... Telescopes ћ Binoculars ћ Microscopes . Meade Ultra-High Transmission coatings (UHTC ) Group . ... Meade Standard Coatings: The optical surfaces of all Meade telescopes include high-grade optical coatings fully consistent in quality with the precision of the optical surfaces themselves. ... These specialized, and extremely advantageous, coatings are offered here as the Meade Ultra-High Transmission Coatings (UHTC) group, a coatings group available optionally on many Meade telescope models. ...
... разработка теории и методов расчета лучевых дифференциалов первого, второго и третьего порядков в градиентных оптических системах; . ... разработка методов расчета геометрических аберраций второго и третьего порядка осесимметричных оптических систем, содержащих асферические поверхности и градиентные среды типа "псевдоаксикон"; . ... получены формулы для расчета смещения изображения и геометрических аберраций второго порядка в градиентных оптических системах с малыми нарушениями осевой симметрии; . ...
... For reliable estimation of the accuracy of asteroid CCD observations we usually consider from ten or more various NUMBERED MINOR PLANETS (NMPs) observed during several nigths per month (more then 50 positions). ... They can be considered as an indicator of accuracy of the CCD positional observations with given MPC code. ... For any NUMBERED minor planet the (O-C) values must be zero if the errors of observations and the errors of its theory are absent. ...
... The NICMOS data reduction and calibration pipeline employs file formats and software architecture techniques that are new and different from what has been used for previous HST instruments. This paper describes the FITS file format used for NICMOS data, which includes error estimate and data quality arrays for each science image, and describes the approach used to associate multiple observations of a single target. ... This group of five data arrays is called an image set, or ``imset'' for short. ...
Apache's support for content negotiation has been updated to meet the HTTP/1.1 specification. It can choose the best representation of a resource based on the browser-supplied preferences for media type, languages, character set and encoding. ... Content-Language: . ... The reason for setting this language quality factor for variant with no language to a very low value is to allow for a default variant which can be supplied if none of the other variants match the browser's language preferences. ...
... The changes are important to us, since they affect our time reckoning, our climate, and our understanding of the Earth's past. ... The Invariable Plane . ... The current location of the celestial north pole, the ecliptic north pole, and the north pole of the invariable plane in the northern sky. ... The north pole of the invariable plane lies in Draco, its south pole in Mensa. ... The precession of the celestial north pole, viewed from above the north pole and against the background of northern...
Next: Photometric Performance of NICMOS Up: NICMOS Data Calibration and Previous: The STScI NICMOS Calibration . ... Cycle 7 Calibration Plan. ... This document summarizes the goals and status of the various calibration programs that form the basis of the NICMOS Cycle 7 calibration plan. ... This document summarizes the content, goals and status of the Cycle 7 calibration plan for NICMOS and also points to the WEB pages where detailed information on specific topics of interest can be found. ...
... ARTICLE: The Adventurous Search For The Astronomical Unit . ... Kepler himself had suggested to use the rare occasions of Venus transiting (crossing) the solar disk to measure our distance to the planet. ... Due to the orbital inclination of Venus against the ecliptic of 3.5°, a Venus transit is so rare that it happens only at intervals of 121.5 years, 8 years, 105.5 years, 8 years and so on. ... Crabtree witnessing the transit of Venus 1639 . ... Transits of Venus - The Quest for the Solar Parallax...
... Imaging GRIN Rod Lens (HAG's) | Relay Rod Lens (LAG's) | ... The Refractive Index Distributions (RID) in GRIN lens preforms are made by multi-stage optimized ion-exchange diffusion between silicate mineral glasses and salt melts. ... In the LAG lenses - L ow A perture GRIN the nature of the changing of refractive index in glass via ion-exchange lies mainly in molecular volume increase. ... LAG lenses are specially treated to create the dark anti-flick surface coating (Fig.2). ...
... The Magazine . ... Get to Know the Night Sky . ... Cosmic particle accelerators get things going . Cluster has shown that narrow shocks may be vital to kick-starting the acceleration process in exploding stars, young stars, black holes, and whole galaxies. ... For example, the Large Hadron Collider at CERN employs a series of small accelerators to get its particles up to speed before injecting them into the main 17-mile-circumference (27 kilometers) ring for further acceleration. ...
... Comets and Asteroids . ... Earth Satellites . ... Illustration of how NASA could capture an asteroid . ... The meteor was quite small compared to some of the objects out there that could potentially hit the Earth, thus if we understood asteroids it could be potentially life-saving! ... This mission could start as soon as the early 2020s with NASA already simulating an asteroid mission to figure out how astronauts might undertake a spacewalk on it. ... Can NASA lasso an asteroid back to Earth? ...
... 000, 112 (2009) Printed 11 February 2010 A (MN L TEX style file v2.2) Analytical approximations of K -corrections in optical and near-infrared bands I1gor V. Chilingarian1 2 ,2,3 , Anne-Laure Melchior 1,4 and Ivan Yu. ... Received 2010 February 01; in original form 2009 August 14 ABSTRACT To compare photometric properties of galaxies at different redshifts, the fluxes need to be corrected for the changes of effective rest-frame wavelengths of filter bandpasses, called K -corrections. ... Table 1. ...
... European Southern Observatory at Site 2010 Kislovodsk Collaboration University of Lethbridge, Canada R. Querel, D. Naylor, G. Tompkins U. Valparaiso A. ChacСn, O. Cuevas, M. Cure, L. Cortes, M. Caneo, L. Illanes J. ThomasOsip, G. Prieto A. OtАrola, M. SchЖck, T. Travouillon R. Hanuschik, M. Sarazin, C. Guirao, G. Avila, G. Lo Curto, I. Saviane, A. Pizarro, G. Ihle, J. Navarette, A. Smette, D. Rabanus Site 2010 Kislovodsk, Oct 5th, 2010 2 GMT, Las Campanas TMT ESO F. Kerber et al. ...
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... This oral history session is being conducted with Chris Kraft in Houston, Texas, as part of the NACA [National Advisory Committee for Aeronautics] Oral History Project, sponsored by NASA Headquarters History Office. ... As an example, it was obvious that the use of wing sweep was going to be a major part of the future airplanes of that age, and all of that was confidential. ... As you know, the cowling, as an example, was an invention of NACA, and it changed the look of modern airplanes in those...
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