... 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). ...
НОВОСТИ ФЕДЕРАЦИЯ ЭНЦИКЛОПЕДИЯ ИСТОРИЯ СТАНЦИЯ МИР ENGLISH . ... НОВОСТИ . ... А.Ж. 30.10.2007 / 15:22 Американские астронавты вновь вышли в открытый космос . ... Международный комитет по исследованию космического пространства /МКИКП/ недавно принял решение об учреждении совместно с Академией наук КНР научной премии имени китайского ученого Чжао Цзючжана. ... А.Ж. 30.10.2007 / 10:08 Начались работы по подготовке к запуску израильского космического аппарата AMOS-3 . ... Последние космические новости. ...
... VaST is a software tool for finding variable objects on a series of astronomical images. ... VaST performs object detection and aperture photometry using SExtractor on each image, cross-matches lists of detected stars, performs magnitude calibration with respect to the first (reference) image and constructs a lightcurve for each object. ... VaST FITS image viewer ./pgfv . ... Part I" PZP, vol. ... K. V. Sokolovsky, S. A. Korotkiy; "New Variable Stars Discovered by the NMW Survey" PZP, vol. ...
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. F IGURE . 8. Relations between GC parameters and the horizontal-branch color index. The open circles correspond to the old halo, filled circles to the young halo (large filled circles correspond to clusters with (B-R)/(B+V+R)>0.32 ), and filled triangles to the corona. discussion in the text | privious figure | next figure .
Microsymposium 38, MS085, 2003 (A4 format) REMOTE DETERMINATION OF LUNAR SOIL MATURITY. ... Shevchenko et al. [6, 7], and Pinet et al. [8] developed the method to determine the maturity of lunar soil by using spectropolarimetric ratio Pmax(B)/Pmax(R) for blue (B) and red (R) spectral regions. On the basis of known laboratory results and telescopic data, it was found that ratio Pmax(419nm)/Pmax(641nm) could be used as a remote sensing parameter of lunar soil maturity. ...
JSC History . ... NASA History . ... Search . ... Most of these publications were published by the Government Printing Office as Special Publications in the 4000 - history series. For a listing of all NASA history publications available go to the NASA History Office publications page ( http://history.nasa.gov/publications.html ) . ... Researchers are encouraged to utilize these databases to expedite their research requests and narrow their focus for available materials. ... History Search Index . ...
... supernova images . Supernova Search and . ... How to report a supernova discovery . ... General Supernova information When you are looking for information on the latest Supernovae, the first place to look (Besides the Bright Supernovae page ) is the Recent IAU Circulars page, Recent CBET Circulars and IAU 's List of Recent Supernovae and List of All Supernovae , as well as the Headlines page web page. ... Arcturus Observatory SN images . ... Joseph Brimacombe's supernova images New 2009/12/17 . ...
... The described algorithm is suitable for measurements of complex images of stars. ... a) the zero-based number of stars in the complex (multicentric) image, . b) set of preliminary coordinates - x i , y i , for all stars, index i is number of a star, . ... i - index of a star in the complex image; . ... These parameters are calculated by a nonlinear method of a least squares.The main output parameters of this algorithm are x i , y i ; where the index i is number of a star in the multicentric image. ...
... NASA Main Page . NASA Organizations Index . ... Marshall Space Flight Center . ... Science @ NASA: news . ... Goddard Space Flight Center: Science missions . National Space Science Data Center . data from NASA space flight missions, . ... High Energy Astrophysics Science Research Center (HEASARC) - a source of gamma-ray, X-ray, extreme ultraviolet, other wavebands observations of cosmic (non-solar) sources. ... Kennedy Space Center - Publisher's Photo Corner - Photograph Index . ...
Subject, Object and Problems of Astrophysics. Practical and Theoretical Astrophysics. ... Visual Telescope; Problems Which Are Solved with the Its Help. ... Resolution of Telescopes. ... Effectiveness of Telescope in Respect of Resolution. ... Optical Power of Telescopes for Star-like and Extensive Objects. Boundary Magnitude. Reasons of Light Dissipation in Telescopes. ... Spectral Instruments in Astrophysics. ... Basic Photometrical Ideas, Magnitudes and Their Measurement. ...
... Telescopes . ... But regardless of where you observe from or whether or not you have a telescope, exploring the many aspects of astronomy can be an exciting hobby. It can be an activity shared with thousands of other amateurs all over the world. ... Or it might be pursued more actively by joining a local astronomy club like the Amateur Telescope Makers of Boston and learning by direct association with other amateurs. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...