The efficiency of interaction of radiation with a particle and hence its optical properties depend on the particle chemical composition, size, shape, structure, etc. ... Particle size expressed in units of the wavelength of incident radiation, together with chemical composition, most strongly affects the optical properties of a scatterer. ... There are many methods to solve the light-scattering problem for a homogeneous spheroid (our survey of the light-scattering methods see here ). ...

... Over the first 4 years, its X-ray telescopes eROSITA and ART-XC will survey the whole sky with a record sensitivity in the 0.5-10 keV energy band. ... The goal of the second international Spectrum-RG conference is to discuss the different scientific topics addressed by the mission, synergies with surveys at other wavelengths, and requirements to follow-up observations.Contributed talks and poster presentations are invited on the topics related to the SRG science goals. ... Active galactic nuclei . ...

... MILT Description . ... Telescope Control System . ... Biblography The Astrophysical Research Consortium (ARC) consists of astronomers at the following institutions: University of Washington, University of Chicago, New Mexico State University, Princeton University, and Washington State University. ... In addition some advancement in the art and engineering of large telescopes will be pursued. The telescope design itself is one of three major project tasks. ...

... Astrophysics Group . ... MRAO Telescopes . COAST . COAST A Gentle Introduction . ... The limitations of current technology mean that the largest optical telescopes produced today have collecting mirrors up to 10m in diameter. ... The larger the mirror, the further apart these parts can be, and the sharper the resulting image. One of the most amazing developments in optics this century was the realization that not all the pieces of the telescope mirror need be present at the same time! ...

... Moscow, Russia . ... March-October 2000 . ... Gusev A.S. Multicolor CCD Photometry of Six Lenticular and Spiral Galaxies. ... Gusev A.S., Park M.-G. Structure and stellar population of ringed barred galaxy NGC 2336 // Astronomy and Astrophysics, 2003, V.410, P.117-129. ... Gusev A.S. Photometric Properties of Bars in Galaxies // Astronomy Reports, 2000, V.44, N9, P.579-591. ... Gusev A.S. BVRI CCD Photometry of Pecular Galaxies NGC 5605 and NGC 5665 // Astronomy Reports, 2000, V.44, N9, P.569-578. ...

Estimating the NEO Population and Impact Risk: Past, Present and Future . ... Since most of the risk resides in the largest impactors, finding that fraction of the largest bodies, and that none of them has a significant chance of impacting in the next century or so, "retires" more than 90 % of the impact risk, including most of the risk of a globally catastrophic impact event. ... In the mid-size range, from ~150 m to ~1 km, the main risk is from tsunami generated by an ocean impact. ...

... Освоение космоса (Модератор: Chepurny ) > . E-ELT (European Extremely Large Telescope) . ... Благодарностей: 0 . ... 13 Май 2010, 12:14:53 ? Европейский чрезвычайно большой телескоп" (European Extremely Large Telescope - E-ELT) будет построен в горах пустыни Атакама, объявила на днях Европейская южная обсерватория. ... Ответ #1 : 13 Май 2010, 12:29:34 ? ... Цитата: ds40a от 13 Май 2010, 12:29:34 Field of view: 10 arcminute diameter . ... Цитата: ds40a от 13 Май 2010, 13:28:02 И я о том-же. ...

... ASRAS HOME . ... Mees Observatory . ... Site . ... Weather forecast will be correct for the Farash Center . ... Through gracious donations from Marion and Max Farash and the Louis S. Wolk Foundation, ASRAS has been able to acquire a large piece of land well away from the city lights. ... The Marian and Max Farash Center for Observational Astronomy consists of an education center, maintenance building and 6 working observatories on a 17 acre plot of land just off route 64 in the hamlet of Ionia, NY. ...

... Фитнес-браслет Jawbone UP24 Large, Розовый . Jawbone . ... Артикул: CALLAS_PEACOCK_BLUE PETROL Цвет: сине-зеленый Состав: 65% полиэстер, 35% хлопок Особенности: стильный пуловер с длинным рукавом свободного кроя. ... Тип: подвесная, . ... Тип лампы: накаливания, . ... Цвет арматуры: матовый никель, . ... Цвет плафонов и подвесок: белый с рисунком, золото, неокрашенный . Цвет арматуры: золото . Тип поверхности плафонов и подвесок: матовый . Тип поверхности арматуры: глянцевый . ...

In order to measure the density of the Universe, it is necessary to sample a region that is larger than the scale on which the Universe becomes approximately homogeneous. ... When applied to clusters of galaxies we find a mass to luminosity ratio that implies a density of the Universe that is about 0.3 times the critical density. ... Thus the mass-to-muinosity ratio appears to vary with the size of the region measured, from 3 in the solar neighborhood to 30 in galaxies to 300 in clusters of galaxies. ...

Next: Calling Parameters Up: CAL_rgsGetScatter Previous: CAL_rgsGetScatter Contents . ... is the r.m.s. surface roughness for two scatter models; is either small or large for small angle scatter, and large angle scatter, respectively. ... Note that the surface roughness for the large angle scatter is parameterized as a function of wavelength and its value is obtained with . ... The fraction of scattered light for small/large angle scatter is . ... This is not performed by this function. ...

... ON THE ROLE OF LARGE-SCALE PLASMA IRREGULARITIES AT THE FINAL STAGE OF ANOMALOUS ABSOPTION DEVELOPING UNDER HF HEATING OF THE IONOSPHERE . ... Fig. ... With the aid of numerical statistical modeling based on multiple ray tracing it is shown that in presence of large-scale irregularities the reflected signal amplitude mean value is increased significantly. ... Dependence of the mean amplitude of the reflected from the ionosphere signal on the large-scale (10-50 km) electron density irregularity level...

... MASTER Net is 56 square degrees per 1 exposition . ... 06 Dec 2015: GRB 151205B: MASTER-NET early optical observations GCN18665 . ... 18 Nov 2015: GRB 151118A: MASTER-NET optical observations GCN18613 . ... 12 Nov 2015: GRB 151112A: MASTER-NET optical limit GCN18591 . ... 07 Nov 2015: GRB 151107A: MASTER-NET optical observations GCN18565 . ... 31 Oct 2015: Five OTs detected by Global Robotic MASTER Net ATel8232 . ... 02 Oct 2015: GRB 151001B: MASTER-NET early optical observations GCN18380 . ...

M87 Gas Disk and Optical Jet (STSci) . SEDS Messier Catalogue M87 Page (U. Arizona) . Black Hole and Jet in M87 (NASA/GSFC) . ... The large scale radio structure is shown in the 3CRR Atlas . Richard White's Virgo Cluster page has optical and X-ray images of the large-scale environment of M87 . ... HST Observes Distant Radio Galaxies (STScI) . HST Finds a Black Hole in NGC4261 (STScI) . HST finds a Bare Black Hole Pouring out Light in NGC6251 . ... Alan Bridle's Home Page . ...

... General astronomy . ... PHYSICAL CONSTANTS.. ... Nobel Laureates in Physics 1901-2002 . ... Lectures Astronomy-161 "Solar System" (Also it contains info about History of Astronomy) . ... The History of Science . ... College-Level Astronomy Courses - at American, Australian Universities and Colleges . ... Messier: . ... Science . ... Scientific American . ... JOURNAL OF COMPUTATIONAL PHYSICS . ... Scientific Journals . ... American Physical Society Journals: Physical Review, Review of Modern Physics ...

... Forum . ... Recent Topics . ... MAO main . Info . NASA Notices Largest Sunspot in Decades . ... Тема: NASA Notices Largest Sunspot in Decades . www.natureworldnews.com/articles/9831/20...-sunspot-decades.htm . ... Board Categories MAO main - Info - MAO - news - Flame Technical - Technical Support(Forum)(Техподдержка(Форум)) . ... Powered by Kunena Forum . ... MAO NASU . ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... les plus belles images de l'Univers d†йcrypt†йes pour vous . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil Ils photographient le ciel au Very Large Telescope . ... Astronomes ou ing†йnieurs, ils profitent de travailler sous le meilleur ciel du monde pour s'adonner †а leur passion de la photographie. ...

... 2007 . ... Сегодня: 10 апреля 2016 г. Приоткрыть завесу тайны космоса, многомерных измерений и даже условий, возникших после Большого Взрыва поможет самая большая в мире цепочка компьютеров. Large Hadron Collider (LHC) сейчас возводится в центре CERN около Женевы. ... Для его работы потребуется большая мощность, он способен обрабатывать 15 петабайт данных каждый год. ... LHC предполагается запустить к 2007 году. ... Сначала данные хранятся на кассетах в CERN, ярус "0". ...

... Mokhovaya st., 11, Moscow, 103907, Russia. ... Proceedings of the 6th IEEE International Specialist Workshop on Nonlinear Dynamics of Electronic Systems, Budapest, Hungary, 16-18 July, 1998 , pp. ... The method for synchronization of drive-response systems on conditions of a large mismatch of parameters is considered on example of the system based on modified Chua's circuit. The approach to information transmission using such method is proposed. ...

... Contact A Problem of an estimation of accuracy of the asteroid CCD observations . The Minor Planet Center supported by the Interntional Astronomical Union is the main office for keeping observational data of the small Solar System bodies and their investigations. ... At Pulkovo Observatory we are estimating an accuracy of the CCD asteroid observations obtained by amateurs and professional astronomers all over the World using the MPC database. ...