... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. September 19, 1997 . Globular Cluster 47 Tucanae . ... Explanation: Stars come in bunches. Of the over 200 globular star clusters that orbit the center of our Milky Way Galaxy , 47 Tucanae is the second brightest globular cluster (behind Omega Centauri ). ... About APOD > . ...

Еще в разделе: (Показать все результаты (>8461) - www.sai.msu.su/ )

• APOD: 2006 September 10 - Star Clusters Young and Old
• APOD: 2001 September 9 - NGC 3293: A Bright Young Open Cluster
• APOD: 2012 September 12 - M7: Open Star Cluster in Scorpius

... Globular Cluster 47 Tucanae from SALT . ... Credit: South African Astronomical Observatory Explanation: Stars come in bunches. Of the over 200 globular star clusters that orbit the center of our Milky Way Galaxy , 47 Tucanae is the second brightest globular cluster, behind Omega Centauri . ... NASA Web Site Statements, Warnings, and Disclaimers . ... Publications with keywords: globular cluster - 47 Tuc . Publications with words: globular cluster - 47 Tuc . ... Globular Star Cluster M3 . ...

Еще в разделе: (Показать все результаты (>168059) - www.astronet.ru/ )

• Globular Star Cluster NGC 6752
• Астронет > Globular Cluster 47 Tucanae from SALT
• Globular Cluster 47 Tucanae

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! ...

Еще в разделе: (Показать все результаты (>2798) - www.armaghplanet.com/ )

• Omega Centauri: globular cluster of 300,000 stars | Astronotes
• NGC4666: Secrets of a Starburst Galaxy | Astronotes
• stars | Astronotes - Part 5

... 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 ...

Еще в разделе: (Показать все результаты (>3371) - hea-www.harvard.edu/ )

• Doug Burke: Publications List

... 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 ] . ...

Еще в разделе: (Показать все результаты (>66772) - www.eso.org/ )

• The bright star clusters Messier 47 and Messier 46 in the constellation of
• The location of the bright star cluster NGC 3532 in the constellation of Carina
• The bright star cluster Messier 7 in the constellation of Scorpius | ESO

... 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.: ...

Еще в разделе: (Показать все результаты (>7359) - www.arcetri.astro.it/ )

• APOD: September 22, 1998 - M61: Virgo Spiral Galaxy
• APOD: 2000 August 4 - M15: Dense Globular Star Cluster
• APOD: September 5, 1998 - The Pulsar Powered Crab

... Donate to Support Science Literacy . ... 2016 Annual Awards . The ASP is accepting nominations for the organizationтАЩs national annual awards which recognize special achievements in astronomy research, technology, education, and public outreach. ... Shop the AstroShop . ... The Astronomical Society of the Pacific (ASP) is accepting nominations for the organizationтАЩs national annual awards which recognize special achievements in astronomy research, technology, education, and public outreach.. ...

Еще в разделе: (Показать все результаты (>1681) - www.astrosociety.org/ )

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

... All previous such superstars have been found along with many companion stars in the centres of crowded star clusters. The star is known as VFTS 682 from the VLT-FLAMES Tarantula Survey catalogue of the European Southern Observatory's Very Large Telescope (VLT) located at Paranal in Chile by means of the attached FLAMES instrument. ... Although VFTS 682 seems to be alone now it is not very far away from a very rich star cluster known as RMC 136 that contains several similar superstars. ...

Еще в разделе: (Показать все результаты (>2886) - star.arm.ac.uk/ )

• JLE Dreyer
• Astronomy Today and the Role Played by the Hubble Space Telescope: Wednesday 17
• William Herschel

... 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....

Еще в разделе: (Показать все результаты (>13522) - www.stsci.edu/ )

• Black Holes in Globular Clusters
• Globular Cluster NGC 5986
• HST this week: 252

... Radio source identifications . The Web-server of the Astronomical Institute of the St.-Petersburg University opens the experimental service on assignment of clusters data. At present only the data about radio sources in ACO clusters of galaxies are reasonably complete, while only restricted optical information is in our database. Later on, we also intend to include X-ray data and data about brightest cluster galaxies (BCG). ... ACO: radio optic ( for example, A0690 and " optic "), . ...

Еще в разделе: (Показать все результаты (>900) - www.sao.ru/ )

• A 1400-MHz Survey of 1478 Abell Clusters of Galaxies
• A 20 cm VLA survey of Abell clusters of galaxies
• Catalog of Galaxies behind the Milky Way

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. ...

Еще в разделе: (Показать все результаты (>209) - zebu.uoregon.edu/ )

• Astronomy HyperText Book
• Astro-2 and the UIT Experiment

... 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) ...

Еще в разделе: (Показать все результаты (>1773) - www.naic.edu/ )

• Pulsar Highlights - A Dozen new MSPs in Globular Clusters

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . ... Mopra radio telescope . ... Australia Telescope 20GHz Survey . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... The results of 21 cm H I survey observations are presented for two fields, centered on the Centaurus and Fornax southern galaxy clusters. ... Implications for the Parkes Multibeam All Sky Survey . ...

Еще в разделе: (Показать все результаты (>13142) - www.atnf.csiro.au/ )

• RV Tau Variables in Globular Clusters - clues on their nature?
• Compact Stellar Systems in the Fornax Cluster: Super-massive Star Clusters or
• ATNF Colloquium

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 | ...

Еще в разделе: (Показать все результаты (>1241) - www.astronomy.net/ )

• Articles written by astronomers for astronomers of all ages.
• The Astronomy Shop - Books - by Astronomy Net
• Astronomical Society Of Southern New England - Assne, AstroGuide Listing

... Club By-laws . ... Other Club Activities . ... Public Nights . ... Dr. James Green, NASA, Director Planetary Science will be our esteemed speaker on Tuesday, April 12, 2016 at 7:30 PM in Peyton Hall on the Princeton University campus. ... Our astronomers setup telescopes for public use at Communiversity in Princeton, Super Science Saturday at the NJ State Museum in Trenton and at various public events around Mercer County. ... Amateur Astronomers Association of Princeton, Inc., ...

Еще в разделе: (Показать все результаты (>118) - www.princetonastronomy.org/ )

... 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" . ...

Еще в разделе: (Показать все результаты (>3) - www.astronomer.ru/ )

... 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. ...

Еще в разделе: (Показать все результаты (>222) - ocl.sai.msu.ru/ )

... BLUE STRAGGLER STARS are unusually hot and bright stars found in the cores of ancient star clusters known as globulars. ... BACKGROUND (from wikipedia): Blue straggler stars are stars in open or globular clusters that are hotter and bluer than other cluster stars having the same luminosity. ... There is evidence in favor of this view, notably that blue straggler stars appear to be much more common in dense regions of clusters, especially in the cores of globular clusters. ...

Еще в разделе: (Показать все результаты (>615) - www.mso.anu.edu.au/ )

• IAU Commission #37 (Star Clusters and Associations)
• Julie Banfield | Astronomer
• Dougal Mackey - Conference Proceedings

... 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. ...

Еще в разделе: (Показать все результаты (>340) - www.badastronomy.com/ )

• Phil Plait's Bad Astronomy: Info

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. ...

Еще в разделе: (Показать все результаты (>441) - www.atmob.org/ )

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