... 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....

ESO PR Photo 18b/00 . ... Caption : Images of two of the novae in NGC 1316 that were discovered during the observational programme described in this Press Release. ... In particular, no less than four novae were detected in a single giant galaxy within only 11 days . ... Moreover, the discovery of four novae in one galaxy in the Fornax cluster was possible with only 3 hours of observing time per filter. ... ESO Press Information is available on the WWW at . http://www.eso.org/outreach/press-rel/ . ...

... AVO First Science Press Release May 28, 2004 . The first major discovery to be made with the Virtual Observatory was announced today to the press. ... ESA's Press Release . ESO's Press Release . ... UVES Investigates the Environment of a Very Remote Galaxy 11 March, 2002 . Observations with ESO's Very Large Telescope (VLT) have enabled an international group of astronomers to study in unprecedented detail the surroundings of a very remote galaxy, almost 12 billion light-years distant. ...

... 2001 October 7 . Abell 2218: A Galaxy Cluster Lens . ... WFPC2 , HST , NASA . Explanation: Gravity can bend light, allowing huge clusters of galaxies to act as telescopes. Almost all of the bright objects in this released Hubble Space Telescope image are galaxies in the cluster known as Abell 2218. ... The cluster of galaxies Abell 2218 is itself about three billion light-years away in the northern constellation Draco . ... About APOD | ... NASA Technical Rep.: ...

M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

CSIRO Ref 98/194 . Astronomers using CSIRO 's Parkes radio telescope have made a picture that shows our Galaxy ripping apart its nearest neighbours. ... The two nearest neighbouring galaxies, the Large and Small Magellanic Clouds (left), are less than a tenth of our Galaxy in size. ... One was a process called ram-pressure stripping - gas being swept out of the Magellanic Clouds as the Clouds travelled through our Galaxy's outskirts." ... Email: hsim@atnf.csiro.au . ...

... Where did these two irregular moons of Uranus originate? Last week two previously undiscovered moons of the distant gas planet were confirmed, the first in irregular orbits. ... M31: The Andromeda Galaxy . ... Andromeda is the nearest major galaxy to our own Milky Way Galaxy. ... When two galaxies collide, however, the stars that compose them usually do not. This is because galaxies are mostly empty space and, however bright, stars only take up only a small amount of that space. ...

... Astrophysics Group . ... Surveys and Catalogues . AMI-Planck . ... The Planck 2013 data release included a catalogue of 1227 galaxy clusters detected via the Sunyaev-Zel?dovich (SZ) effect, the largest SZ-selected cluster catalogue to date. ... This website currently contains results for the 195 clusters with Planck signal-to-noise ratio > 5; results for the remaining clusters in the catalogue with 4.5 тЙд SNR тЙд 5 will be added at a later date. ...

RadioAstron satellite launches Arecibo will participate in observations . Astronomers Create First Four-Continent Telescope (EXPRES Press Releases: science + network ) . ... Arecibo Observatory Astronomers Discover First Near-Earth Triple Asteroid Just 7 Million Miles Away (Press Release) . ... George Mason Student Discovers Galaxy. ... Press Release) . ... Asteroids spin at YORP speed, thanks to the effects of sunlight, Cornell and Belfast astronomers discover (Press Release). ...

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 . ...

... Assignments 4, 5 and 6 all involve the imaginary world of Ziggy. ... Each week, you should write a short executive briefing to Captain Howard, explaining to her what you have learned from that week's data. ... A 500 word limit applies to each briefing you submit. You will submit three briefing papers (due dates below): one for each data release. ... First briefing due (Assignment 4). 2nd data set released. ... Second briefing due (Assignment 5). 3rd and final data set released. ...

Our publications in 2005 year S.A. Pustilnik (SAO), A.Y. Kniazev (ESO, SAO), A.G. Pramskij (SAO) . Astronomy and Astrophysics, Volume 443, Issue 1, November III 2005, pp.91-102 (11/2005) . ... Kniazev, Alexei Y.; Grebel, Eva K.; Pustilnik, Simon A.; Pramskij, A.G.; Zucker, D.B. The Astronomical Journal, Volume 130, Issue 4, pp. ... 10/2005) . Pustilnik, S. A. Astron. ... Kniazev, A.Y.; Pustilnik, S.A.; Grebel, E.K.; Lee, H.; Pramskij, A.G. VizieR On-line Data Catalog: J/ApJS/153/429. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... This shows the Sun, Moon and Earth (not to scale) together with the . ... They have tested the technique on the Earthshine, the light reflected from the Earth by the Moon, and showed that it can reveal the presence of life in our planet. ... This technique uses the fact that the light reflected from the planet is polarised, whereas that emitted by the star is not. ... Polarised light can tell us about the reflecting surface...

... CfA Home . HCO Home . SAO Home . ... Welcome to CfA . CfA History . ... Laboratory Astrophysics . Extreme Astrophysics . ... 617) 495-7210 . ... 617) 495-7044 . ... 617) 495-7265 . ... HEA Research . ... HEA Home Page . CFA/HEA Home Page . ... High Energy Astrophysics Division (HEAD) . Chandra X-ray Center . ... Chandra Cluster Cosmology Project . Chandra Multiwavelength Project (ChaMP) . ... Chandra-Planck Clusters Project . ... CfA Virtual Observatory Project . ...

... Tonight's Sky . ... The Magazine . News . Observing . ... Magazine . ... Press Room . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Press Releases . ... Astronomy magazine editors are here to help enrich media and blogger coverage of meteor showers, space missions, and night-sky events. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

... The search for distant objects which can be both galaxies and quasars is one of the most important problems of observational astrphysics, because it allows one to determine cosmological parameters connected with the time of appearence and evolution of stellar systems, large scale structure of the Universe. ... Radio galaxies are important objects to be studied because they are sources of infrared-optical-ultraviolet continuum, emission lines and continual radio emission. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Stars . ... Space Flight . ... This image of the Tarantula Nebula comprises one of the largest mosaics ever assembled from Hubble photos and includes observations taken by HubbleтАЩs Wide Field Camera 3 and Advanced Camera for Surveys, combined with observations from the European Southern ObservatoryтАЩs MPG/ESO 2.2-metre telescope which trace the location of glowing hydrogen and oxygen. ... Subscribe to Astronotes . ...

... According to the most popular cosmological paradigm, the greater part of the galaxy mass is accumulated in the dark matter halo. ... The polar ring galaxies (PRGs) reveal external rings or disks of gas, dust and stars rotating in a plane roughly perpendicular to the disk of the central galaxy. ... The shape of the dark halo in the model was chosen so as to achieve the best fit to the observed rotation of both galaxies themselves and their polar rings. ... The SPRC-7 galaxy. ...

Astronomical Society of the Pacific Announces its 2011 Award Recipients in Astronomy Research and Education . The Astronomical Society of the Pacific (ASP) today announces the winners of its 2011 awards for excellence in astronomy research and education. ... The Richard H. Emmons Award for excellence in the teaching of college-level introductory astronomy for non-science majors goes to Dr. Douglas Duncan of the University of Colorado and the Fiske Planetarium in Boulder, Colorado. ...

... Galaxy clusters in presence of dark energy: a kinetic approach . ... The external regions of galaxy clusters may be under strong influence of the dark energy, which was discovered by observations of supernovae Ia at redshift z < 1. The presence of the dark energy in the gravitational equilibrium equation, with the Einstein ? ... diagram where equilibrium solutions are not possible. ... Galactic Cluster in the Presence of Dark Energy . ...