... 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
• Beautiful October Morning skies in Ireland | International Year of Astronomy in
• 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: 2009 October 28 - JKCS041: The Farthest Galaxy Cluster Yet Measured
• APOD: 2001 October 7 - Abell 2218: A Galaxy Cluster Lens
• APOD: 2005 December 8 - X-Rays from the Perseus Cluster Core

... 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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• - Part 14
• Orion, mighty hunter of the winter sky | Astronotes
• Ursa Major | Astronotes

... Science . ... Science Users Information > Science and Technical Meetings > Conferences 2002 > cosmology2002 . ... Observing with ESO Telescopes . ... Public Surveys . ... Data Handling and Products . ... Science Data Products Forum . ... ESO Data . ... ESO Data Access Policy . ... Review: Weak Lensing . ... Tangential alignement of galaxies in a STIS Parallel shear survey field: a new dark lens candidate . ... Poster: . ... New Clues on clustering evolution from the K20 and FIRES surveys . ... data ...

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• A close look at the globular star cluster NGC 6752 | ESO
• Composite of X-ray and visible light views of a distant cluster of galaxies |
• A close look at the young stars in the open star cluster NGC 2547 | ESO

... 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

... Informazioni . Informazioni generali . ... Personale . Personale di Ricerca . Personale tecnico, amministrativo, bibliotecario . Post-doc, assegnisti, collaboratori . ... Visitatori, collaboratori esterni . Personale in ordine alfabetico . ... Ricerca . ... Seminari generali . ... Servizi . ... Norme ricercatori non EU . ... Pagina CONSIP . Vademecum per CONSIP . ... Servizi informatici . ... Informazioni varie . ... Manuali e documentazione . Servizi generali . ...

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

... 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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• Black Holes And RedShift - an Astronomy Net Blackholes Forum Message
• Your First Telescope - an Astronomy Net Article
• Summer Triangle - an Astronomy Net Article

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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• II International Astronomy Olympiad, Problems to solve
• V International Astronomy Olympiad, Problems to solve (in English)
• Problems of the 1-st International Astronomy Olympiad

... 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
• Archive for October
• HST this week: 338

... 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

... 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

... Opening of COSMION - 99 Chair - M.Yu.Khlopov 10.50-11.25. A.Yu.Kamenshchik, I.M.Khalatnikov, A.V.Toporensky "Dynamics of Closed Cosmological Model with a Scalar Field" 11.25-12.00. A.A. Starobinsky "A new life of the Lifshitz-Khalatnikov quasi-isotropic solution" Coffee break Chair - A.A.Starobinsky 12.20-12.55. ... M.Yu.Khlopov "Cosmological Consequence of the Particle Theory: Dark Matter, Antimatter and Mirror Matter in the Universe" Coffee break Chair - Yu.N.Parijsky 12.30-13.10. ...

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... Baikonur launch site, . branch office of S.P.Korolev RSC Energia . At 05:14:37 Moscow Time a space logistics spacecraft Progress M-03M was launched from the Baikonur launch site. The objective of the launch is to provide support needed for further functioning in orbit of the International Space Station (ISS) in accordance with the Russian commitments under the ISS project, as well as to continue developmental testing of the logistic spacecraft of the new series. ...

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

... 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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• On the problem of high spectral resolution observations of faint objects
• GRB follow-up team
• SCORPIO: IFP Gallery

... The Workshop is dedicated to QCD Phase Transitions and observational signals of these Transitions related to formation of compact astrophysical objects. The aim of this workshop is to bring together researchers working on the problems of the behavior and observability of matter under critical conditions achievable in such astrophysical objects as 'strange' or 'hybrid' stars and in laboratories at heavy-ion collisions to discuss fundamental issues and recent developments. ...

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• articles_flera_en
• Events archive
• articles_alex_01

So how do we find objects on the other side of the Universe? ... The latest instruments enable us to scan large areas of sky. Using Cerro Tololo's Blanco 4m telescope and the Canada-France-Hawaii 3.5 metre telescope , we are able to scan a piece of sky larger than the size of the moon every 5 minutes to a faintness level which allows us to find Type Ia supernovae halfway across the Universe. Type Ia supernovae are very rare - but each image we take contains 50000 galaxies. ...

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• GSAOI Latest Developments Page
• Pink Black Holes: Frequently Asked Questions
• Siding Spring Survey

... 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