... A Total Eclipse of the Sun . ... This total solar eclipse was the last visible from the Americas for this millennium. A total solar eclipse is exciting partly because it is so short. Cracks and Ridges on Europa . ... NGC 1818: A Young Globular Cluster . ... Globular clusters once ruled the Milky Way. ... Water Ice At The Lunar Poles . ... Aurora Over Alaska . ... Last December, NASA's spacecraft Galileo swept past the Jovian moon and took photographs which were released yesterday. ...

... February 25, 1999 . NGC 6712: Galactic Globular Cluster . ... Explanation: Following orbits which loop high above the galactic plane , globular star clusters are probably 12 to 14 billion years old - truly ancient denizens of our Milky Way Galaxy. ... One of about 150 globular clusters known to be members of the Milky Way, NGC 6712 is thought to have crossed through the crowded galactic plane only a few million years ago. ... About APOD > . ...

This site provides on-line access to publications, figures, and data tables related to an extensive multi-wavelength observational program to study distant galaxy clusters. ... Lori Lubin, Bev Oke, and Marc Postman have been studying a sample of 9 distant clusters (some taken from the PDCS) using the Keck 10m telescope, the HST, and the KPNO 4m (for IR imaging). ... A Study of Nine High-Redshift Clusters of Galaxies: I. The Survey, . ... A Study of Nine High-Redshift Clusters of Galaxies: II. ...

... December 20-24, 2004, . ... Crisis in cosmology on small scales . ... High-resolution simulations of cluster formation . ... 3 sigma peaks: Observational Signatures of High Redshift Galaxies and Low Redshift Clusters . ... 100% . Higher Dimensional Static Cosmological Model in Lyra Manifold . ... XMM-Newton pilot study of cluster appearence in Sunyaev-Zeldovich sky. ... Acceleration of High-Energy Particles in Cosmological Shocks . ... High Energy Astrophysics Department at IKI , 2004. ...

... Home Astro-Imaging Page 6 . ... AAA Fall Astronomy Class: Astronomy Basics тАУ October-November 2015 . ... This MonthтАЩs Sky тАУ April 2015 . This MonthтАЩs Sky тАУ May 2015 . This MonthтАЩs Sky тАУ June 2015 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning 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 . ...

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. ...

... 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 . ...

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! ...

... Future seminars . ... G.V. Levina (Institute of Continuous Media Mechanics) . ... Abstract . ... The INTEGRAL mission and its first results" . ... Reconnection - new basic results and solar simulations " . October, 30 . ... D.L. Vainchtein (IKI RAN; Dept. of Mechanical and Environmental Engineering, University of California Santa Barbara, USA) . ... New results on Solar Structure and Dynamics and Solar Space Observatories " . ... E.B. Gliner (Theoretial Research Institute, San Francisco) . ...

... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . ... Astronomy for Kids . ... Astronomy 101 . ... Astronomy Foundation . ... Do globular clusters form in a galaxy's halo or migrate in from outside? If the latter, how? ... The Milky Way Galaxy has a system of roughly 150 globular clusters, which are all older than 9 billion years. ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ...

... 21 February 2008 total lunar eclipse photographed by Bob English in Franklin, TN. ... Friday, 22 February 2008 11:16 . International Year of Astronomy, Ireland National Node . ...

... Science . ... Science Users Information > Science and Technical Meetings > Conferences 2012 > Circumstellar Dynamics at High Resolution . ... Observing with ESO Telescopes . ... Data Handling and Products . ... If you are interested in participate in the workshop please fill out the registration form . ... The workshop will take place in Foz do Iguaц§u, Brazil, close to the magnificent Iguaц§u Waterfalls, a network of 275 waterfalls in the Iguaц§u River that lies in the border of Brazil and...

... galaxies: bulges galaxies: clusters: general galaxies: clusters: individual: . ... star formation statistics stellar content structure Cosmology ( cosmology :) cosmic background radiation ( cosmology :) cosmological parameters cosmology : miscellaneous cosmology : observations cosmology : theory ( cosmology :) dark ages, reionization, first stars ( cosmology :) dark energy ( cosmology :) dark matter ( cosmology :) diffuse radiation ( cosmology :) distance scale ( cosmology :) early Universe (...

ECLIPSES, TRANSITS OF MERCURY AND VENUS . Year 1999 . Year 2000 . Year 2001 . Year 2002 . Year 2003 . Year 2004 . Year 2005 . ... Total solar eclipse . ... Transit of Mercury across the solar disk . ... Total lunar eclipse . ... Partial solar eclipse . ... Partial lunar eclipse . ... Annular solar eclipse . ... Penumbral lunar eclipse . ... big map . ... Transit of Venus across the solar disk . ... Annular-total solar eclipse . ... Non-central annular solar eclipse . ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Parkes radio telescope . ... On the Gas Surrounding High Redshift Galaxy Clusters 1 . ... All three QSOs show strong neutral hydrogen absorption at the cluster redshift, suggesting that this cluster (and perhaps all high redshift clusters) may be surrounded by a Mpc scale region containing . ... If most high redshift clusters are surrounded by such regions, we show that the gas must be in the form of many small (< 1 kpc), dense ( . ...

This animation shows a galaxy cluster with two mass concentrations (the pink shading indicates the projected mass density) lensing a background field of faint blue galaxies. ... Inside the Einstein ring radius one has radial arcs, and right in the center of the cluster there are demagnified images. The highest magnifications occur at the Einstein ring radius, giving the large tangential arcs. ... Abell 2218 and CL2244-02 are clusters with tangential arcs. ... Tutorial : Part 1 | Part 2 | ...

... Eclipses of the Moon in 2009 : . In 2009 there are four eclipses of the Moon (tree penumbral eclipses on February 9, July 7, and August 5-6 and a partial eclipse on December 31). ... Moon enters penumbra (P 1 ) . ... Moon leaves penumbra (P 4 ) . ... Eclipse, lunar : . ... It may be total (the Moon passing completely through the Earth's umbra ), partial (the Moon passing partially through the Earth's umbra at maximum eclipse), or penumbral (the Moon passing only through the Earth's penumbra ). ...

. Pulkovo Observatory of Russian Academy of Sciences is situated . near Saint-Petersburg. It was founded in 1839. 196140, Saint-Petersburg, Pulkovskoye chaussee 65/1 . English version . Russian version . This page has been accessed times since May 1, 1999.

A Canadian and American team of Astronomers have used the 305-m wide Arecibo radio dish, the world's largest and most sensitive radio telescope, to uncover a dozen new super-fast-spinning pulsars. The team directed their search for these rare and exotic stars by pointing the Arecibo radio telescope towards massive star clusters, called Globular Clusters, orbiting our Milky Way galaxy. ... One of the most exotic residents in the Globular cluster system are the millisecond pulsars. ...