... A mere 6,000 light-years distant and sailing through the constellation Vela, star cluster RCW 38 is full of powerful stars. ... Planet Venus traced out this S shape in Earth's sky during 2004. ... Comet Machholz in View . ... Now making its closest approach to planet Earth, the comet will pass near the lovely Pleiades star cluster on January 7th and the double star cluster in Perseus on January 27th as Machholz moves relatively quickly through the evening sky. ... The Pleiades Star Cluster . ...

Laboratory of Stellar Physics . ... A study of close binaries with black holes, neutron stars and white dwarfs. ... A study of SS433 - the massive close binary with a black hole in the regime of supercritical accretion . ... A search for intermediate-mass black holes (IMBH). The black holes which are not supermassive black holes observed in quasars, and which were formed not in massive stars. ... A search for new magnetic stars, new CP stars, measurements of magnetic fields in stars . ...

... Orbit | ... Comet Hale-Bopp, designated C/1995 O1 (Hale-Bopp), is named after Alan Hale and Thomas Bopp, two amateur astronomers of Cloudcroft, New Mexico, and Glendale, Arizona, who independently discovered it on the night of 22 July 1995 whilst observing the globular cluster M70, in Sagittarius, which happened to be close on the sky. ... The initial orbit even indicated that Hale-Bopp might pass close to the Earth in 1997. ... Path of Comet Hale-Bopp (from March 1996 to May 1997). ... 1997 . ...

... VLA observations and Tully-Fisher distances of gas-poor spiral galaxies in the Virgo Cluster Region . ... The HI-H2 Pressure Relation In Early-Type Galaxies . ... Tracing evolution of early-type spirals through the neutral hydrogen window . ... An Arecibo HI 21-cm Absorption Survey of Rich Abell Clusters . ... The Arecibo Ultra-Deep Survey . ... Absorption in varying galactic environments seen in HI surveys . ... Early-type galaxies with neutral hydrogen in the Virgo cluster from the ALFALFA survey ...

... 2000 February 20 . The Virgo Cluster of Galaxies . ... Explanation: Pictured are several galaxies of the Virgo Cluster, the closest cluster of galaxies to our Milky Way Galaxy . ... It contains over 100 galaxies of many types - including spirals , ellipticals , and irregular galaxies. The Virgo Cluster is so massive that it is noticeably pulling our Galaxy toward it. ... Notable bright galaxies in the Virgo Cluster include bright Messier objects such as M61 , M87 , M90 , and M100 . ...

... Science . ... Science Users Information > Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Studying the Cosmological Evolution of Galaxy Clusters with (Sub-)mm Observations . ... Data Handling and Products . ... ESO Data . ... Studies of the Planck data set with optical and sub-mm follow-up observations give new insights about the early assembly of the first clusters, and the later evolution of their gas content as well as of their population of star-forming galaxies. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Comets and Asteroids . ... Space Flight . ... Earth Satellites . ... By admin February 19, 2011 Posted in: Comets and Asteroids . ... Since it was launched in 1999, the Stardust spacecraft has travelled about 5.7 billion km (3.5 billion miles) on its odyssey from Earth to comet Wild 2, back to Earth then on to comet Tempel 1. ... Here you will find the latest news and views from the fascinating worlds of astronomy and space exploration. ...

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. ...

... Informazioni . Informazioni generali . Come raggiungere l'Osservatorio . ... Personale . Personale di Ricerca . Personale tecnico, amministrativo, bibliotecario . ... Personale in ordine alfabetico . ... Per le scuole . ... Amici di Arcetri . ... Seminari generali . ... Servizi . ... Norme ricercatori non EU . ... Vademecum per CONSIP . ... Servizi informatici . ... Informazioni varie . ... Manuali e documentazione . Servizi generali . ... Norme e disposizioni . ... Notizie INAF . ...

... Tonight's Sky . ... The Magazine . ... Observing . ... Magazine . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Sky Events . ... Observing springtime deep-sky objects with a large telescope . ... How close does Pluto's orbit come to Neptune? ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine...

Talk . Date of Talk . ... The Cosmic Evolution of Neutral Atomic Hydrogen Gas" . ... Power Point PDF . ... University of Sydney talk . ... Measuring the Gas in Galaxies in the Distant Past" . ... Talk at 'Galaxy Metabolism: Galaxy Evolution Near and Far' conference . ... Neutral Hydrogen Gas in Galaxies at Moderate Redshifts: Current and Future Observations" . ... Neutral Hydrogen Gas in Abell 370, a Galaxy Cluster at z = 0.37" . ... Neutral Hydrogen Gas in Star Forming Galaxies at z=0.24" . ...

Next: Mixing types of E-P-A Up: ``Ecology'' of Magnetic Rotators Previous: Evolutionary Tracks . So far we have considered evolution of a magnetic rotator related to single rotators or those entering binary system with circular orbits. ... Orbital eccentricity necessarily emerges after the first supernova explosion љ and mass expulsion from the binary system. ... Here, we concentrate on the evolutionary consequences of eccentricity. Mixing types of E-P-A binary systems with non-zero orbital . ...

... GOODS unites extremely deep observations from NASA's Great Observatories, Spitzer , Hubble , and Chandra , ESA's Herschel and XMM-Newton , and from the most powerful ground-based facilities, to survey the distant universe to the faintest flux limits across the electromagnetic spectrum. ... The space-based observations are complemented by ground-based imaging and spectroscopy, including extensive commitments of ESO and NOAO observing time. ... 2010-04-10: Deep VLA 1.4 GHz data for GOODS-North . ...

... Current APO Weather . ... Search Site . ... Information for New Users . ... Technical Staff pages . Night Logs and Mailing Lists (maintained by APO) . ... Technical Documents and Database Search . ... Observer's Documentation and Procedures . ... Problem Reporting and APO Technical Documents Database Search . ... APO Drawing/Document Management Procedures . ... APO Technical Documents Database Search . Home Astrophysical Research Consortium . ... Mail Lists (maintained by APO) . ...

Simulating the Evolution of Stellar Clusters ? ... Resonant Exchange (few Myr) 4perturbed: 6000d, e=0.94 4CE + CE - DWD (0.35d) 2.0 MS 0.8 WD 4GR - merger after 10 Gyr M = 1.6 Msun Comparison with Data: Simulation of M67 H 12,000 single stars (KTG1993 IMF: 0.1 - 50 Msun ) H 12,000 binaries (q: uniform, e: thermal, a: flat-log, max 50 au) H Z = 0.02 H Circular orbit at Rgc = 8 kpc H Plummer Sphere in virial equilibrium 4M ~ 18700 Msun 4 Rt = 32 pc 4Trh ~ 200 Myr 4s ~ 3 km/s 4nc ~ 200 ...

... Kazan is also reachable by train from Moscow. ... Balega (SAO, Nizhny Arkhyz) I. Bikmaev ( KFU , Kazan ) A. Cherepashchuk (MSU, Moscow) E. Churazov ( IKI , MPA ) T. De Zeeuw (ESO) W. Forman (Harvard, CfA) M. Gilfanov ( IKI , MPA ) K. Nandra (MPE, Garching) M. Pavlinsky ( IKI ) P. Predehl (MPE, Garching) N. Sakhibullin ( KFU , Kazan ) S. Sazonov ( IKI ), Deputy chair R. Sunyaev ( IKI , MPA ), Chair D. Varshalovich (Ioffe FTI, St. Petersburg) A. Vikhlinin ( ...

... 50.6, THAT GIVES FOR 26 MONTH (2011, FEBRUARY) DEVELOPMENT CURRENT 24 CYCLES OF SOLAR ACTIVITY THE SMOOTHED MONTHLY MEAN SUNSPOT NUMBER W*feb.= ... 101.7 --------------------------------------------------------------------------- Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 29.08 - 04.09.2011, Forecast on 05 - 12.09.2011, Carrington Rotation 2114 (26,45.08.2011) SOLAR SUNSPOT ACTIVITY OF THE SUN OF THE LAST PERIOD KEPT AT THE CONFIDENT AVERAGE LEVEL. ...

Общая Астрономическая Конференция . ... Правила форума . ... Сообщения за день . ... Добро пожаловать на Общая Астрономическая Конференция. ... Форумы общей направленности . Любые вопросы от новичков (просматривают: 17) . ... Общий форум любителей астрономии (просматривают: 7) . ... Новости магазина Starshop.ru . ... Менее астрономические товары (просматривают: 1) . ... Форум исключительно для сообщений об испытаниях астрономической техники. ... Общая Астрономическая Конференция статистика . ...

. 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.

... Telescopes . ... The International Conference "Dark Ages and White Nights (Spectroscopy of the CMB)" (June 20-24, 2016) . ... The International Conference "Stars: from collapse to collapse" (October 3-7, 2016) . The traditional annual competition conference of scientific and scientific-engineering papers of the Observatory staff members . ... A session of the Dissertation Council (October 16, 2015) . ... International scientific conference "Large Optical Telescopes" (October, 10-13, 2011) . ...