... ESO is building what will be the World's largest optical telescope array, The Very Large Telescope (VLT). The VLT Project organisation is responsible for the design and construction of the Unit Telescopes, including enclosures, optics, adapter-rotators and coating unit. ... Unit Telescopes Overview - This page is outdated, an update is in process. ... Secondary mirror (M2 Unit) - This page is outdated, an update is in process. ... Coating Unit - This page is outdated, an update is in process. ...

... 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 . ...

... 6.09.1996 . ... Credit: The Clementine Project Explanation: What is the largest known impact crater in the Solar System? ... In general, the rocky terrestrial planets and moons are scarred and battered from frequent repeated bombardment by large objects during our Solar System's early years. ... Publications with keywords: impact crater . Publications with words: impact crater . ... 3D Barringer Meteorite Crater . ... Impact! ... Manicouagan Impact Crater on Earth . Barringer Crater on Earth . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. September 6, 1996 . The Largest Impact Crater . Credit: The Clementine Project . Explanation: What is the largest known impact crater in the Solar System? ... In general, the rocky terrestrial planets and moons are scarred and battered from frequent repeated bombardment by large objects during our Solar System's early years. ...

... Tonight's Sky . ... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Moon . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Read Mark BosloughУ?т??т??s blog on the Jupiter impact . ... How often does a large meteroid hit the Moon? Can I see such an impact? ... We think 2-pound rocks likely hit the Moon more than 260 times per year. Get instant access to subscriber content on Astronomy.com! ... Pluto's largest moon may have once had an ocean . ...

T he Siding Spring Survey (SSS) is a Near-Earth Object search program that utilises the 0.5-m Uppsala Schmidt Telescope at Siding Spring Observatory, N.S.W., Australia. ... The mission of the Siding Spring Survey is to contribute to the inventory of near-earth objects (NEOs), or more specifically, the potentially hazardous asteroids (PHAs) and comets (PHOs) that may pose a threat of impact and thus harm to civilization. ... Based on the CSS Mission page . ... Siding Spring Survey Main Page . ...

Estimating the NEO Population and Impact Risk: Past, Present and Future . ... Since most of the risk resides in the largest impactors, finding that fraction of the largest bodies, and that none of them has a significant chance of impacting in the next century or so, "retires" more than 90 % of the impact risk, including most of the risk of a globally catastrophic impact event. ... In the mid-size range, from ~150 m to ~1 km, the main risk is from tsunami generated by an ocean impact. ...

... Bad Astronomy . ... Bitesize Astronomy . ... Bad Astro Store . ... Site Info . ... It is from from Voyager 1 and shows a whopping big impact crater dominating the profile of the moon. Note that Mimas is about 400 kilometers across (about 250 miles). ... The wall around the crater is 5 kilometers high, and that central peak rises 6 kilometers above the surface (many impact craters have a large central peak which is caused by a pressure rebound from the impact). ... 2008 Phil Plait. ...

Ganymede is the largest moon in our solar system, larger even than the planets Pluto and Mercury. ... Ganymede's surface consists of two main types of terrain: old, dark polygonal units, and young, bright valleys and ridges (see figure 11 ). ... In a similar way, hitting a large block of ice with a hammer makes white marks. ... Ganymede as seen by Voyager 2. ... Because Voyager couldn't spot any large impact craters, scientists have concluded that the moon's surface is young. ... Moon . ... Europa . ...

... From the chain visibility point of view, it is very recommended to look at the Javascript movies , especially if the frame rate can be not regulated in your MPEG player. ... The non-CH-associated large-scale chains visible on the SOHO/EIT images at three wavelengths of 171, 195 and 284 as well as on the MLSO/HAO He I 10830 spectroheliogram of December 16, 1997. ... The SOHO/EIT movies at 171 and 195 show the chain dynamics on June 1-3, 1998. ... Javascript movie (230 KB), SOHO/EIT, 171 . ...

Chain of Impact Craters Suggested by Spaceborne Radar Images . ... A team of scientists believes they have discovered a chain of impact craters in the central African country of Chad that suggests ancient Earth may have been hit by a large, fragmented comet or asteroid similar to the Shoemaker-Levy 9 comet that slammed into Jupiter in 1994. ... The Spaceborne Imaging Radar project is managed by the Jet Propulsion Laboratory for NASA's Office of Mission to Planet Earth, Washington, DC. ...

... View from a killer asteroid (W. Hartmann) . Asteroid Ida . ... Asteroids are made of rock and/or iron - much higher strength material, so a larger fraction survives to impact. ... Meteor Crater, Arizona: 1200 m x 70 m : 20 Megatons, D~10 metres? ... We may even have found a piece of the killer asteroid. expected frequency - once per 100 million years . ... Nearer to home, Clearwater Lakes, in Quebec, form a pair of impact craters, 32 km and 22 km in diameter respectively, aged ~290 million years . ...

A team of scientists believes they have discovered a chain of impact craters in the central African country of Chad that suggests ancient Earth may have been hit by a large, fragmented comet or asteroid similar to the Shoemaker-Levy 9 comet that slammed into Jupiter in 1994. The craters were discovered in radar images of the Earth taken by the Spaceborne Imaging Radar C/X-band Synthetic Aperture Radar (SIR-C/X-SAR) that flew on the Space Shuttle Endeavour in April and October of 1994. ...

. ATLAS is a project to image seven square degrees of sky, in two fields (CDF-S and ELAIS-S1), at radio wavelengths, to an rms of about 15 Jy, making it the widest deep radio survey aver attempted. The fields are chosen to cover the Spitzer Wide-Area IR Extragalactic Survey (SWIRE), and the radio images cut through the dust, to trace the cosmic history of AGN and star-forming galaxies. This page last updated by Ray Norris 5-Mar-2007

... About meteorites . ... Meteoritic data . Impact Crater Smerdyachee . ... Based on Smerdyachee's depth, near circularity, and its mounded wall, and analysis by N.A. Fillin of nearby Roshal, Russia, the Estonian scientists Yu.V. Krestlane and K.H. Mella proposed in 1987 that Smerdyachee Lake is a meteorite crater. ... In 2002, the Laboratory of Meteoritics of the Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Sciences explored this mysterious lake. ...

... Previous: Multi-threaded Query Agent and Engine for a Very Large Astronomical Database . ... Dedicated tools have been developed at CDS in order to face the challenge of fast on-line access to very large astronomical catalogues. ... When a query to such a large catalogue is submitted to VizieR , the CDS database of catalogues and tables (Ochsenbein et al. 2000), a dedicated program handles the request, extracts and decodes the matching data, and sends its output back to VizieR. ... 1990, Russel et...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil Plan large sur la Lagune . ... Les zones sombres diss†йmin†йes dans la n†йbuleuse sont des rassemblements de gaz et de poussi†иres, dans lesquels des †йtoiles sont sur le point de na†оtre. ... 07/03/2016 - Gros plan sur le myst†йrieux mont Ahuna sur C†йr†иs . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Moon . ... According to Ron Miller, author of the respected history of spaceship concepts The Dream Machines , the first known appearance of the tale in print was in the 2 October Тљ1909 issue of Scientific American where the hero was named т??Wang Tuт?? ... Naming a crater after Wan Hu т??the legendary Chinese inventorт?? was proposed shortly after the Soviet probe Zond 3 flew past the Moon in July 1965 returning images of the Moon?s western farside. ...

Presented on Tuesday, January 7, 2003 . We construct a detailed longitude-velocity diagram through the actual midplane of the Galactic H I disk. The Galactic midplane definition is based on single-dish sky surveys, and the detailed l-v slice ( Fig. 1 ) is extracted from the Canadian Galactic Plane Survey ( CGPS ; Taylor et al. 2003 ). ... Note: other slices offset from this one were not shown in the AAS poster for lack of space, but they are available here . ...