... The expansion is measured as a number called the Hubble Constant . ... Our value is about 20% lower than the one got with the Hubble Space Telescope in 1994," said Dr Jim Lovell, leader of the team that made the measurement. The Hubble Constant is named after American astronomer Edwin Hubble, who in the 1920s found that other galaxies were moving away from ours. ... The Hubble Constant links the galaxy's distance with its speed." ... A short run-down on the Hubble Constant: . ...

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• ATNF Daily Astronomy Picture
• Coherence in the radio emission
• The giant HII region NGC 3603

... IAU planet classification Observing with a Telescope Large Scale Structure The observables: Local Group (size 1 Mpc) Virgo cluster (size 2+ Mpc) Virgo supercluster (size ~33 Mpc) Voids (size ~ 10-150 Mpc), Walls and sheets, aka filaments (size ~ 50-80+ Mpc) 1 parsec The nearest star is 1.2 parsecs away (Proxima Centuri). ... Virgo supercluster Voids, Sheets Filaments The Virgo Cluster is a cluster of galaxies at a distance of about 18.0 Mpc away in the constellation Virgo. ...

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Bigbang Forum Message . Forums: . ... Big Bang | ... Hubble's Law And The Big Bang . ... Hubble?s Law tell us that the universe is expanding and the farther away an object is, the faster it is moving. ... Please indulge my curiosity and offer me your opinion on these few problems I see with Hubble?s Law and Constant and the Big Bang. ... www.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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• You Can Make Stellar Images Brighter - an Astronomy Net Article
• Moving Objects.. - an Astronomy Net Eyepieces Forum Message
• Moving Experience - an Astronomy Net Domes Forum Message

ABSOLUTE PROPER MOTIONS OF 331 OPEN CLUSTERS . ... The proper motions of stars in the fields of 331 open clusters were taken from Four-Million Star Catalog (4M-catalog) of positions and proper motions (Volchkov et al. ... The absolute proper motions for 21 young open clusters have been derived by comparison of precise relative proper motions of individual stars and their corresponding absolute proper motions. ... Sign of proper motions in RA . ... 0.0001 arcsec/yr . ... rms error in RA proper motion . ...

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Rastorguev А.S. "Astronomical Distances" (Lecture course for postgraduates, 2009-2016) . Part 1. ... Trigonometric parallaxes of stars. Moving clusters distances. ... Photometric distances: general approach. Normal stars as "standard candles". ... Main Sequence fitting or distance scale of star clusters. ... Moving photospheres technique. Cepheid distance scale and P-L relations. RR Lyrae distance scale. ... Globular clusters luminosity function. ...

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• Yuri Nicolaevich Efremov - My Home Page

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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Bright Supernova - Archives On these pages you will find references to Supernovae which have faded into oblivion. ... Finally, in 1999, when I took over the International Supernova Network's Latest Supernovae page I retitled the main page "Latest Supernovae", BUT, it's the "Latest Supernovae" page of the "Bright Supernovae" pages which are also sub-pages of ISN. ... Brightest supernova in 2005 . ... Brightest supernova in 2002 . ... Brightest supernova in 2000 . ... Brightest supernova in 1999 . ...

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• Bright Supernova Bright Supernova
• Supernova 1999gi in NGC 3184
• Supernova 2002bu in NGC 4242

... A faint, dusty rose of the northern sky, emission nebula IC 410 lies about 12,000 light-years away in the constellation Auriga. The cloud of glowing hydrogen gas is over 100 light-years across, sculpted by stellar winds and radiation from embedded open star cluster NGC 1893. ... These "tadpoles" (seen just below center) are regions of denser, cooler gas, and more slowly resist the erosive radiation from the hot stars. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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• Amateur Telescope Makers of Boston ATMoB Observing Awards Program

... 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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• Achievements - Page 4
• MAO NASU :: Topic: The DRAGON globular cluster simulations: a million stars,
• Dept. for Physics of Stars&Galaxies

CL 0016+16 and the Hubble constant M. Birkinshaw 1 Department of Physics 2 , University of Bristol, Tyndall Avenue, Bristol BS8 1TL, U.K. J.P. Hughes 3 Department of Physics & Astronomy, Rutgers University, PO Box 849, Piscataway, NJ 08855­0849, U.S.A. Rich cluster CL 0016+16 lies in a large­scale dynamical structure at redshift 0:55, and has a strong Sunyaev­Zel'dovich effect. ... Finally, a strong Sunyaev­Zel'dovich effect is associated with the cluster. ... ApJ, submitted. ... ApJ, 251, L69. ...

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• http://www.mrao.cam.ac.uk/secure/amiday/talks/AMI_Day_Presentation_hogan.pdf
• Abstract
• Astrophysics Group AMI Science

... Next: Star Finding and Up: Image Restoration and Previous: Multiresolution and Astronomical . ... Design improvements continue to be made in the filter developed using mathematical morphology principles for the Infrared Astronomical Satellite ( IRAS ) images. The purpose of this filter is to eliminate Galactic cirrus emission from extragalactic fields. ... With an appropriate normalization, the filter curve was applied to each pixel in the image to remove the Galactic cirrus. ...

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• Clustering Analysis Algorithms and Their Applications to Digital POSS-II
• GIRA - Two Channel Photometric Restoration
• ADASS 2003 Conference Proceedings

On 19/20 October 1995 we used GRIM II to attempt spectroscopy of the 2.3 micron CO absorption band in stellar clusters. ... Read Noise Our typical backgrounds in 60s were about 100 DN (about 500 e), and so for faint objects our noise is utterly dominated by the read noise of about 110 e. We can think of three ways to improve this situation: integrate longer; reduce the read noise; or implement multiple reads. ... Flats The quartz lamps were too dim for flats. ...

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• Moving the Mirrors
• Spectrographic time budget

... 12 Mar 27 1981 12.5 24mm NGC 1912 M38 Open Cluster 8.0 II 2 r MESSIER MARATHON 2004 SAME MB,VL,100*'S APPROX SAME MAG,WELL PLACED IN 24MM MESSIER MARATHON 1981 CL,B,VL,VRI,IF,STL$S Mar 19 2004 12.5 12mmT4 20mm Mar 02 1984 10 Mar 27 1982 12.5 24mm Mar 27 1981 12.5 24mm Dec 03 1980 12.5 24mm 24mm Oct 29 1980 8 Sep 09 1980 ...

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• http://www.wro.org/neumann/RNGC_by_Constellation-Cep.pdf
• http://www.wro.org/neumann/RNGC_by_Constellation-Aur.pdf
• http://www.wro.org/scodova/RNGC_by_Constellation-Vul.pdf

... How to calibrate the energy scale for higher energies of future gratings? Difficult to find astronomical targets with well defined lines. ... Source Energy Flux keV HZ 43 0.2 Bright Sirius B 0.2 HZ43 /10 RXJ1856 1 Faint Simplicity Var WD WD No No No No Yes Yes Extend Lines Point Point Point 1' Point Point Point No Point Point Yes No Yes Yes Yes Yes Point Point , jet Point Cont Cont Cont Cont Lines Cont Lines Lines Lines ...

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• http://xmm.vilspa.esa.es/external/xmm_sw_cal/icwg/presentations/cal_sources_summary.pdf
• http://xmm.vilspa.esa.es/calibration/documentation/epic_cal_meetings/200904/molendi-ec-ma-09.pdf
• http://xmm.vilspa.esa.es/sas/6.0.0/doc/embadpixfind/ChangeLog

Russian Version ( KOI-8 , Win ) . Institute of Astronomy of the RAS . ... Self-consistent simulation of chemical and dynamical evolution of protostellar clouds . Chemical evolution of galaxies . ... Soon after my birth I was moved (I was not able to move on my own in those times, you know) in Novouljanovsk, small town to the south of Uljanovsk. ... Since that time my life and work is bound to the Institute of Astronomy of the Russian Academy of Sciences. ... Back to the INASAN home page . ...

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• On current distance scales for open clusters
• Globular Clusters: Self-Enrichment

... The study of the Large-scale structure of the Universe and measurements of the Dark Energy equation of state; The exploration of the growth and cosmological evolution of supermassive Black holes in the Universe. ... In course of the all sky survey SRG will discover about 100 000 galaxy clusters and 3 million AGNs. Galaxy clusters are the largest gravitationally bounded objects in the Universe and are best explored through the study of X-ray emission from the hot intergalactic gas. ... 2016 IKI RAN ...

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• High Energy Astrophysics Department at IKI RAN
• The best images from RTT150
• Second Spectrum-RG/eROSITA Conference

... Future seminars . P a s t seminars . Seminar council . Model of ejection of matter from nonstationary dense stellar clusters and chaotic motion of gravitating shells" . M.V. Barkov (IKI) . ... Motion of two intersecting shells in the case when they do not runaway shows a chaotic behavior. ...

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• Magnetic Reversals and Moving Continents
• Frames of Reference: The Basics
• Planetary Magnetism

... Это первое изображение звезды, отличной от Солнца, полученное космическим телескопом. Звезда, называемая Aльфой Ориона (Бетельгейзе), отмечена крестиком на правом изображении зимнего созвездия Ориона (Охотника). На изображении показана огромная ультрафиолетовая атмосфера звезды с таинственным ярким пятном размером в десять раз большим диаметра Земли и имеющем температуру по-крайней мере на 2000 К больше температуры остальной поверхности звезды. ...

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• Новости науки
• Обзоры препринтов astro-ph
• Силуэт галактики

... The ancient chronical said about the colour rings around the Sun and the Moon, about three suns in the sky, light columns, bright lightning, different "comets" rushing to the Earth, moving among the stars or round the Earth with the sky. All these occurrences may be divided into three categories: one that occur in the near or far space, processes going on in the Earth atmosphere under the influence of cosmic factors and at last the occurrences connected with the Earth atmosphere. ... Rainbow . ...

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... 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 Virtual Observatory