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 Unit Telescopes Overview - This page is outdated, an update is in process.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 Secondary mirror (M2 Unit) - This page is outdated, an update is in process.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 Coating Unit - This page is outdated, an update is in process.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

June 28, 2010 Wider Bandwidths and a New 12m Antenna will keep . the Arecibo Radiotelescope at the cutting edge of . ... 12m reference antenna Photos by: Tony Acevedo . V ery Long Baseline Interferometry (VLBI) is the technique used to combine signals from radio telescopes separated by distances that can span different continents, or even reach between the Earth and an orbiting . ... Arecibo 305-m telescope is an active participant in both of these forms of VLBI. ...

The VIRGO project is a physics experiment; its aim is the detection of gravitational waves. ... It has not yet been possible to detect directly the gravitational waves: it remains one of the major challenges of experimental physics. ... Interferometric antennas for gravitational waves Gravitational waves distort space-time: along two perpendicular directions, the distances between fixed points will increase (resp. decrease), at the arrival of a gravitational wave. ... Publications from our Group . ...

... 1971), Colla, et al. (1972), and Fanti et al. (1974). 2 name B2 name of source (char8, ex: '0512+24A') 1 cat Part of B2 catalog which contained the source (char4, example : 'B2.1') 3 dec_1950 radians Declination of source in radians (B1950) (real, example : 0.474555) 4 ra_1950 radians Right ascension of source in radians (B1950) (real, example : 5.125028) 5 dec_1950_deg degrees Declination of source in degrees (B1950) (real, ... Example (name) (char8): '0512+24A' . ...

... Flag 1: All those sources with a MASKFRAC column value lower than the value given by parameter mfraclimit will have their first flag set to true, i.e. from 'FFFFFFFFF' to 'TFFFFFFFF'. ... Flag 4: likely spurious extended source in 'circle of influence' of bright point source. This flag will be set if source is extended ( EXT extlimit), has Flag 2 set to true (i.e. is in circle of influence of a bright point source) and the causing source is brighter than counts given by parameter brlimit , i.e.: . ...

... More on 51 Peg: . The discovery of a Jupiter--mass planet in orbit around the solar--type star 51Peg has been reported by Michel Mayor and Didier Queloz (Geneva Observatory) on October 6th at the 9th Cambridge workshop on "cool stars, stellar systems, and the sun" held at Florence (Italy). ... Recall that the measurements of radial velocity only yield v sin i which in turn gives us M sin i. For most values of i, sin i will be greater than 0.5 and this gives a mass estimate of 0.5 Jupiter masses. ...

... The less then 5 degree value of the relative geocentric angular distance between the footprints of the SC is used as a criterion of the magnetic conjugation. ... On the last column of the file is shown the magnetic field model version ( MOD IOPT ) used during magnetic mapping. ... The difference between CMLT values of the Sat.1 and Sat.2 (see as well column 11) . ... dcorlat = dla (deg) . The difference between CORLAT values of the Sat.1 and Sat.2 (see as well column 12) . ... AnD (deg) . ...

Polaris Dust Nebula . ... Explanation: Centered on North Star Polaris , this 4 degree wide field of view covers part of a complex of relatively unfamiliar , diffuse dust clouds soaring high above the plane of our Milky Way Galaxy. The combined light of the Milky Way stars are reflected by the dusty, galactic cirrus , the reflected starlight having the same blue tint characteristic of better known reflection nebulae . ... NASA Web Site Statements, Warnings, and Disclaimers . ...

The antenna element Ravi ATNF, Narrabri 1. ... Miriad works out the radio Parabolic reflector: A parabolic reflector adds all the fields from a surface = aperture at a focal point. ... Feeds are `compact' and `corrugated' horns The inner profile is curved The inner surface has grooves Cross-section of a horn Sub-reflector 28 main-reflector Feed horn O `optical axis' The feed horn adds all the rays that come from the 28 deg. wide sub-reflector. The feed down-weights rays that come off-axis. ...