... It is assumed that you have available a calculator which can derive sines and cosines, and also has functions sin -1 and cos -1 which given sinA or cosA can find the angle A, in the range 0 to 180 degrees. A triangle ABC has a right angle C and two sharp angles A and B. The triangle's sides AC and BC on both sides of the right angle C are given as: . ... a) When a beam of light hits the surface of a flat piece of glass, it is generally bent by some angle. ... AP cos? = x sin? + y cos a . ...

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... A most promising problem is to investigate the interaction of two VHF powerful radiowave beams in the ionosphere, whose difference frequency is equal to the plasma frequency in some ionospheric area (that is, the difference frequency is taken in the range 1-8 MHz). ... Two-frequency interaction effects are based on radiowave non-linear mixing, which is rather complicated when describing and modelling the experiment. ...

Astronomy Picture of the Day . ... Credit Copyright: Tun Tezel ( TWAN ) Explanation: Is the Sun always straight up at noontime? ... Turning the problem around, however, as in finding where the Sun actually appears to be at high noon , is as easy as waiting for midday, pointing your camera up, and taking a picture. ... Pictured above is one such high noon analemma -- a series of pictures always taken at exactly noontime over the course of a year. ... Publications with keywords: analemma . ...

This method occupies a particular place among the methods of solution of diffraction problems. ... A detailed discussion of the questions connected with the application of the integral equations to light scattering problems can be found in [ 24 , 401 , 464 ]. For solution of the integral equations one uses different methods: method of moments, Galerkin method, etc. 228 , 243 , 265 , 380 , 434 , 467 , 495 , 500 ]. ...

... G. A Leikin, A. N. Sanovich. Sternberg Astronomical Institute, Moscow 119899, Russia. Brown University - Vernadsky Institute Microsymposium 34, October 8-9, 2001, Moscow, Russia . ... G. A. Leikin and A. N. Sanovich, Sternberg State Astronomical Institute, Moscow State University, . ... Brown University - Vernadsky Institute Microsymposium 38, October 27-29, 2003, Moscow, Russia . ... Sternberg State Astronomical Institute, Moscow, State University, 119992, Moscow, Universitetskij prosp. ...

... For many ATMs, having a good ray trace program on hand is pretty valuable. ... http://www.willbell.com . ... It is a slick Windows package with great graphics, but my most recent machine (Win95 OSR2) now encounters many error messages. ... OSLO LT : This is the freeware Windows version of OSLO - it is limited to 12 surfaces, but is otherwise amazing. ... KDP : This is another powerful, freeware Windows raytrace package. ... ZEMAX : This is yet another powerful, Windows raytrace package. ...

... Chapter 1. ... Problems of observational radio cosmology (6) . ... Analysis of radio astronomical data (32) . ... Data analysis system (33) . ... Actuality, goals and results to depend (45) . ... Interactive processing of continuum radio spectra of radio sources (72) . ... Creation of the astrophysical catalogs data base CATS and its application for selection and analysis of radio galaxy samples (112) . ... Data and methods (176) . ... Results of analysis of known radio galaxies data (179) . ...

... This is a photometric data reduction program. Currently it works under MS DOS only! ... Correction of the data for the atmospheric extinction; . ... using special observations of standard stars, and . using comparison stars observations (under some conditions); . ... The distribution includes the manual in LaTeX and DVI format (in Russian only...), examples of data files and the binary. ... All above files are stored is a self-extracting archive file for MS DOS, which you can get right away. ...

... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Problems posed by massive stars . ... These questions were at least part of the motivation when CУЕssio Barbosa of Brazil's University of SУ?o Paulo and Donald Figer of the Space Telescope Science Institute in Baltimore surveyed observers and theorists to see what they believed were the most pressing problems concerning massive stars. ... Get instant access to subscriber content on Astronomy.com! ...

... Bad Astronomy . ... Mad Science . ... How fast must an object be travelling so the sound I perceive as it directly passes me will drop in pitch exactly one octave? ... When an object is moving past another object, any sound emitted by the first object is changed in pitch due to the relative motion. ... wl(emitted)" is the wavelength of sound emitted by the object at rest, "wl(heard)" is the wavelength you hear from the object, "v" is the velocity of the object, and "c" is the speed of sound. ...

AAL Guestbook . Please Sign Our Guestbook . Guestbook Entries: 147 . Add Entry | ... Previous Page | Next Page . ... Wiltz/Luxembourg, . ... Great site !!! i like the design, the pages are very well structured. ... For example for the gallery page it took more than 4 minutes to load. ... Signed on at . ... nice site, well structured. it's worth a bookmark. keep on like this. greetings to lea lucien. r. Signed on at . ... Luxembourg, . ... Current time around the World . ...

RTT150 . ... HEAD IKI . This page is a search interface through RTT150 observationsdatabase which is stored at IKI. According to the agreement between participantsof RTT150 project, observational data fully belong to the institution which hascarried out this observation for one year, are available to all three partiesinvolved (IKI, KSU and TUG) during the second year and become freely accessibleto the whole astronomical community starting two years after observation date. ...

... The dependence of velocity ellipsoid parameters for various types stars upon theirage was investigated. ... For metal-rich stars ([Fe/H] -0.1) the shape of velocity ellipsoid becomes more spherical with increasing age of the stellar group and it approaches the equilibrium shape. ... По данным uvby -фотометрии, изохронным возрастам и собственным движениям ~3500 F -звезд диска в окрестности 80 пс от Солнца исследованы зависимости параметров эллипсоидов скоростей различных звезд от возраста. ...

Copyright ї 1994 by Maxim V. Tarasenko. ... The end of confrontation, associated with the Cold War, led to political feasibility and economic desirability of extended international cooperation in space. ... For example, during the first half of 1994 the Russian Space Agency got only 10 per cent of its annual request. ... Another aspect of an inter-FSU cooperation is what was supposed to be a joint use of results from space activity, both in terms of scientific research and space applications. ...

Альтернативный форум . ... Re: Вопрос математикам - Millennium Problems . x203a; x203a; x203a; в ответ на: Re: Вопрос математикам - Millennium Problems Котофеич . ... Re: Вопрос математикам - Millennium Problems Котофеич, 11.09.2006 16:07 . ... Вопрос математикам - Millennium Problems AlexRAN, 11.09.2006 14:11 . Re: Вопрос о симбиозе математики и физики Anatoly Rykov, 12.09.2006 10:38 . ... Re: Вопрос математикам - Millennium Problems Anatoly Rykov, 11.09.2006 15:34 . ...

Prague, August 16, 2006 . ... We can decide to merge the GCVS with automatic surveys now. I have already outlined the difficulties and will give some examples illustrating the problems slightly later. Steve Kawaler's suggestion: 'The GCVS personnel might play a role as a `meta-catalog' - a central `index' of survey-based catalogs of variable stars'. ... If we want to have a good meta-catalog, the difficulties I have mentioned in relation to merging the catalogues still should be considered. ...

... Dept. for Astrometry & Space Geodynamics . ... Dept. for Physics of Stars&Galaxies . ... Glass Archive . ... We invite you to participate in the 1st International scientific and practical conference, dedicated to the 100th anniversary of astrophysicist I. S. Shklovsky БЂњThe problems of modern astronomy and methodics of its teachingБЂќ . The conference will be held on October, 6б­8, 2016 at Natural sciences education department of Oleksandr Dovzhenko Hlukhiv national pedagogical university. ...

... If you hope that aliens could be somewhere then meet with first Children's Message to Extraterrestrial! ... Message to . ... An idea of contact with unknown life forms unite different specialist like: astronomers, physicists, cyberneticians, radio technicians, linguists, philosophers, and historians. Take a look at page prepared by the SETI Science and Culture Center of the Tsiolkovsky Academy of Cosmonautics and by the SETI Section of the Radio Astronomy Council, Russian Academy of Sciences. ...

Download Izmccd (~2.7 MB). Solution of problems at identification of star field. ... 2) Scale is not correct. ... In this case algorithm of identification will revise all values of scale from twice smaller up to twice greater. ... There should be more than value of the field "Number of stars in frame". ... The star field is considered identified if number of the identified stars more or equally to this value. It is necessary to set value from 4 up to value of field "Number of stars in frame". ...

... 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. ...