... December 17, 1999 . Hot Gas In Hydra A . ... Explanation: The Hydra A galaxy cluster is really big. ... But individual galaxies are too cool to be recorded in this false-color Chandra Observatory X-ray image which shows only the 40 million degree gas that permeates the Hydra A cluster. Astronomers have discovered that such X-ray hot gas clouds , millions of light-years across, are common in galaxy clusters . ... Tomorrow's picture: Irregular Galaxy Sextans A . ... About APOD > . ...

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• APOD: 2001 December 10 - Globular Cluster M15
• APOD: 2001 November 3 - Bright Stars, Dim Galaxy
• APOD: 2001 April 16 - The Hydra Cluster of Galaxies

... December 13, 1997 . The Coma Cluster of Galaxies . ... The Coma Cluster of Galaxies pictured is one of the densest clusters known - it contains thousands of galaxies . Each of these galaxies house billions of stars - just as our own Milky Way Galaxy does. ... In fact, the Coma Cluster is so big it takes light millions of years just to go from one side to the other! Most galaxies in Coma and other clusters are ellipticals , while most galaxies outside of clusters are spirals . ...

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• APOD: December 6, 1999 - M83: The Southern Pinwheel Galaxy from VLT
• APOD: December 18, 1999 - Irregular Galaxy Sextans A
• APOD: September 22, 1998 - M61: Virgo Spiral Galaxy

Astronomy Picture of the Day . ... 17.09.2003 . ... Credit Copyright: 2MASS , T. H. Jarrett , J. Carpenter, R. Hurt Explanation: Are the nearest galaxies distributed randomly? ... Many galaxies are gravitationally bound together to form clusters , which themselves are loosely bound into superclusters , which in turn are sometimes seen to align over even larger scale structures. ... Publications with keywords: 2MASS - cluster of galaxies . Publications with words: 2MASS - cluster of galaxies . ...

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• One Million Galaxies
• XWare > APOD
• Астронет > The 2MASS Galaxy Sky

In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

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• The Galaxy Gallery: Messier Objects
• Evidence for Dark Matter
• Astro-2 and the UIT Experiment

... 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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• Catalog of Galaxies behind the Milky Way
• A 1400-MHz Survey of 1478 Abell Clusters of Galaxies
• A VLA Survey of Rich Clusters of Galaxies II

... Galileo was one of the first to study our Milky Way with a telescope in 1610 and he discovered that it was composed of a huge number of faint stars. ... Image Credit: NASA Elliptical Galaxy This image from NASA's Hubble Space Telescope shows a good example of an elliptical galaxy at the centre of a galaxy cluster that is over 450 million light-years away in the direction of the constellation Centaurus. ... Then the Andromeda galaxy was first classed as a galaxy outside of our own Milky Way. ...

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• NGC4666: Secrets of a Starburst Galaxy | Astronotes
• M55 globular cluster seen by ESO | Astronotes
• Kepler 36b and c: Too Close for Comfort | Astronotes

... 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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• Frontier Fields Lensing Models
• December 2011
• VO: Galaxy Morphologies in Clusters

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Australia Telescope 20GHz Survey . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... In addition to this, their morphology displays very spiral like signatures compared to quiescent red sequence galaxies. ...

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• Compact Stellar Systems in the Fornax Cluster: Super-massive Star Clusters or
• ATNF Science Highlights
• Finding the Bivariate Brightness Distribution of galaxies from an HI selected

... 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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• Amateur Astronomers Association of New York ? Amateur Astronomers Association
• Deep Sky Gallery by Ed Fox ? Amateur Astronomers Association of New York
• Astro-Imaging ? Page 6 ? Amateur Astronomers Association of New York

Aitoff Projection showing ChaMP Fields . ... Main survey: >20 from galactic plane. ... Galactic Plane Survey: No subarray fields: reduced area and more complicated processing . ... Short exposures included except NGC galaxies . Galactic Plane Survey: > 30 ksecs . ... Galactic Plane Survey: >10% contamination by a diffuse/distributed X-ray or optical source. ... E(B-V)= (B-V) - (B-V) 0 which translates to visual extinction A V via . ... Crudely, E(B-V) can be related to Galactic latitude via . ...

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• High Energy Astrophysics
• The Chandra Multiwavelength Project (ChaMP) - Science Goals
• Eyes on the Sky, Feet on the Ground: About the Authors

... AGES Precursor Observations · Targeted the M74 ( NGC 628) group · Noise falls as t (to 200s) AGES Precursor Observations · Targeted the M74 ( NGC 628) group · Noise falls as t (to 200s) AGES Precursor Observations · Targeted the M74 ( NGC 628) group · Noise falls as t (to 200s) · Detected 5 galaxies in the group KDG 010 dw0137+1540 UGC 1171 AGES Precursor ...

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• http://www.naic.edu/alfa/ealfa/papers/cortese_iau244.pdf
• Pulsar Highlights - A Dozen new MSPs in Globular Clusters
• VIRGOHI 21

... 2011: . Detection of galaxies with large peculiar velocities . ... New galaxies with polar rings . ... The new catalog contains 275 galaxies. ... Radio galaxy RC J0311+0507, a unique object of the early Universe . ... The estimation of the stellar population age in the host galaxy via the multicolor photometry (BTA) and new infrared data (UKIRT, 2011), amounting to 0.8 Gyr results in the moment of its formation when the universe was about 0.5 milliard years old (z~10). ... Archive . ...

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• Galaxy sector, archive 2014
• Galaxy sector, archive 2012
• Galaxy sector, archive 2009

Astronomy Discussion Forums . Forums: . Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... Discussion Forums . ... Brightest Northern Hemisphere Galaxy . Forum List | ... Post Message | ... In which constellation would I find the brightest galaxy in the northern hemisphere? ... 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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• Education Discussion Forum - Hosted by The Astronomy Net
• Andromeda - an Astronomy Net Education Forum Message

... 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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• Second Spectrum-RG/eROSITA Conference
• Zeldovich-90: COSMOLOGY AND HIGH ENERGY ASTROPHYCIS

I will present theresults from a deep, extended, planetary nebulae survey in a 0.5 sqdeg region centered on the brightest cluster galaxy NGC 4486 (M87) in the Virgo cluster core, carried out with SuprimeCam@Subaru and FLAMES-GIRAFFE@VLT. ... A substructure detected in the projected phase-space of the line-of-sight velocity vs. major axis distance for the M87 halo planetary nebulae provides evidence for the recent accretion event of a satellite galaxy with luminosity twice that of M33. ...

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• http://www.mso.anu.edu.au/seminars/abstracts/20160304-1400.html
• Julie Banfield | Astronomer
• IAU Commission #34 (Interstellar Matter)

home publications > mercury . ... Big Clusters, Tiny Galaxies . ... Astronomers struggle to understand why giant star clusters form in the tiniest of galaxies . ... These clusters are probably young versions of globular clusters, but they are commonly called super star clusters. Seven dwarf galaxies within 16 million light-years have formed super star clusters, with one of these galaxies, NGC 1569, possessing two young clusters. ... Super star clusters have a lot to tell us about star formation. ...

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• ASP: Good Astronomy Activities on the WWW
• ASP: Black Holes to Blackboards: Drifting Through Andromeda
• ASP: Science Fiction Stories with Good Astronomy & Physics

... Ultra-compact dwarf galaxies (UCDs): . ... UCDs are characterised by old stellar populations, are larger, brighter and more massive than the biggest Milky Way globular clusters (GCs), but at the same time significantly more compact than typical dwarf galaxies of comparable luminosity. ... UCDs are remnant nuclei of tidally stripped dwarf galaxies ( Bassino et al. ... UCDs are genuine compact dwarf galaxies formed in the smallest peaks of primordial dark matter fluctuations ( Drinkwater et al. ...

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• Visible light view of a distant galaxy cluster discovered in the XXL survey |
• ESO - Education and Training
• ESO - Studying the Cosmological Evolution of Galaxy Clusters with (Sub-)mm

... НЕПРЕРЫВНОГО МАТЕМАТИЧЕСКОГО ОБРАЗОВАНИЯ . ... Кружок ?Олимпиады и математика? ... Московская математическая олимпиада . Заочный математический конкурс . ... Устные математические олимпиады . Олимпиады по программированию . Математический праздник . Математические регаты . ... Математические бои . Олимпиада по геометрии им. И.Ф.Шарыгина . ... Программа ?Math in Moscow? Научные конкурсы . Творческий конкурс . ... График олимпиад . ... XXVII Математический праздник . ...

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• Moscow Center for Continuous Mathematical Education - Independent University of

... 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 XXL hunt for galaxy clusters | Astronomy.com
• galaxy clusters | Astronomy.com
• Another violent galaxy cluster collision discovered | Astronomy.com

... Moscow, Russia . ... March-October 2000 . ... Gusev A.S. Multicolor CCD Photometry of Six Lenticular and Spiral Galaxies. ... Gusev A.S., Park M.-G. Structure and stellar population of ringed barred galaxy NGC 2336 // Astronomy and Astrophysics, 2003, V.410, P.117-129. ... Gusev A.S. Photometric Properties of Bars in Galaxies // Astronomy Reports, 2000, V.44, N9, P.579-591. ... Gusev A.S. BVRI CCD Photometry of Pecular Galaxies NGC 5605 and NGC 5665 // Astronomy Reports, 2000, V.44, N9, P.569-578. ...

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