... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2003 December 27 . The Pleiades Star Cluster . ... Explanation: Perhaps the most famous star cluster on the sky, the Pleiades can be seen without binoculars from even the depths of a light-polluted city . ... About APOD | ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...

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• APOD: 2009 December 21 - Star Cluster R136 Bursts Out
• APOD: 2003 December 2 - NGC 869 and NGC 884: A Double Open Cluster
• APOD: 2005 December 30 - The Perseus 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: December 18, 1999 - Irregular Galaxy Sextans A
• APOD: December 30, 1998 - Supernova 1994D and the Unexpected Universe

Elliptical Galaxy M87 . ... Credit Copyright: Anglo-Australian Telescope Board Explanation: Elliptical galaxy M87 is a type of galaxy that looks much different than our own Milky Way Galaxy . But even for an elliptical galaxy M87 is peculiar. M87 is much bigger than an average galaxy, appears at the center of a whole cluster of galaxies known as the Virgo Cluster, and shows a very high number of globular clusters . ... NASA Web Site Statements, Warnings, and Disclaimers . ...

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• The Double Cluster
• The Pleiades Star 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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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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Joshua Tusin, Director of Public Relations for JYI , sent us the following description of the journal. ... Feature Editors . ... Inquire with the Director of Public Relations, Joshua Tusin, by e-mailing him at: tusin@jyi.org . The Journal of Young Investigators ( JYI , www.jyi.org) is an on-line science journal dedicated to publishing excellent undergraduate research papers and feature-type science articles covering all fields of science. ... Journal of Young Investigators (http://www.jyi.org) . ...

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• The AstroStat Slog Blog Archive my first AAS. IV. clustering

... This represents the first HI selected sample covering the core and the outskirts of a local cluster of galaxies. ... Optically selected samples miss a considerable number of low luminosity, low surface brightness galaxies underestimating by almost a factor 2 the number of HI rich galaxies present in the cluster volume. ... Right: The g band luminosity function for galaxies in the A1367 volume as obtained from the optically (circles) and HI (histogram) selected sample. ...

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• http://www.naic.edu/alfa/ealfa/papers/2005AAS...20719202M.pdf
• The Pleiades
• naic newsletter

... A brief discussion of the potential and problems of the Astronomy Thesaurus and UDC classification system took place. ... The introduction to the thesaurus explains its use and construction in detail (Shobbrook & Shobbrook 1993a). ... Discussion ensued about the use or rather non-use of the thesaurus by the editors of the core astronomy journals. ... A sprinkling of hands was raised in answer to the question of who uses UDC and those people were invited to form a separate discussion group. ...

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• Is the Crab Pulsar Showing A 60-second Periodic Modulation?
• December 2011
• The Document Resources of Purple Mountain Observatory Library

... Recent Topics . ... MAO main . ... Free 30 minute lecture: How do Editors look at your paper? . ... От: Publishing Campus <journals@mail.elsevier.com> Кому: This email address is being protected from spambots. ... Отправлено: Fri, 28 Aug 2015 20:52:15 +0300 (EEST) Тема: Free 30 minute lecture: How do Editors look at your paper? ... Publish and get noticed: Free 30 minute lectures for authors . ... Copyright ї 2015 Elsevier B.V. All rights reserved. ... MAO NASU . ...

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• MAO NASU :: Topic: Anthropocene Editor's Choice (1/1)
• MAO NASU :: Topic: Call for Papers (1/1)
• MAO NASU :: Topic: Submit a paper to the International Journal of Earthquake

... Automatic classification of large catalogs may be carried out for survey objectives, or to elucidate the catalog's contents in a minimally-restricted way. ... 1992; Murtagh & Hern?ndez-Pajares 1994; Hern?ndez-Pajares et al. 1994): each item in a multidimensional input data set is assigned to a cluster center; the cluster centers are themselves ordered by their proximities; and the cluster centers are arranged in some specific output representational structure, often a regularly-spaced grid. ... 1994...

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• Automated Globular Cluster Photometry with DASHA
• Object Detection Using Multi-Resolution Analysis
• Clustering Analysis Algorithms and Their Applications to Digital POSS-II

August 24, 2004 - Dr. Harold McNamara, Professor of Astronomy at Brigham Young University, has retired as Managing Editor of the ASP's Conference Series. Associate Editor Dr. J. Ward Moody, also a Professor of Astronomy at BYU, has been named Interim Managing Editor. In 1968, Dr. McNamara became Editor of the refereed journal Publications of the ASP (PASP). ... Interim Managing Editor J. Ward Moody received his PhD in astronomy from the University of Michigan in 1986. ...

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• ASP: New PASP Editor Appointed
• ASP: Contents, November/December 1997
• ASP: Career Opportunities

Typing ESC U causes the Common Output Area to be overlaid by a Unix shell window or, if the Unix shell is already present, causes the window to be popped down. The shell used is /bin/csh . ... Behind the scenes' Hermes will remain active, but because all typing goes into the shell, user communication with Hermes is not possible. ... Typing CTRL-X E causes the user to be prompted for the name of a file to be edited by a text editor which will overlay the whole terminal screen. ...

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. Moscow Mathematical Journal . Published by the Independent University of Moscow . Editors: Yulij Ilyashenko and Michael Tsfasman . MMJ homepage has been moved to new location: www.ams.org/distribution/mmj/ . Download abstracts of volumes 1-2 (2001-2002) [ PDF 312 K ] . Moscow Mathematical Journal . is distributed by the . American Mathematical Society for the . Independent University of Moscow . Online ISSN 1609-4514 . 2002, Independent University of Moscow . Comments: mmj@mccme.ru

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• Labo J.-V.Poncelet: M.Tsfaman
• Labo J.-V.Poncelet: A.Shen

Participant 5 (P5) ================== Dr. V.P. Tishkovets - Astronomical Observatory, Kharkov University, UA Dr. N.N. Kiselev - Astronomical Observatory, Kharkov University, UA P.V. Litvinov - 26 years old; Astronomical Observatory, Kharkov University, UA S.A. Beletsky - 28 years old; Astronomical Observatory, Kharkov University, UA The head of the team, Dr. Tishkovets, and Mr. Litvinov made many investigations of light scattering by clusters of particles - analogues of interplanetary dust grains. ...

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News & Views There seems to be something very healthy about astronomical research when, under the same cover, an event which took place in 1333 AD (Leonid bursts as a resonance meteoroid component from Comet Temple/Tuttle) is discussed followed by a paper on how we might more effectively search for extraterrestrial intelligence (in the optical). In this issue we also have a further paper on young clusters (Praesepe) and the low end of the stellar mass function (see IAJ , 1999, 26(1), 17). ...

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• The Irish Astronomical Journal
• IAJ: Staff
• IAJ: History

... Low-Latitude Atmosphere-Ionosphere Effects Initiated by Strong Earthquakes Preparation Process . ... Ionospheric and atmospheric anomalies registered around the time of strong earthquakes in low-latitude regions are reported now regularly. ... Segregation of low-latitude regions for special consideration is connected with the important role of ionospheric equatorial anomaly in the seismoionospheric coupling and specific character of low-latitude earthquake initiated effects. ...

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• http://www.iki.rssi.ru/comp/2010/BK.htm
• The Wind Spacecraft

... The overall globular cluster population is divided by gap in the metallicity function at [Fe/H]=-1.0 into two discrete groups with well-defined maxima at [Fe/H]=-1.60?0.03 dex, and -0.60?0.04 dex. ... Clusters with extremely blue horizontal branches occupy a spherical volume of radius ~ 9 kpc, have high rotational velocities ( V rot =77?33 km/s), have substantial and equal negative radial and vertical metallicity gradients, and are, on average, the oldest group (the old-halo subsystem). ...

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• Population of Galactic globular clusters, figures
• Subsystems of the Galactic halo, figures

... Observatory . ... Science . ... Science Users Information > Science Publications > Archive of the ESO Enews > ESO-Enews #3: March 2007 . ... The Call for Proposals for observations at the ESO telescopes during Period 80 (October 1, 2007 - March 31, 2008) has been released. ... The full Call for Proposals and the ESOFORM electronic submission package can be obtained at http://www.eso.org/observing/proposals/index.html . ... For more information see http://www.eso.org/gen-fac/meetings/agnii2007/ . ...

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• ESO - Thesis Topic: Dynamical models of multiple globular cluster populations
• ESO - star07
• Media Advisory: ESO to hold media teleconference on 11 December to present

... Tonight's Sky . ... The Magazine . News . Observing . ... Magazine . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Astronomy for Kids . ... December 2015 . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

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• Editors of Astronomy magazine | Astronomy.com
• Open cluster NGC 1027, the Perseus Lenticular (NGC 1023), and the Fornax Dwarf
• December 2013 | Astronomy.com

... 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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• Electronic version of Russian Bulletin
• articles_olga_eng
• articles_eng