... 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: 2008 February 10 - Abell 2218: A Galaxy Cluster Lens
• APOD: 2004 February 17 - Galaxy Cluster Lenses Farthest Known Galaxy
• APOD: 2012 February 12 - Orion in Gas, Dust, and Stars

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2000 February 28 . The Sombrero Galaxy from VLT . ... FORS1 , VLT ANTU , ESO . ... Reasons include the Sombrero 's unusually large and extended central bulge of stars, and dark prominent dust lanes that appear in a disk that we see nearly edge-on. Billions of old stars cause the diffuse glow of the extended central bulge. ... About APOD | ...

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• APOD: 2000 August 4 - M15: Dense Globular Star Cluster
• APOD: February 21, 1996 - Millions of Stars in Omega Centauri
• APOD: February 22, 1999 - NGC 1316: After Galaxies Collide

... 15.05.2011 . ... Credit Copyright: NASA , ESA , and the Hubble Heritage Team ( STScI / AURA ) Explanation: What's going on in the center of this spiral galaxy? Named the Sombrero Galaxy for its hat-like resemblance, M104 features a prominent dust lane and a bright halo of stars and globular clusters . Reasons for the Sombrero 's hat -like appearance include an unusually large and extended central bulge of stars, and dark prominent dust lanes that appear in a disk that we see nearly edge-on . ...

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• The Sombrero Galaxy from Hale
• Star Clusters Young and Old
• Journal "Peremennye Zvezdy"

Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Starbursts are short-lived events, stars are forming so quickly that the reservoirs of interstellar gas from which stars are coalescing would be used up on a timescale much shorter than the age of the galaxy . ... Strong stellar winds from giant new stars in the starburst region combine with the blasts of supernovae to push a mighty flood of extremely hot gas, a ?superwind? from the galaxy thousands of light years into intergalactic space. ...

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• M55 globular cluster seen by ESO | Astronotes
• Wonders of the February Night Sky | Astronotes
• Orion, mighty hunter of the winter sky | Astronotes

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• The bright star cluster Messier 7 in the constellation of Scorpius | ESO
• Wide-field view of the bright star clusters Messier 47 and Messier 46
• Michael Hilker Research

... 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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• Pulsar Highlights - A Dozen new MSPs in Globular Clusters

... These Frontier Fields will combine the power of HST with the natural gravitational telescopes of high-magnification clusters of galaxies. ... We are soliciting gravitational lensing maps for the last four Hubble Frontier Fields clusters (MACSJ0717.5+3745, MACSJ1149.5+2223, AbellS1063, and Abell 370) based upon the exceptionally deep HST FF imaging and other new ancillary data. ... For the full set of proposal instructions and requirements, see the FY16 Frontier Fields Lensing Map Call for Proposals....

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• Surface Brightness Profiles
• Simulation of a Distant Cluster of Normal Galaxies
• Black Holes in Globular 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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• Low Surface Brightness Galaxy Gallery
• Astro-2 and the UIT Experiment
• Astronomy HyperText Book

... a spiral galaxy some million light years away, made by combining images . ... 1st February using the Armagh Robotic Telescope at the Armagh Observatory. ... Image credit: Simon Jeffery. Astronomers Simon Jeffery and Jack Wright have obtained their first images of deep-space objects using a new тАЬroboticтАЭ telescope at Armagh Observatory. ... Simon Jeffery, project scientist for the new telescope, said: "After two years of hard work, it is very satisfying to see the first images looking so good. ...

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• JLE Dreyer
• Sakurai?s Object (V4334 Sagittarii)
• Terry Mosely's Bulletins

... Bad Astronomy . ... Bitesize Astronomy . ... The next step up are true clusters, called open clusters . Open clusters (sometimes misleadingly called "galactic clusters") are groups of stars ranging in size from a few dozen stars up to tens of thousands. ... The youngest is about 1 or 2 million years old, while the oldest is about 6 or 7 billion years, making it just older than our own solar system. ... So by looking at the stars in the cluster we can tell pretty well how old they are. ...

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• Phil Plait's Bad Astronomy: Info

... 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
• Clusters of Galaxies
• A VLA Survey of Rich Clusters of Galaxies III

In autumn 1994, two groups of astronomers announced that they had discovered Cepheid variable stars in a distant cluster of galaxies. ... As the term suggests, variable stars change in brightness over time. ... Variable stars are an ideal way to get high-school students doing real science, with real data, from the real sky. ... a sky chart to find the stars . ... Students can use the nearby stars to estimate the magnitude of Delta. ... Locate the star Delta in Cepheus and estimate its brightness . ...

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• ASP: Big Clusters, Tiny Galaxies
• ASP: Globular Clusters and Satellite Galaxies: Companions to the Milky Way
• ASP: Black Holes to Blackboards: Drifting Through Andromeda

15m) Baerbel Koribalski (ATNF) "The HIPASS Bright Galaxy Survey" . ... 15m) Stuart Ryder (AAO) "HIPASS J0731-69: A New Tidal Feature in the NGC 2442 Group" . ... 15m) Meryl Waugh (U.Melbourne) "The Fornax Region: Searching for Clusters in HIPASS" . ... 15m) Martin Zwaan (U.Melbourne) "Constaints on the Space Density of Intragroup HI Clouds" . ... 15m) Lister Staveley-Smith (ATNF) "Mapping the Magellanic Stream" . ... 15m) Joss Bland-Hawthorn (AAO) "HIPASS HI clouds and the metagalactic UV field" . ...

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• Compact Stellar Systems in the Fornax Cluster: Super-massive Star Clusters or
• RV Tau Variables in Globular Clusters - clues on their nature?
• Blind HI Survey in the Centaurus and Fornax Clusters

Many intermediate-age star clusters in the Magellanic Clouds exhibit very unusual features in their colour-magnitude diagrams that suggest they may have formed their stars over periods spanning hundreds of millions of years per cluster. ... Nonetheless, this interpretation is enticing in the context of the formation of ancient globular clusters, which almost always exhibit puzzling abundance patterns that apparently require multiple episodes of star formation to explain. ...

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• http://www.mso.anu.edu.au/~bessell/thumbnails/images.txt
• http://www.mso.anu.edu.au/seminars/abstracts/20150804-1100.html
• Blue Straggler Stars

... Observing . ... Subscriber Extras . ... Web Extras . ... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . ... Observing springtime deep-sky objects with a large telescope . ... Web Extra: Astronomers animate one of the largest galaxy clusters ever observed . ... At the center of the Phoenix Cluster, a large elliptical galaxy lurks where the hot gas is ejected, giving off unprecedented levels of X-rays, which have been observed by the orbiting Chandra X-ray telescope. ...

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• The Queen's clusters | Astronomy.com
• February 2008 | Astronomy.com
• February 2004 | Astronomy.com

... 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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• Astro-Imaging ? Page 6 ? Amateur Astronomers Association of New York
• This MonthтАЩs Sky тАУ February 2016 ? Amateur Astronomers Association of New
• AAA Spring Astronomy Class: The Physics of Astronomy тАУ February ? March 2016

... 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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ATMoB "Open Cluster Observing Award " Guidelines Purpose: To promote observing among the membership of the Amateur Telescope Makers of Boston through participation in the Open Clusters Observing Awards program. Introduction: This awards program is oriented towards visually observing open clusters above magnitude 9.9. ... It turns out that a very unprejudiced and convenient method to dermine the limiting magnitude is to count the number of visible stars in certain areas on the sky. ...

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• Amateur Telescope Makers of Boston ATMoB Observing Awards Program
• Amateur Telescope Makers of Boston

... This paper ( Burke et al. 2003 ) describes the creation of one such catalogue - the Southern Serendipitous High-redshift Archival ROSAT Cluster (SHARC) survey - which covers an area of 17.7 deg 2 and consists of 32 clusters with redshifts between 0.05 and 0.7 and X-ray luminosities between 7 x 10 42 and 4 x 10 44 erg/s: the high-redshift subsample contains 16 clusters with = 0.3 and X-ray luminosities greater than 2 x 10 43 erg/s (luminosities are quoted for the 0.5 - 2.0 keV energy band). ... 1997 ...

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• The AstroStat Slog Blog Archive my first AAS. IV. clustering
• The Chandra Multiwavelength Project (ChaMP)
• A matrix of tweets from #AAS221

You Can Make Stellar Images Brighter . Articles | ... A few months ago I wrote an article titled "You Can’t Make Them Brighter". So why am I now writing that you can make them brighter. ... The image of a focused star is actually a small disk called the Airy disk, named after the 19 th century scientist Sir George Airy. ... For a given aperture, a smaller Airy disk means that the light is focused to a smaller disk and is therefore brighter. ... www.astronomy.net . About Astronomy Net | ...

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• The Astronomy Shop - Books - by Astronomy Net
• Amateur Astronomers Of Central Iowa, AstroGuide Listing
• Brightest Northern Hemisphere Galaxy - an Astronomy Net Education Forum Message