... 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 Unit Telescopes Overview - This page is outdated, an update is in process.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 Secondary mirror (M2 Unit) - This page is outdated, an update is in process.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 Coating Unit - This page is outdated, an update is in process. ...

... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

Image credit: Michael Nolan, Arecibo Observatory. These radar images of near-Earth asteroid 2001 SN263 were obtained on 2008 Feb 12 and 13. ... Image from Feb 12 . ... First near-Earth triple asteroid discovered by Arecibo Observatory . ... was discovered this week by astronomers at the sensitive radar telescope at Cornell University?s Arecibo Observatory in Puerto Rico. ... For example, Arecibo has discovered more than half of the near-Earth binary asteroid systems discovered since 1999. ...

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 . ...

In order to measure the density of the Universe, it is necessary to sample a region that is larger than the scale on which the Universe becomes approximately homogeneous. ... When applied to clusters of galaxies we find a mass to luminosity ratio that implies a density of the Universe that is about 0.3 times the critical density. ... Thus the mass-to-muinosity ratio appears to vary with the size of the region measured, from 3 in the solar neighborhood to 30 in galaxies to 300 in clusters of galaxies. ...

... Today this year's largest group of sunspots will cross the Sun's central meridian. ... The next day, the number of spots in the group reached five, and the day after, on June 2nd, it was possible to count thirteen sunspots on solar disk, which had been clear prior to this. ... This year's two most powerful active areas, which passed across the solar disk at the beginning of May, 2009, are set to appear in the Sun's eastern sector in two days, on June 6th. ...

Astronomy Picture of the Day . ... NGC 5307: A Symmetric Planetary Nebula . ... This picture taken by the Hubble Space Telescope was released last week. NGC 5307 is an example of a planetary nebula with a spiral shape. ... The layers of the Saturn Nebula give a complex picture of how this planetary nebula was created. The above picture, taken in April 1996 and released last week, allows a better understanding of the mysterious process that transformed a low-mass star into a white dwarf star. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . An artistтАЩs impression of the binary UZ For and planet . ... A team of astronomers, including Dr Gavin Ramsay of the Armagh Observatory, has found evidence that suggests the existence of an extraordinary planetary system. Two giant planets appear to be revolving at some distance around a compact, interacting stellar binary known as UZ For, which comprises two small stars orbiting very closely one about the other. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. February 16, 1999 . The Large and Small of M87 . ... Explanation: The small core of elliptical galaxy M87 appears to be energizing its whole galactic neighborhood. Recent images from the Very Large Array (VLA) of radio telescopes indicate that huge bubbles of hot gas not only exist but are still being created. ... About APOD > . ...

TAKE PICTURES. ... Large Monolithic Mirror LMM Gary Matthews Manager, Image Collection Systems Eastman Kodak Company April 11, 2003 LMM Program Goals TAKE PICTURES. ... Mirror concept builds on successful AMSD segmented core design Mirror constructed of smaller segmented blanks joined before processing 5 LMM TAKE PICTURES. ... Large mirror core Pocket milled demonstration mirror AMSD highly segmented core 14 LMM Subscale Demonstration Mirror Design TAKE PICTURES. ...

SELECT <arithmetic expression> CASE n1 [,n2...] [ <statement>.. ... OTHER [ <statement>.. CSELECT . ... At least one integer must be present for each CASE statement. the integer values may appear in any order in the CASE clause. the CASE clauses need not contain all values in the range 1 to N, where N is the largest integer value used. ... SELECT COLOR+1.0 CASE 1 COLTXT='BLACK' CASE 2 COLTXT='RED' CASE 3 COLTXT='GREEN' CASE 5 COLTXT='BLUE' CASE 8 COLTXT='WHITE' OTHER COLTXT='MIXTURE' CSELECT . ...

... We can help students grasp the significance of Hubble's extremely keen eye, and learn a bit about angles and math in the process, with the following in-class activity. ... Looking through binoculars or telescopes allows us to magnify a small section of the sky. To measure sizes or distances in that small section, astronomers divide a degree into 60 smaller pieces called arcminutes, and further subdivide minutes into 60 smaller sections called arcseconds. ... 30 feet = . ... 36 seconds . ...

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. ...

This photograph shows the Large Magellanic Cloud, a neighbouring galaxy to the Milky Way. ... By studying how their light changes and other properties of these systems, astronomers can measure the distances to eclipsing binaries accurately. A long series of observations of these objects has now led to the most accurate determination so far of the distance to the Large Magellanic Cloud тАФ a crucial step in the determination of distances across the universe. ...

U mbriel ("UM bree el") is the thirteenth of Uranus 's known satellites and the third largest: orbit : 265,980 km from Uranus diameter : 1170 km mass : 1.27e21 kg U mbriel is a character in Alexander Pope 's The Rape of the Lock . ... All of Uranus' large moons are a mixture of about 40-50% water ice with the rest rock, a somewhat larger fraction of rock than Saturn 's large moons such as Rhea . ... It has far more and larger craters than do Ariel and Titania . ... Uranus .. Ariel .. ...

Titan . ... Hubble Space Telescope Images of Titan's surface . ... Later that year, it will release the European-built Huygens probe for a descent through Titan's atmosphere. ... This artist's rendering shows the European Space Agency's Huygens probe descending into the atmosphere of Saturn's moon Titan after being released by NASA's Cassini spacecraft. ... This artist's rendering shows the Huygens probe on the surface of Saturn's moon Titan after being released by NASA's Cassini spacecraft. ...

Jean Ballet, CEA/SAp 01 February 2005 Column rejection in the MOS The core of soft sources is removed by the standard emchain. Due to very large fluctuations in count rate from one column to the next at low energy. ... New columns with very bad (too low) energy were discovered in 1E 0102. ... 0831_0125911901, MOS 1, CCD 1, GD 153 (SW mode) Standpixeas alotsrs moved Bad ard l n n y ie The columns running through the source core are rejected by embadpixfind 1.20 in SAS 6.1. ...

. Fig. The SOHO/EIT 171 image (a) illustrating a pronounced transequatorial inverted V-shaped chain 1-2-3-4 which appears to outline the large soft X-ray CH observed with the Yohkoh/SXT (b) on March 1-2, 1999. The BBSO H-alpha (c) and MLSO/HAO He I 10830 (d) heliograms are shown to demonstrate relation of this and some other EUV chains to other large-scale structures such as H-alpha filaments and He I 10830 features. Back to paper .

... Mokhovaya st., 11, Moscow, 103907, Russia. ... Proceedings of the 6th IEEE International Specialist Workshop on Nonlinear Dynamics of Electronic Systems, Budapest, Hungary, 16-18 July, 1998 , pp. ... The method for synchronization of drive-response systems on conditions of a large mismatch of parameters is considered on example of the system based on modified Chua's circuit. The approach to information transmission using such method is proposed. ...

Next: *imcopy* - Compress an Up: Image Manipulation Previous: Image Manipulation . input file: rp90_a.imh . ... xr> images # need this package im> imcopy rp90_a[200:263,282:345] rp90_aa # extract 64x64 region from .imh file rp90_a[200:263,282:345]-->rp90_aa . ... As an example we make an input file for the smoothing task which needs small arrays or it takes too long to run. im> imcopy xdata$rp110590.qp[6830:7029,9290:9489] rp90_ab.imh # extract 200x200 region from the .qp file . ...