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 Unit Telescopes Overview - This page is outdated, an update is in process.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 Secondary mirror (M2 Unit) - This page is outdated, an update is in process.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 Coating Unit - This page is outdated, an update is in process.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

Astronomy Picture of the Day . Earth at Night . ... 26.11.2000 . ... Credit Copyright: C. Mayhew R. Simmon ( NASA / GSFC ), NOAA / NGDC , DMSP Digital Archive Explanation: This is what the Earth looks like at night. ... Human-made lights highlight particularly developed or populated areas of the Earth's surface, including the seaboards of Europe , the eastern United States , and Japan . ... 1999 2000 . ... Publications with keywords: Earth - light pollution . ... Hurricane Paths on Planet Earth . ...

... Dione's icy surface includes heavily cratered terrain, moderately cratered plains, lightly cratered plains, and whispy material. The heavily cratered terrain has numerous craters greater than 100 kilometers in diameter. ... Much of the heavily cratered terrain is located on the trailing hemisphere , with the less cratered plains area existing on the leading hemisphere . ... Because Dione is relatively small, an impact causing a 35 kilometer (21 mile) crater could have spun the satellite. ...

... Dione's icy surface includes heavily cratered terrain, moderately cratered plains, lightly cratered plains, and whispy material. The heavily cratered terrain has numerous craters greater than 100 kilometers in diameter. ... Much of the heavily cratered terrain is located on the trailing hemisphere , with the less cratered plains area existing on the leading hemisphere . ... Because Dione is relatively small, an impact causing a 35 kilometer (21 mile) crater could have spun the satellite. ...

... 2003 August 18 . Bright Lights, Dark City . ... A large power outage in northeast North America , however, dimmed most city lights and brought unfamiliar celestial wonders to many who looked up. ... Prominent in the above four-image digital montage are two of the few celestial wonders that can be seen even above the usual glare of city light pollution : the Moon and Mars . ... Tomorrow's picture: Mars Approaches . ... About APOD | ... NASA Web Site Statements, Warnings, and Disclaimers . ...

In version 2 of the data reduction, we include frames where there is some visible scattered light, but where the background is still reasonably low (not more than a few times the minimum background). ... Briefly, the scattered light subtraction was done by registering the bright and dark images, subtracting the dark from the bright to remove the source, smoothing to remove any residual sources left over after the subtraction, and subtracting this smoothed sky image from the bright frame. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Solar System . Sun . ... March . ... The extent of the solar eclipse of 3 November€а 2013 at 13:22 UTC as seen from Accra, Ghana. We will see a similar sight.€а (Image credit: Kwabena under Creative Commons Licence) . ... Your viewing location is not important as long as it offers an unobstructed view of the south eastern sky.. ... You can use ?eclipse glasses? to view the Sun, these are made from aluminized Mylar filter material. ...

. The upper level focuses on the scientific work being done . in Arecibo. It includes a description of the main research . areas and a sample of related published . papers. Descriptive panels include: . Neutral Hydrogen . Molecular Line Emission . Pulsars . Continum Radio Astronomy . Planetary Radar . Atmospheric Sciences . SETI Construction of the Arecibo TelescopeTelescope Upgrades . This area also includes a pulsar model, a cloud machine and a light table. photos by: tony acevedo 1997 .

Program "М ariner ": Research of Mars. ... Маriner-8" and "Маriner-9", started in 1971, were put into orbit around of Mars, in order to receive and transmit the information, including photos, during one month, instead of several days. ... Satellites of Mars Phobos and Damos there are less than moon. The nature of satellites of Mars remains not clear, but on photos "Маriner-9" it is possible to assume that either Phobos, or Damos are stone monoliths. ...

... IR-Light Emitters & Detectors . Russian High Technologies . ... Infrared detectors and light emitters are key components that are used for applications including radiometry, guidance, gas analysis, medicine etc. ... Devices are operating in spectral range of 1.0-5.0 um and have high efficiency. ... Light Emitters . ... Spectral response of PRX 27.. ... Applications . ... Among the features there are high speed response, high efficiency, wide temperature range. ... IR-Light Emitters and Detectors | ...

... Title : Dark Eden Filename : darkeden.zip Version : 2.1 Date : November 7, 2000 (11/7/2000) Author : Patrick Martin Email : cimartin@flash.net Description ----------- This is a relatively large-sized villa style level. Credits ------- * ID for Doom, Doom][, Quake, and QuakeII. ... The Marble Hall --------------- This long hall connects the Dark Eden to various areas inside Mr. C's earthly residence. ... Changed pistol .wav. 3/13/1998: version 2.0 * Simplified the dark eden. ...

Albert White (Irish Light Pollution Awareness Campaign), Mark Bailey (Armagh Observatory), Terry Moseley (Irish Astronomical Association) and Leo Enright (Broadcaster and Journalist, and invited Guest Speaker at the Conference) receiving "Recognition of Merit" Awards from the International Dark-Sky Association, in the Market Place, Armagh, 19th September 2009. ... An important objective was to raise public and private awareness of the many adverse impacts of light pollution. ...

... Tiny Tim has been used for generating Hubble Space Telescope ( HST ) point-spread functions (PSFs) for deconvolution, algorithm testing, proposal planning, and optical studies. ... Tiny Tim is a stand-alone program for simulating HST PSFs as viewed with the on-board imaging cameras (WF/PC-1, WFPC2, FOC, COSTAR/FOC). ... The measured aberrations for FOC f/96, WF/PC-1 PC6, WFPC2, and COSTAR/FOC are used by Tiny Tim . ... Figure: FOC f/96 observed and Tiny Tim model PSFs (pre-COSTAR) at 253 nm. ...

Astronomers have uncovered patterns of light that appear to be from the first stars and galaxies that formed in the universe. ... The top panel show's Spitzer's initial infrared view of this patch, including foreground stars and a confusion of fainter galaxies, seen at a wavelength of 4.5 microns. In the lower panel, all of the resolved stars and galaxies have been masked out of the image (grey patches), and the remaining background glow has been smoothed and enhanced. ...

... Astrophysics Group . Graduate Research Opportunities 2016 . Available research projects/areas . ... Astrophysics Admissions Form . ... This includes active participation in the development of new instruments as well as the use of ground and space observatories. ... Further details are available at the following web site: http://www.mrao.cam.ac.uk/research/extragalactic-group-2/ . ... Our research group has a wide range of expertise in the development of receivers for radio astronomy. ...

Villains and Heroes of Lights and Lighting Fixtures . If we are to reduce the effects of light pollution, we must learn about the types, both good and bad, of fixtures used in outdoor lighting. ... In fact, this type of fixture is often chosen for this very reason. ... Although these lamps are not very energy efficient, and they are often found in older, inefficient fixtures that enhance light pollution, they still exist in great abundance in most locations and are still sold by the millions. ...

The coordinates, diameters, altitudes and morphological features of all the craters of Mars exceeding 10 km in diameter, totaling 19 308, are compiled. ... The catalogue is intended for use by investigators of Mars, students, in comparative planetology and in the selection of craters for naming. ... 1 one terrace . 2 many terraces . ... 6 many hills and one ridge . 7 one hill and many ridges . ... 1 one crater . 2 many craters . ... Sample craters of different morphological categories . ...

... Currently, only the Corner and Ratio methods described above operate as required. The Corner method effectively cuts the light curve at some number of sigma above the mean nominal level and the Ratio method compares the count-rate per unit area in the obscured corners of the detector to the same in a FOV annulus within the 8-12 keV band. One future ``method'' may include one that determines a fixed count rate plus some ``delta''. ... This will be the ``delta method''. ...

... Alta E6 Imaging area 1024 x 1024 array, 24 x 24 micron pixels (actual size) 1 MHz 16-bit digitization and 1.4 MHz 12-bit digitization to 24Mbyte camera memory 100bT Ethernet interface: up to 300 kHz throughput TCP/IP or UDP protocols DHCP or fixed IP addressing No plug in cards or external controllers Programmable , intelligent cooling to 50° C below ambient · Astronomy Binning up to 10 Horizontal x ... Pixel Binning Exposure Time Frame Sizes Cooling Dark Current (nom.) ...

... BOM2 and the basic block of solar limbograph including pointing and control systems ? ... Fine tracking platform (FTP) for Sun tracking by the sight axis of the limbograph; . ... Tracking system frequency ? ... Controller of the control system and solar fine tracking of the sight axis of the limbograph; . ... The basic relative construction of the elements and instrumental blocks of the "Astrometria" space experiment is shown on the block diagram of units within the complex of SL-200 solar...