... 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 NGC 7788
• SAI OCL Catalog King 20
• SAI OCL Catalog King 8

... Editor's choices for the most educational Astronomy Pictures of the Day about clusters of galaxies: . APOD: 2006 March 21 - The Coma Cluster of Galaxies . ... APOD: 2005 November 22 - A Galactic Collision in Cluster Abell 1185 . ... A prominent example occurs on the left of the above image of the rich cluster of galaxies Abell 1185. ... Recent observations of Abell 1185 have found unusual globular clusters of stars that appear to belong only to the galaxy cluster and not to any individual galaxy. ...

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• Отдел Изучения Галактики и переменных звезд
• APOD Index - Stars: Globular Clusters
• APOD Index - Dark Matter

Astronomy Discussion Forums . ... What I See . ... Follow Ups | Post Message | ... I have observed the Double Cluster, the BeeHive cluster and other open and various Globular Clusters. My main problem with my 114mm reflector is in its inabliity to bring deep sky objects. ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• S.T.A.N.O. Components Inc., AstroGuide Listing

Next: Transparency of the Stochastic Up: Model of the Galaxy Previous: Frequency distribution of galactic . ... The parameters of the model resulted from a numerical fitting of various data, such as the observed distribution of the young star population and neutral hydrogen, the density of population II stars in the vicinity of the Sun, the galactic rotation curve and the dynamics and distribution of globular clusters   and dwarf irregular satellites of the Galaxy. ...

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• Be/X-ray binaries and candidates
• ADS Abstract Service Results
• Seminars

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
• NGC4666: Secrets of a Starburst Galaxy | Astronotes

... Observations . Objects . ... Canis Major . ... Canis Minor . ... Leo . ... Leo Minor . ... Ursa Major . ... Ursa Minor . ... Herschel 2500 . ... Herschel 400 (I) . ... Globular Clusters . ... AL Globular Club . ... AL Planetary Club . ...

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• http://www.wro.org/neumann/observations.html
• http://www.wro.org/scodova/astronomical_lists.html
• http://www.wro.org/neumann/astronomical_lists.html

... We address a question if globular clusters (GC) in a protogalaxy could for some time evolve chemically as isolated systems, enriching themselves with heavy elements produced in first supernova events that follow initial star formation. We determine both the critical mass of a protoglobular cluster that is needed to retain the ejecta of the very first supernova, and the critical energy (i.e., number of supernovae) that is needed to expel the residual gas from a cluster of a given mass. ...

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• Starlight Polarization
• On current distance scales for open clusters
• Circular Polarization

... Subject and Problems of Stellar Astronomy. ... Plane of Galaxy, Methods of Its Location Determination. ... Stars Distances. ... Other Methods of Stars Distances Determination. ... Tangential Velocities, Their Determination by Self-Motions. ... Determination of Solar Apex and Spatial Velocity by Radial and Spatial Velocities of Stars. ... Features of Orientation and Parameters of Peculiar Stellar Velocities Ellipsoid. ... General and Selective Light Absorption in Galaxy. ... Darc Clouds in Galaxy. ...

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• SPECTRUM ANALYZER OF MAGNETIC PHENOMENA SAMW

... Galaxies 99 Cosmic background with model of cloudy interstellar medium Yu. ... Figure 1: Averaged spectrum of the cosmic background I f in frequency range 0.25 200 MHz for the Galactic poles. ... First interpretation of the cosmic noise background spectrum at broad band frequency range 0.25 200 MHz with a model of the cloudy interstellar medium ISM is presented here. ... Synthesized background spectra I f for regions of the Galactic poles at the frequency range 0.25 200 MHz is presented in Fig. ...

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• http://www.gao.spb.ru/english/as/j2014/presentations/perepelkin.pdf
• http://www.gao.spb.ru/english/publ-s/viii-rfs/p081.pdf
• http://www.gao.spb.ru/english/publ-s/viii-rfs/p091.pdf

... MACS 1206: A Galaxy Cluster Gravitational Len . ... Credit Copyright: NASA , ESA , M. Postman ( STScI ), and the CLASH Team Explanation: It is difficult to hide a galaxy behind a cluster of galaxies. The closer cluster's gravity will act like a huge lens , pulling images of the distant galaxy around the sides and greatly distorting them. ... Publications with keywords: galaxy cluster - gravitational lens . ... Galaxy Cluster Abell 1689 Deflects Light . ... The Hydra Cluster of Galaxies . ...

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• Астронет > Archive of Astronomical and Astrophysical Transactions
• XWare > APOD

The magnetic fields of peculiar A and B stars in open clusters John D Landstreet University of Western Ontario London, Upper Canada 22.2.200821 June 2005 Armagh Observatory Workshop 1 The Team: · · · · · · Stefano Bagnulo, Armagh Observatory (N Ireland) Vincenzo Andretta, INAF (Italy) Luca Fossati, Vienna ... 22.2.200821 June 2005 Armagh Observatory Workshop 8 Cluster magnetic Ap stars · Ap's in clusters would have more accurate ages. ...

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• C.J. Butler, Research Astronomer
• Armagh Observatory
• Explosive Events

... 1st Announcement IAU Symposium 312 Star Clusters and Black Holes Across Cosmic Time, Beijing, China, Aug. 25-29, 2014 . ... SUBJECT: 1st Announcement IAU Symposium 312 Star Clusters and Black Holes Across Cosmic Time, Beijing, China, Aug. 25-29, 2014 . ... which will be held in Beijing, P.R. China, from August 25-29, 2014, hosted by Chinese Academy of Sciences . ... China), . ... 1st Announcement IAU Symposium 312 Star Clusters and Black Holes Across Cosmic Time, Beijing, China, Aug. ...

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• MAO NASU :: Topic: The DRAGON globular cluster simulations: a million stars,
• The Laboratory of Astrometry
• Achievements - Page 4

... LMC Project Outline . NGC 1818 Initial Results . ... The Large Magellanic Cloud (LMC) is uniquely suitable for the study of massive star clusters at all stages of evolution. By combining HST observations of these clusters with N-body models we hope to understand the origin and evolution of rich star clusters in our own Galaxy, in the LMC, and beyond. ... We aim to combine our HST observations with N-body models to understand the formation and evolution of globular clusters. ...

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• NICMOS Observes the Galactic Center
• NICMOS/HST H-band (F160W) Images of the 30 Dor Starburst Cluster
• NICMOS Science

ARCSAT ID NUMBER: AS10 DESCRIPTIVE TITLE: Monitoring H-alpha Variability in Be Stars in Young Clusters PI: Steven Souza ( Williams College ) OBSERVER(S): Steven Souza UNCERTIFIED/UNTRAINED OBSERVERS: Michael May, Sarah Stevenson ( Williams College summer research students; week 1 dates only) COLLABORATORS: none CONTACT INFORMATION: Steven Souza ; ssouza@ williams .edu; 413-441-9892 TIME ...

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• http://www.apo.nmsu.edu/Telescopes/ARCSAT/ObsSchedules/arcsat_may2015/AS09.html
• http://www.apo.nmsu.edu/Telescopes/ARCSAT/ObsSchedules/arcsat_oct2015/AS06.html
• http://www.apo.nmsu.edu/Telescopes/ARCSAT/ObsSchedules/arcsat_oct2014/AS06.html

. An example of ULF electromagnetic fields detection by the IESP-2M instrument. The figure presented is the dynamic spectrogram. E and B components are measured in satellite coordinates. Observations were made in the auroral region. Electromagnetic turbulence, which was observed mostly in electric components, is typical for this phenomenon. Fig.1 .

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• Main results of the experimental and theoretical research completed in 2009
• Multipoint correlations of the solar wind parameters observed by several
• Discovery of the Sunspot Cycle

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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• astro-ph abstracts (body) search for 'steep spectrum ' all years (1992-2001)
• astro-ph authors/title/abstract search for 'galaxy cluster' all years

Armed with these assumptions, observations, and laws, cosmologists try to build a theory of the development, or evolution, of the universe. ... Over the past 70 years, they have constructed and tested a theory that seems to explain the major properties of the universe: the Big Bang theory. ... This is an important point: The Big Bang theory allows for many different scenarios of the detailed evolution and composition of the universe. ... Because of a theory called nucleosynthesis. ...

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• ASP: Big Clusters, Tiny Galaxies
• ASP: Globular Clusters and Satellite Galaxies: Companions to the Milky Way
• ASP: Using Multicultural Dimensions to Teach Astronomy

Text of these problems is available also in other languages : . ... What can one see in the Moon's sky more often - the Sun or the Earth? ... There are about of 250 millions of stars in the elliptical galaxy M32 (a satellite of Andromeda galaxy). ... The masses of Capella's components. ... You are proposed to estimate the masses of Capella's components, using our observational data. ... A galaxy's mass. ... Estimate the mass of FGC 1908 and compare it to the mass of our galaxy. ...

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• IV International Astronomy Olympiad, Problems to solve
• LPCBC: Abstract 2_11

Maidanak Laboratory is a part of Sternberg Astronomical Institute of Moscow State University. ... Observations are conducted with 1.5 meter RC telescope AZT-22 of Maidanak Observatory (Uzbekistan). rus . ... maidanak lab home page . ... at Sternberg Astronomical Institute . ... 2000). ... Because of technical reasons, we had to use three different CCD cameras in our observations, Pictor-416 camera in 1995, Pictor-416 and TI 800 x 800 cameras in 1997 and 1998, and ST-7 camera in 1999 and 2000. ...

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• Yuri Nicolaevich Efremov - My Home Page
• Division of the Galaxy and Variable Stars

... astro-ph . ... Whitespace-separated words are treated as AND ed. Show 10 50 100 articles per page in Full Compact mode . ... Quasar Variability in the Framework of Poissonian Models . ... It is shown that in this very general framework the well established anti-correlation between variability amplitude and wavelength can only be understood as an effect of an underlying spectral component which remains stable on long time-scales, and is redder than the variable component. ...

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