... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

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• Objects in the Sky
• Web Site Updates 2008

... The Hubble Deep Field South was released after much anticipation earlier this month, delivering a unique view of some of the most distant parts of our universe. ... Blasting Off from the Moon . ... How did the astronauts get back from the Moon? ... Brittany, age 7, and D.J., age 12, ponder this question over dinner one evening. ... NGC 253: The Sculptor Galaxy . ... Discovered in 1783 by Caroline Herschel in the constellation of Sculptor, NGC 253 lies only about ten million light-years distant. ...

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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 . ...

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... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. December 7, 1997 . A Distant Cluster of Galaxies . ... Explanation: In this 1994 Hubble Space Telescope photograph , every bright object is a galaxy . ... Photos like this indicate that clusters in the past contained a higher fraction of spirals than do nearby clusters which are usually dominated by elliptical galaxies . ... About APOD > . ...

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• APOD: 2005 December 8 - X-Rays from the Perseus Cluster Core
• APOD: December 6, 1997 - A Quasar Portrait Gallery
• APOD: 2008 September 17 - MACSJ0025: Two Giant Galaxy Clusters Collide

... Science User Portal . ... ESO, the European Southern Observatory . ... ESO's Governing Bodies . ... Travel and Contacts . Travel to ESO Headquarters . ... Survey Telescopes . ... Galaxies . Galaxy Clusters . ... ESO Science Newsletter . ... FORS1 and FORS2 . ... ESO 3.6-metre telescope . ... MPG/ESO 2.2-metre telescope . ... First Objects . ... Produced from a 5-min near-infrared exposure, this image was obtained during the night of First Light of the FORS1 instrument (September 15, 1998). ...

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• What's new in the ESO Web
• FORS1 First Light - Distant cluster of galaxies | ESO Australia
• FORS1 First Light - Distant cluster of galaxies | ESO United States

... Механизмы излучения космических объектов: классика и современность . ... Studies of radiation mechanisms and processes of spectra formation in astrophysical objects are among the fundamental tasks of modern astrophysics. ... On this occasion the Saint-Petersburg State University organizes an international conference Radiation mechanisms of astrophysical objects: classics today , which will be held in St. Petersburg from September, 21 to September, 25, 2015. ... radiative transfer theory, . ...

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• Key dates | Radiation mechanisms of astrophysical objects: classics today
• Scientific rationale | Radiation mechanisms of astrophysical objects: classics

... Armagh Planetarium . ... Universe . ... Posted on October 28, 2013 | ... Continue Reading.. ... 3 Comments New research and findings are coming to light suggesting that that we Earthlings might just all really be descended from Martians instead of€а that fell down to Earth on a [ ] . ... Posted on September 27, 2013 | ... 6 Comments So, last year I compiled a top 10 list of the best Space/Astronomy gifts which you can view by clicking here.€а I was so looking forward to receiving my Sheldon [ ] . ...

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• Orion, mighty hunter of the winter sky | Astronotes
• The Mystery Object of M82 | Astronotes
• - Part 14

... 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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... The routines implemented are CLUSTER which has 8 options for hierarchical clustering and PARTITION which carries out non--hierarchical clustering. ... The former is non--hierarchical clustering or partitioning. The latter is hierarchical clustering. Brief consideration will show that a sequence of n-1 agglomerations are needed to successively merge the two closest objects and/or clusters at each stage, so that we have a set of n (singleton) clusters, n-1 clusters, ..., 2 clusters, 1 cluster. ...

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• Tclet for Cluster Database.
• The Tooltips Object
• Object name

... General information . ... Staff . Research staff . Technical, administrative & librarian staff . ... Staff in alphabetic order . Research . ... Technical reports . Projects . ... General interest seminars . ... IT Services . ... Information . Resources and catalogs . ... Historical highlights . Historical research . Historical archive . ... Projects and events . Online resources . ...

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• Precedenti
• APOD: December 13, 1997 - The Coma Cluster of Galaxies
• New Moons of Uranus

... We have simulated the observations of a very distant cluster of galaxies at high redshift. ... The simulations are made for the HST instruments FOC, WFPC II, and the Advanced Camera, and for an 8-m telescope on the ground equipped with adaptive optics. ... A comparison of the fields of view of post-COSTAR HST imaging instruments with the Advanced Camera (AC) and the ground-based adaptive optics camera (AO) is shown in Fig. 1 superimposed on the noise-free cluster simulation. ...

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• HST this week: 113
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• Phase I Target Naming Conventions

IV International Astronomy Olympiad . ... Text of these problems is available also . ... To solve every problem you may use constants and well-known values you know by heart. ... The apparent diameter of the Moon, as seen from the Earth, is 31'. ... Can you observe a star with magnitude . ... Consider the stars as black bodies. ... Estimate the diameter of a black hole constructed using this patent from a ship with the mass of 5000 tn (1 tn = 1000 kg). ... What stars would you observe this nigth? ...

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• Problems of the 1-st International Astronomy Olympiad
• The 2 nd Asian-Pacific Astronomy Olympiad
• V International Astronomy Olympiad, Problems to solve (in English)

... In one situation, we can use light from quasars to probe the material between us and them because that light may pass through one or more galaxies or gas clouds on its way to us. The gas inside the galaxies or the intergalactic clouds acts then as a filter, absorbing selected wavelengths from the quasar light. ... Light from a quasar must pass through clouds of gas and even faint galaxies -- each leaving its imprint on the light -- before we receive it here on Earth. ... Gravitational lensing . ...

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• ASP: A Good Definition of the Word "Planet": Mission Impossible?
• ASP: Making Your Own Astronomical Camera
• ASP: More About Deep Space Objects and Cosmic Terms

... Articles | ... Forums . ... 230 deg . 49 deg . ... 130 deg . ... More Info . ... 210 deg . ... 168 deg . ... 249 deg . ... 195 deg . ... 271 deg . ... 110 deg . ... 338 deg . ... July 15 . 247 deg . ... 224 deg . ... 340 deg . ... July Phoenicids (PHE) . ... August 10 . 341 deg . ... 339 deg . ... 307 deg . ... 334 deg . ... 335 deg . ... 286 deg . ... 327 deg . ... 262 deg . ... 102 deg . ... 153 deg . ... 117 deg . ... December 2 . ... 123 deg . ... 100 deg . ... www.astronomy.net . ...

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• You Can Make Stellar Images Brighter - an Astronomy Net Article
• Your First Telescope - an Astronomy Net Article
• Summer Triangle - an Astronomy Net Article

... Next: Unsupervised Catalog Classification Up: Object Detection and Previous: Classification of Objects . ... Multi-resolution allows for image analysis in terms of different scales. ... This approach is used for the detection (and subsequent analysis) of globular cluster systems around elliptical galaxies, and for image characterization and object trawling in large image databases. ... The applicability of this approach to object detection in large image collections has been investigated. ...

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• Classification of Objects in the Guide Star Catalog
• Refining the Guide Star Catalog: Plate Evaluations
• Object Detection and Classification

... 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. ...

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• SCORPIO: IFP Gallery
• On the problem of high spectral resolution observations of faint objects
• Laboratory for the Stellar Magnetism Study of SAO of the RAS - Magnetic stars -

... The Pleiades star cluster, also known as the Seven Sisters and Messier 45, is a conspicuous object in the night sky with a prominent place in ancient mythology . ... The stars in the Pleiades are thought to have formed together around 100 million years ago, making them 1/50th the age of our sun, and they lie some 130 parsecs (425 light years ) away. ... Data for these stars are listed in a table below. ... Yes . ... WEBDA Pleiades cluster data . ... M45: The Pleiades Star Cluster (2007 November 18) ...

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• Buying a Star: the Facts
• Jodrell Multi-beam Virgo Survey
• HI Mass Function

... Kopylov, A.I., Kopylova, F.G. "Structure of galaxy groups and clusters and measurement of their masses", . ... Kopylova, F.G., Kopylov, A.I. "Peculiar motions of galaxy clusters and groups in the Hercules and Leo supercluster regions", . ... Kopylova, F.G., Kopylov, A.I. "Analysis of the properties of clusters of galaxies in the region of the Leo supercluster", . ... Kopylova, F.G., Kopylov, A.I. "Analysis of the properties of clusters of galaxies in the region of the Ursa Major supercluster", . ...

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• Events archive
• articles_alex_01
• Workshop 2015

... Tonight's Sky . ... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Moon . ... Observing . ... 50 Weirdest Objects . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Observing springtime deep-sky objects with a large telescope . ... Easy-to-Find Objects in the 2015 Fall Sky . ... If you are already registered on Astronomy.com, please log in below. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

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• The 109 objects in a March globular cluster marathon | Astronomy.com
• The year in astronomy: a deeper look | Astronomy.com
• When using my astronomy software or looking at various books, I notice that not

... According to the International Space Station (ISS) Mission Program and the commitments undertaken by the Russian side under this International Project, at 11 hours 14 minutes 45 seconds Moscow time the launch of Soyuz TMA-16 transport manned space vehicle was performed from Cosmodrome Baikonur. ... Currently, two Russian manned space vehicles Soyuz TMA-14 and Soyuz TMA-15, which arrived in the station on March 28 and May 29, 2009, correspondingly, are operating as part of the ISS. ...

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• S.P. Korolev RSC Energia - International Space Station
• PRESS RELEASE - S.P. KOROLEV ROCKET & SPACE CORPORATION ENERGIA