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1. Amateur Telescope Makers of Boston
. This is a new popup window - close it when you are done . Submitted by Mario Motta M.D. on 07/03/2010 19:15:05 . Abel 2151 . Great galactic cluster in hercules . Logon to post a follow-up comment or review comments from others . Copyright (c) Amateur Telescope Makers of Boston, Inc. About Us Contact Us
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Ссылки http://www.atmob.org/gallery/showimage.php?id=1317 -- 2.9 Кб -- 09.04.2016
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2. M13: The Great Globular Cluster in Hercules
... M13: The Great Globular Cluster in Hercules . ... A system of stars numbering in the hundreds of thousands, it is one of the brightest globular star clusters in the northern sky. At a distance of 25,000 light-years, the cluster stars crowd into a region 150 light-years in diameter, but approaching the cluster core over 100 stars would be contained in a cube just 3 light-years on a side. ... Publications with keywords: globular cluster - star cluster . ... Globular Star Cluster M3 . ...
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Ссылки http://www.astronet.ru/db/xware/msg/apod/2007-11-15 -- 14.2 Кб -- 15.11.2007
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3. APOD: 2007 November 15 - M13: The Great Globular Cluster in Hercules
... 2007 November 15 . M13: The Great Globular Cluster in Hercules . ... Explanation: M13 is modestly recognized as the Great Globular Cluster in Hercules . ... At a distance of 25,000 light-years, the cluster stars crowd into a region 150 light-years in diameter, but approaching the cluster core over 100 stars would be contained in a cube just 3 light-years on a side. ... Among the distant background galaxies also visible, NGC 6207 is above and to the left of the Great Globular Cluster M13 . ...
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Ссылки http://www.sai.msu.su/apod/ap071115.html -- 5.2 Кб -- 21.12.2007
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4. Messier 13 Great Globular Cluster in Hercules (M13) - шаровое скопление NGC
... Messier 13 Great Globular Cluster in Hercules (M13) - шаровое скопление NGC 6205 (Melotte 150) в созвездии Геркулес (Hercules) .. ... Просмотр полной версии : Messier 13 Great Globular Cluster in Hercules (M13) - шаровое скопление NGC 6205 (Melotte 150) в созвездии Геркулес (Hercules) .. ... Messier 13 Great Globular Cluster in Hercules (M13) - шаровое скопление NGC 6205 (Melotte 150) в созвездии Геркулес (Hercules (http://www.starlab.ru/showpost.php?p=480881&postcount=1)) .. ... Messier 13 (M13) .:...
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Ссылки http://www.starlab.ru/archive/index.php/t-18813.html -- 9.5 Кб -- 10.04.2016
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5. The AstroStat Slog Blog Archive my first AAS. IV. clustering
... 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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Ссылки http://hea-www.harvard.edu/AstroStat/slog/groundtruth.info/AstroStat/slog/2008/my-first-aas-iv-clustering/index.html -- 24.2 Кб -- 01.03.2014
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6. APOD: 2000 January 4 - Galaxies Cluster Toward the Great Attractor
... 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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Ссылки http://www.arcetri.astro.it/~palla/ANDREAIMMAGINI/Galassie/gacluster_wfi_big.html -- 4.7 Кб -- 04.03.2001
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7. GOODS: The Great Observatories Origins Deep Survey
... GOODS unites extremely deep observations from NASA's Great Observatories, Spitzer , Hubble , and Chandra , ESA's Herschel and XMM-Newton , and from the most powerful ground-based facilities, to survey the distant universe to the faintest flux limits across the electromagnetic spectrum. ... The space-based observations are complemented by ground-based imaging and spectroscopy, including extensive commitments of ESO and NOAO observing time. ... 2010-04-10: Deep VLA 1.4 GHz data for GOODS-North . ...
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Ссылки http://www.stsci.edu/science/goods/ -- 16.1 Кб -- 19.05.2010
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8. Omega Centauri: globular cluster of 300,000 stars | Astronotes
Astronotes Armagh Planetarium's Stellar Blog! ... Milky Way . Stars . ... This dramatic image depicts Omega Centauri, one of 200 or so globular clusters orbiting our Milky Way galaxy. ... Swarms of tightly packed stars, numbering in the thousands to low millions, globular clusters are cosmic fossils, relics of the early times of our galaxy. Omega Centauri may actually be the core of a smaller galaxy ripped apart and assimilated by our own Milky Way in the distant past. ...
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Ссылки http://www.armaghplanet.com/blog/omega-centauri-300000-stars-at-once.html -- 44.2 Кб -- 09.04.2016
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9. astro-ph authors/title/abstract search for 'galaxy cluster' (skipped 200) all
Title: A New Model of the Gravitational Lens 0957+561 and a Limit on the Hubble Constant . Authors: Norman A. Grogin , Ramesh Narayan (Harvard Univ.) ... Title: ROSAT/PSPC observation of the distant cluster CL0939+472 . ... Title: Interaction in the Bimodal Galaxy Cluster A3528 . ... Title: Cosmological Implications of Galaxy Cluster Evolution . ... Title: Galaxy Cluster Virial Masses and Omega . ... Matches 201 to 222 from a total of 222 matches for the search pattern galaxy cluster . ...
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Ссылки http://sed.sao.ru/lit/gal_clust3.html -- 18.6 Кб -- 17.07.2001
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10. Astronomy HyperText Book: Stellar Clusters
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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Ссылки http://zebu.uoregon.edu/textbook/sc.html -- 3.5 Кб -- 23.01.1998
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11. Researchers find black hole in globular cluster | Astronomy.com
... Tonight's Sky . ... Behemoth black hole found in an unlikely place . ... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . ... Researchers find black hole in globular cluster . Astronomers find a third black hole in a globular cluster. ... Researchers are now thinking it was the former, as evidence of yet another black hole has been found in a globular cluster by an MSU-led team of researchers. A new black hole candidate has been found in globular cluster M62. ...
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Ссылки http://www.astronomy.com/news/2013/11/researchers-find-black-hole-in-globular-cluster -- 68.2 Кб -- 10.04.2016
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12. Deep Sky Images by Joe DiNapoli ? Amateur Astronomers Association of New York
... Home Gallery Astrophotography Deep Sky Images by Joe DiNapoli . ... Deep Sky Images by Joe DiNapoli . ... Deep Sky Gallery by Ed Fox . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . Observing Resources for Amateur Astronomers - Part 2: Intermediate Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...
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Ссылки http://www.aaa.org/gallery-2/astrophotography/deep-sky-images-by-joe-dinapoli/ -- 117.7 Кб -- 10.04.2016
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13. The Great Attractor
... A major part of my PhD thesis consisted of distance measurements to early-type galaxies in the Hydra and Centaurus clusters ( Mieske et al. 2005 , see the two figures below). ... The results of our distance measurements implied a significant peculiar velocity of the Hydra cluster , and a negligible peculiar velocity for Centaurus . This finding is consistent with a massive Great Attractor (~10^16 M_sun) at 45-50 Mpc distance, closer in projection to Hydra than to Centaurus . ...
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Ссылки http://www.eso.org/~smieske/ga.htm -- 6.3 Кб -- 12.08.2008
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14. Comments
... The hot pixel finding algorithm has some difficulty dealing with on-board split-event reconstruction (SER). Multi-pixel telemetered events (items in the PIXELS table with SHAPE greater than zero, GRADE greater than one) cannot be compared directly to the thresholds set by the noise limit parameters. ... If a telemetered event passes this aggregate cut, each of its comprising pixels must be taken to pass as well, despite that the reality might be otherwise. ...
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Ссылки http://xmm.vilspa.esa.es/sas/6.5.0/doc/rgsbadpix/node9.html -- 4.9 Кб -- 16.08.2005
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15. Astronomical Society of Greater Hartford - ASGH, AstroGuide Listing
The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . The ASGH is an organization incorporated in the State of Connecticut with 90 members. Its goal is the advancement of amateur astronomy. They help sponsor the Connecticut State Science Fair and run StarConn with lectures astronomy, vendors and swap tables. ... Listed Since October 22, 1998 . ... Web Site . ... dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...
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Ссылки http://www.astronomy.net/astroguide/ag55.html -- 12.6 Кб -- 09.04.2016
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16. Radio data
Radio data are displayed in the following format: . After the title with name of cluster under examination and with line about kind of data under one, e.g. Radio data [ optical data ] [ radio source identifications ] [ radio spectra (1.0 or 1.1) ] . ... The first line contains the number of radio sources associated with the cluster (these are just those sources with entries in sections 'Radio galaxy', 'Radio source' and 'Radio spectrum' below). ... Radio sources in cluster: 2 # . ...
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Ссылки http://www.sao.ru/cats/~CLUSTERS/CLUSTERS/rad_dat.html -- 7.6 Кб -- 04.12.1999
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17. Vladimir Marsakov Abstracts
... We found that 10 metal-poor globular clusters are greately distinguished for anomalously small masses on the "destruction rate-mass" plain. As it turned out, these poor clusters, situated 15 kpc farther from the Galactic centre, are somewhat younger than the bulk of the metal-poor globulars, and have anomalously red horizontal branches. ... At the same time, deficiency of distant massive clusters is noticeable with increasing distance from the galactic centre. ...
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Ссылки http://ip.rsu.ru/~marsakov/abs/abst32.htm -- 4.6 Кб -- 02.02.2007
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18. News
... ISC Kosmotras . Top Management Founder of ISC Kosmotras - Dr. Vladimir A. Andreev News . ... ISC 'Kosmotras' Director General held a meeting with the Ambassador Extraordinary and Plenipotentiary of the United Arab Emirates to the Russian Federation. Mr. Vladimir Andreev, Director General of ISC Kosmotras , held a meeting with His Excellency Mr. Omar Saif Ghobash, Ambassador Extraordinary and Plenipotentiary of the United Arab Emirates to the Russian Federation on April 16, 2009. ... Dnepr LV . ...
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Ссылки http://www.kosmotras.ru/en/news/page10/ -- 13.4 Кб -- 09.04.2016
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19. GCVS Research Group: Homepage.
. of Lomonosov Moscow State University, . Russia . GCVS Research Group . Catalogues of Variable Stars . Future Prospects of Variable-Star Catalogues . B.V. Kukarkin Centenary Conference: Variable Stars, the Galactic Halo and Galaxy formation (VS-Halo) . What's new . Recent publications . Digitization of Moscow Plate Archive . The "Peremennye Zvezdy" (Variable Stars) journal . Send questions and comments to Olga Durlevich .
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20. On current distance scales for open clusters
... In 1930, Trumpler noticed that linear diameters (LD) of open clusters increase with distance (D) from the Sun. ... Since that time, the interstellar absorption has become one of the best studied factor in astrophysics, and we may hope that current OCL distance scales are free from this LD-D correlation. To verify if this is the case we have chosen several modern OCL distance scales and test them with the same clusters and the same angular diameters that Trumpler had used back in 1930. ...
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Ссылки http://www.inasan.rssi.ru/~dwiebe/abstracts/dist.html -- 4.2 Кб -- 27.09.2012
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