marsakov Abstracts

... Staff . ... Galaxies, AGN, Cosmology . ... A new survey of X-ray clusters of galaxies with the Swift-X-ray Telescope . ... In this framework, an international collaboration between INAF-OAA, INAF-Brera, INAF-OATs, the University for Science and Technology of China-Hefei, the University of Ferrara, and the University of Massachusetts-Amherst, is undertaking a new cluster survey using an X-ray facility that was never exploited before for this goal: the X-ray Telescope (XRT) onboard the Swift satellite...

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• APOD: February 21, 1996 - Millions of Stars in Omega Centauri
• SWXCS
• Deep X-ray and IR study of the distant X-ray cluster XDCP J0044.0-2033 (Il

Проект существует с июля 2002 года. Цель проекта - дать краткий обзор наиболее интересных статей, появившихся в библиотеке электронных препринтов astro-ph . Также в обзоры будут включаться статьи, появившиеся в списке astro-ph из других разделов. ... Параллельно в 2002-2003 гг. создавался списки обзорных статей, в которых подробно освещаются те или иные часто обсуждаемые вопросы (например, статья А. Линде hep-th/0107176 является одной из лучших обзорных статей по инфляции). ...

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... 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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• SAI OCL Catalog Description
• SAI OCL Catalog King 13
• SAI OCL Catalog Berkeley 97

ABSOLUTE PROPER MOTIONS OF 331 OPEN CLUSTERS . ... The proper motions of stars in the fields of 331 open clusters were taken from Four-Million Star Catalog (4M-catalog) of positions and proper motions (Volchkov et al. ... The absolute proper motions for 21 young open clusters have been derived by comparison of precise relative proper motions of individual stars and their corresponding absolute proper motions. ... Sign of proper motions in RA . ... 0.0001 arcsec/yr . ... rms error in RA proper motion . ...

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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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• NGC4666: Secrets of a Starburst Galaxy | Astronotes
• Wonders of the February Night Sky | Astronotes
• Hubble shows us a spectacular star cluster | Astronotes

... The Pleiades star cluster, also known as the Seven Sisters and Messier 45, is a conspicuous object in the night sky with a prominent place in ancient mythology . ... The stars in the Pleiades are thought to have formed together around 100 million years ago, making them 1/50th the age of our sun, and they lie some 130 parsecs (425 light years ) away. ... Data for these stars are listed in a table below. ... Yes . ... WEBDA Pleiades cluster data . ... M45: The Pleiades Star Cluster (2007 November 18) ...

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• H I Midplane Poster for the 201st Meeting of the AAS, January, 2003
• Robert Minchin
• Gas and Dust in the Pleiades Reflection Nebula

This animation shows a galaxy cluster with two mass concentrations (the pink shading indicates the projected mass density) lensing a background field of faint blue galaxies. ... Inside the Einstein ring radius one has radial arcs, and right in the center of the cluster there are demagnified images. The highest magnifications occur at the Einstein ring radius, giving the large tangential arcs. ... Abell 2218 and CL2244-02 are clusters with tangential arcs. ... Tutorial : Part 1 | Part 2 | ...

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• A 1400-MHz Survey of 1478 Abell Clusters of Galaxies
• Cluster radio source identifications
• CATS home page

... Project page . ... Project workpage . Turbulence in the Multiphase Interstellar Medium . Project I | ... Project highlight | ... Towards simulating turbulence with adaptive meshes . ... A. Kritsuk, P. Padoan, M. Norman . ... A. Kritsuk M. Norman . ... A. Kritsuk, M. Norman, P. Padoan . astro-ph/0411626 | ... P. Padoan, A. Kritsuk, M. Norman, A. Nordlund . ... Introducing Enzo, an AMR Cosmology Application . B. O'Shea, G. Bryan, J. Bordner, M. Norman, T. Abel, R. Harkness, A. Kritsuk . ...

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• INTAS project 99/652

... List . Starry, Starry Night . ... Starry, starry night . Paint your palette blue and grey, . ... With eyes that know the darkness in my soul. ... Now I understand what you tried to say to me, . ... How you tried to set them free. They would not listen, they did not know how. Perhaps they'll listen now. ... Reflect in Vincent's eyes of China blue. ... N ow I understand what you tried to say to me, . ... Perhaps they'll listen now. listen to the song . б© 2010 OASES . ...

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• Armagh Observatory
• OASES workshop at the Armagh Library | OASES Over us All is the SElfsame Sky |
• Album | OASES Over us All is the SElfsame Sky | OASES 2010

MOS monitoring Fading Cal sources MOS CTI Column Correction Mallorca EPIC Cal Meeting - February 2005 Darren Baskill: http://www.star.le.ac.uk/~dbl XMM project: http://www.src.le.ac.uk/projects/xmm/ MOS CTI Column Correction Problem spotted in 1E0102.. Mallorca EPIC Cal Meeting - February 2005 Darren Baskill: http://www.star.le.ac.uk/~dbl XMM project: http://www.src.le.ac.uk/projects/xmm/ Problem spotted in 1E0102.. ...

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• XMM-Newton Trainee Project 2004
• XMM-Newton Trainee Project 2005