... 2014 September 4 . Cloud, Clusters and Comet Siding Spring . ... Explanation: On October 19th, a good place to watch Comet Siding Spring will be from Mars . Then, this inbound visitor (C/2013 A1) to the inner solar system, discovered in January 2013 by Robert McNaught at Australia's Siding Spring Observatory, will pass within 132,000 kilometers of the Red Planet. ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . NASA Web Privacy Policy and Important Notices . ...

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• APOD: 2008 September 17 - MACSJ0025: Two Giant Galaxy Clusters Collide
• APOD: 2006 September 10 - Star Clusters Young and Old
• APOD: September 21, 1999 - The Quintuplet Star Cluster

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. September 17, 1999 . M3: Half A Million Stars . ... Explanation: This immense ball of half a million stars older than the sun lies 30,000 light-years above the plane of our Galaxy. Cataloged as M 3 (and NGC 5272), it is one of about 250 globular star clusters which roam our galactic halo . ... About APOD > . ... NASA Technical Rep.: ...

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• APOD: September 22, 1998 - M61: Virgo Spiral Galaxy
• APOD: December 13, 1997 - The Coma Cluster of Galaxies
• APOD: 2000 August 4 - M15: Dense Globular Star Cluster

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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... Tombaugh 4 . ... 21.10.2006 . ... But the skilled and careful astronomer also went on to discover star clusters, comets, asteroids, and clusters of galaxies. For example, pictured is galactic or open star cluster Tombaugh 4 in the northern constellation Cassiopeia . ... Publications with keywords: open cluster - star cluster . Publications with words: open cluster - star cluster . ... M45: The Pleiades Star Cluster . ... X Ray Stars of Orion . Starburst Cluster in NGC 3603 . ...

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• XWare > APOD
• Messier 5
• Hubble s Messier 5

... 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

... Over the first 4 years, its X-ray telescopes eROSITA and ART-XC will survey the whole sky with a record sensitivity in the 0.5-10 keV energy band. ... The goal of the second international Spectrum-RG conference is to discuss the different scientific topics addressed by the mission, synergies with surveys at other wavelengths, and requirements to follow-up observations.Contributed talks and poster presentations are invited on the topics related to the SRG science goals. ... Active galactic nuclei . ...

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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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• The Pleiades

... 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: 252
• HST this week: 246

... 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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• JLE Dreyer
• Astronomy Today and the Role Played by the Hubble Space Telescope: Wednesday 17
• C.J. Butler, Research Astronomer

... 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 globular cluster
• The AstroStat Slog clusters

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
• Hubble shows us a spectacular star cluster | Astronotes
• Our Galaxy | Astronotes - Part 5

... The evolution of magnetic fields in OB-type stars from the study of open clusters of different ages . ... Wade G. A. The MiMeS Project: Magnetism in Massive Stars . ... Polosukhina N., Shavrina T., Drake N., Kudryavtsev D. Smirnova M. New results of the spectral observations of CPstars in the Li I 6708? spectral region with BTA telescope of SAO RAS . ... Magnetic Stars-2010 . ... List of participants . List of reports . ... Laboratory for the Stellar Magnetism Study of SAO of the RAS . ...

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• SCORPIO: IFP Gallery

The ETG Mass - Size relation in different environment from z~1.6 to present Simona Mei - GEPI - Observatory of Paris - University of Paris D. Diderot Marc Huertas-Company , Francesco Shankar , Lauriane Delaye, Rossella Licitra, Anand Raichoor, Mariangela Bernardi, Chris Lidman + ACS GTO, COSMOS collaborators Wednesday , September 4, 13 Anand Raichoor Marc Huertas-Company Lauriane Delaye Rossella Licitra Francesco Shankar Wednesday , ... 2013 HAWKI Cluster survey (Lidman et al. ...

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• Astrophysics Group AMI Science
• Astrophysics Group AMI-Planck

... Главная . ... Новости . ... Проекты . Любителям астрономии . Проект ISON . ... Подробнее . ... Категория: Новости проекта ISON . ... Метки: Космический мусор ,љ Астероиды ,љ Гамма-всплески ,љ Любителям астрономии ,љ Кометы љ . ... Метки: Космический мусор ,љ Астероиды ,љ Любителям астрономии љ . ... Новости обсерваторий проекта] - Обсерватория Кубанского государственного университета от Иванов А - 09.04.2016 11:08:49 . ... 1999-2013 Copyright "Астрономия и Телескопостроение" . ...

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... I follow the research lines as listed below. ... The subject of my thesis is: ``The center of the Fornax cluster: dwarf galaxies, cD halo, and globular clusters'', supervised by Prof. Dr. Tom Richtler . ... Globular Cluster Systems of early-type galaxies and merger remnants ( Fornax Cluster , NGC 720, NGC 5018, NGC 3115, NGC 5846, NGC 7192) [collaborators: M. Kissler-Patig, B. Dirsch, P. Goudfrooij, M. Hempel, D. Minitti, T. Puzia, T. Richtler ] . ...

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• ESO - star07
• ESO - ESO-Enews #14: September 2009
• ESO - Studying the Cosmological Evolution of Galaxy Clusters with (Sub-)mm

... 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
• Globular clusters with anomalously small masses, figures

... Star Atlas . ... stars . ... First transiting planets in a star cluster discovered . Astronomers have found two planets smaller than Neptune orbiting Sun-like stars in the star cluster NGC 6811. ... In the star cluster NGC 6811, astronomers have found two planets smaller than Neptune orbiting Sun-like stars. ... Kepler-66b and -67b are the smallest planets to be found in a star cluster and the first cluster planets seen to transit their host stars, which enables the measurement of their sizes. ...

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• Astronomers discover an ancient celestial city undergoing rapid growth |
• Web Extra: Astronomers animate one of the largest galaxy clusters ever observed
• A trio of open clusters in Cygnus, planetary nebula NGC 7139, and elliptical

... 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 1400-MHz Survey of 1478 Abell Clusters of Galaxies
• Nearby Galaxies Catalogue (NBG)
• Radio data

... 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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• Astro Imaging Workshop: Deep Sky Astro Imaging with a DSLR ? September 14, 2014
• Deep Sky Images by Joe DiNapoli ? Amateur Astronomers Association of New York
• Lecture Series 2015-2016 ? Amateur Astronomers Association of New York

... Bad Astronomy . ... Mad Science . ... Site Info . ... Public Talks . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Who is this guy who calls himself "The Bad Astronomer?" ... First, yes, I am a real live astronomer (when people ask me what astronomers do, I tell them "They astronom !" ... These are emitted by powerful objects like black holes, exploding stars, and super-dense neutrons stars. ... Finally, am I really a bad astronomer? ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Bitesize Astronomy