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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... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

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Target names are used to provide unique designations for the targets that will be used throughout the proposal. These names will generally also be used in Phase II, and ultimately to designate targets in the HST data archive. ... This facility will be most useful if consistent naming conventions are used. ... If a target is not contained in these catalogs, other catalog designations may be used (e.g., 4U X-ray catalog designation, Villanova white-dwarf catalog number, etc.) ... Target Type . ...

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• Simulation of a Distant Cluster of Normal Galaxies
• Target Category and Target Description [Description]
• HST this week: 259

... Abell 2142: Clash of the Galaxy Clusters . ... Credit: Maxim Markevitch ( CfA ), ACIS , SAO , CXC , Chandra , NASA Explanation: Over the course of billions of years, whole clusters of galaxies merge. Above is an X-ray image of Abell 2142 , the result of the collision of two huge clusters of galaxies, and one of the most massive objects known in the universe. ... Publications with keywords: cluster of galaxies - X-ray . Publications with words: cluster of galaxies - X-ray . ...

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• The Perseus Cluster of Galaxies
• JKCS041: The Farthest Galaxy Cluster Yet Measured
• Астронет > The Perseus Cluster of Galaxies

... 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: 2008 September 17 - MACSJ0025: Two Giant Galaxy Clusters Collide
• APOD: 2009 October 28 - JKCS041: The Farthest Galaxy Cluster Yet Measured
• APOD: 2011 July 12 - The Perseus Cluster of Galaxies

... 633Slee+ Fifty-eight fields near rich clusters of galaxies were surveyed with the Very Large Array using scaled arrays in the B/C and/or C/D configurations at 1.5 GHz and 4.9 GHz. The fields were centered on steep spectrum sources in or near clusters that were earlier surveyed with lower resolution telescopes. ... The columns are : . Column 1 Cluster Field (Z1518 = Zw1518.8+0747) . Column 2 distance of source from cluster centre in Abell radii . ... Column 5 1.5 GHz flux (mJy) . ...

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• A 20 cm VLA survey of Abell clusters of galaxies
• HyperLEDA documentation: compilation of association membership (a104)
• HyperLEDA documentation: HyperLEDA: catalogue of designations (a101)

... Tonight's Sky . ... The Magazine . ... Observing . ... 50 Weirdest Objects . ... Supernova showered Earth with radioactive debris . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Observing springtime deep-sky objects with a large telescope . ... near earth objects . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

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• The 109 objects in a March globular cluster marathon | Astronomy.com
• galaxy clusters | Astronomy.com
• What's the difference between globular clusters and dwarf spheroidal galaxies?

... 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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• The AstroStat Slog Blog Archive Classification and Clustering
• The AstroStat Slog GRB
• The AstroStat Slog clustering

... ESO, the European Southern Observatory . ... ESO's Governing Bodies . ... Travel to ESO Headquarters . ... Visits to ESO Sites . ... Survey Telescopes . ... Galaxy Clusters . ... Large JPG Zip File (4.6 GB) . ... Very Large Telescope . ... ESO 3.6-metre telescope . ... MPG/ESO 2.2-metre telescope . ... ESO 1-metre Schmidt telescope . ... This image is centered on the bright, rich and compact cluster (NGC 1916), located close to N119. ... Local Universe : Star : Grouping : Cluster : Globular . ...

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• Globular Cluster NGC1916 near N119 in the Large Magellanic Cloud | ESO Ireland
• Globular Cluster NGC1916 near N119 in the Large Magellanic Cloud | ESO...
• Globular Cluster NGC1916 near N119 in the Large Magellanic Cloud | ESO United

... Research . ... I aim to understand the variety of processes that have driven galaxy formation and mass assembly across cosmological history via the resolved (star-by-star) study of nearby systems - in particular the Milky Way and Andromeda (especially their stellar halos and globular cluster populations), the Magellanic Clouds, and the myriad of smaller dwarfs that inhabit the "Local Group".б  . ... Globular clusters are fascinating objects in their own right. ...

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• GSAOI Super Star Clusters Science Page
• Siding Spring Survey
• The High-Z SN Search Description

IFP gallery SCORPIO (since 2000). Here some data observed on the 6m telescope with IFP installed in the SCORPIO focal reducer are presented. ... Velocity field . Mkn 1157 was observed 1 Sep. 2002 in the Ha emission line. Texp =32x240 sec, seeing 1.5", IFP260. ... This galaxy was observed September, 23 2000 in the Ha emission line, Texp=32x120 sec, seeing 2.5", IFP260. ... PV Cep was observed at the 6m telescope in May, 25 2003 in the [SII] 6716A with IFP501, Texp=36x200 sec, seeing 1.0". ...

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• Search for distant radio galaxies in SAO
• Laboratory of spectroscopy and photometry of extragalactic objects : Vortex

... About ATMoB . ... The Observing Committee is starting an Observing Awards Program to promote observing among the membership of the Amateur Telescope Makers of Boston. ... Participant must be a current member of the Amateur Telescope Makers of Boston . ... To qualify for your Observing Award Certificate, turn in your worksheet and drawings to an ATMoB Observing Committee member or observing@atmob.org . ... This Excel sheet has useful macros. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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• Amateur Telescope Makers of Boston

... Next: Object Detection Using Up: Object Detection and Previous: Automated Classification of . ... A status report of the The GSC Object Classifier (GOC) project is presented. ... The GSC contains multiple entries for some objects due to plate overlap. It classifies objects as stars, non-stars, galaxies, blends and potential artifacts; the latter three classifications are rare, and only exist in GSC version 1.1, to which they were added manually. ... star, . ... non-star, . ...

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• Object Detection Using Multi-Resolution Analysis
• Spatial Structure of NGC 6822: An Example for Statistical Modeling of
• Clustering Analysis Algorithms and Their Applications to Digital POSS-II

General Forum Message . Forums: . ... Deep Space Object Galaxy Near M13 . ... Can anyone tell me if there is a DSO (likely a galaxy) near M13? ... The reason it interests me is that I drew a sketch of M13 years and years ago while observing - and that object is one of the handful of 'stars' that I drew. ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• Near Earth Object Program, AstroGuide Listing
• Lowell Observatory Near-Earth Object Search - LONEOS, AstroGuide Listing

... 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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... General information . ... Staff . Research staff . Technical, administrative & librarian staff . ... Staff in alphabetic order . Research . ... Technical reports . Projects . ... General interest seminars . ... IT Services . ... Information . Resources and catalogs . ... Historical highlights . Historical research . Historical archive . ... Projects and events . Online resources . ...

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• APOD: December 13, 1997 - The Coma Cluster of Galaxies
• Cannibal Stars Cause Giant Explosions in Fornax Cluster Galaxy (ESO Press
• Deep Space Objects

... galaxies: bulges galaxies: clusters: general galaxies: clusters: individual: . ... star formation statistics stellar content structure Cosmology ( cosmology :) cosmic background radiation ( cosmology :) cosmological parameters cosmology : miscellaneous cosmology : observations cosmology : theory ( cosmology :) dark ages, reionization, first stars ( cosmology :) dark energy ( cosmology :) dark matter ( cosmology :) diffuse radiation ( cosmology :) distance scale ( cosmology :) early Universe (...

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• articles_flera_en
• Discovery of an isolated dwarf spheroidal galaxy neighboring the Local Group
• articles_alex_01

... Dept. for Physics of Stars&Galaxies . ... Using a database view Sloan Digital Sky Survey (SDSS), containing almost a million spectra created 15,000 sample galaxies with active star formation, which is used for various studies and physical state of evolution of galaxies. ... Star clusters of the Galaxy . The project MWSC (Milky Way Star Clusters) directory using 2MASS, which includes nearly 500 million vision to the limit Ks = 15.3, analyzed more than 4,000 cluster-like objects in the galaxy. ...

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• The Laboratory of Astrometry
• Dept. for Physics of Stars&Galaxies

... 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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ADC CATALOG HOLDINGS SHORT TITLE LIST March 29, 2002 (adapted from ftp://adc.gsfc.nasa.gov/pub/adc/archives/catalogs/key) Category 1: Astrometric and Positional Data - March 29, 2002 1090 Positions of 502 Stars in Pleiades Region (Eichhorn+ 1970) 1107A Washington Cat Visual Double Stars 1984.0 (Worley, Douglass 1984) 1131A SAO Star ...

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• Deep sky objects 1