... Astrophysical Gas Dynamics : Magnetohydrodynamic Waves 1/29 1.2 Perturbations of the MHD equations of motion + v = 0 t 1 (v) + v v = ­ P ­ + ----- B B t 4 B + B v = 0 t B = 0 (1) Astrophysical Gas Dynamics : Magnetohydrodynamic Waves 2/29 In the following we neglect gravity and take for the first order perturbations to a ... We define v w = --k and k n = -k (9) Astrophysical Gas Dynamics: Magnetohydrodynamic Waves 8/29 so that n is a unit vector in the direction of the wave vector...

Observatory, 125, 23­24, 2005 NEGATIVE REPORT OF OCCULTATION BY THE D-TYPE ASTEROID (773) IRMINTRAUD By Apostolos Christou and Mark Bailey Armagh Observatory An unusual negative observation is reported of the predicted occultation of the star HIP 186 by (773) Irmintraud on the morning of 21 July 2004. ... This provides a constraint on the asteroid's position at the time of the event. ... References (1) R. L. Millis, D. W. Dunham, "Precise measurements of asteroid sizes and shapes from occultations". ...

... Куртка-смок, изготовленная на основе оригинальной парки Бундесвера, благодаря своей концепции отличается большей функциональностью. ... материал: 80% хлопок, 20% полиэстер. ... материал: 80% хлопок, 20% полиэстер. size: 7, 9, 8, 11, 13, 14, 10, 12, 15, 6 . title='One Direction. Four - Warner Music' border='0' align='left' width='120' style='margin-right: 20px;' hspace='7' vspace='5'/> One Direction. ... Цвет: синий . ... Материал верха: натуральная кожа . ... Размер NS: 0 . ... Размер: 5 лет . ...

ASTEROIDAL DAMAGE TO THE EARTH: IMPLICATIONS BY ASTEROIDS ­ RUBBLE PILES. ... 13, Moscow 119892, Russia, E-mail:san@sai.msu.ru In the cause of asteroids ­ rubble piles its effective cross-section of collision to the Earth is determined not by consolidated body, but by cluster of its fragments. Since the stage of rubble ­ piles may be ~108 years (see our communication at previous symposium), it may be significant for estimation the asteroidal damage to the Earth. ...

... The Raw Images . Table 1: List of Viking Orbiter Images of the "Face on Mars" . ... Processing the Face Images . ... In July, 1976, Viking Orbiter 1 was acquiring images of the Cydonia region of Mars as part of the search for potential landing sites for Viking Lander 2. ... Using the height field, it is also possible to view the "Face" from different look directions, by mapping the Viking Orbiter image directly on the the topography and then placing the "viewer" at different locations. ... Mars . ...

... The main direction is discrete complex analysis, additional directions are rational classification of embeddings and classification of circular surfaces. I. Discrete complex analysis. ... One of our past results was application of discrete complex analysis to description of all polygons which can be tiled by squares (with Prasolov, 2010). ... The first planned result is convergence of discrete harmonic functions on general lattices to a harmonic function when the lattice becomes finer and finer. ...

. Album : asv-album :: Travels to distant places and countries :: 1998/05 Boston (USA) :: 2 MIT . Up . << Prev . View from the bridge (downtown direction) . Next >> . Powered by album tool a MarginalHack written by David on Tue Jun 23 14:46:40 2015 .

... Primordial theory review : Dick Bond . Defects and the CMB review : Andy Albrecht . ... Gravitational wave contribution to CMB anisotropies : V.B. Lukash and E.V. Mikheeva . C_l from cosmic strings : Lloyd Knox . Some aspects of CMB anisotropies induced from topological defects : Mairi Sakellariadou . ... CMB anisotropies from scaling sources : Ruth Durrer . ... SZ observations I : Sarah Church . ... Holes in the microwave sky? ... Detecting cosmic strings in the CMB : James Robinson . ...

... 1994: . For the first time the abundance of iron is determined in gas components of 10 blue compact galaxies. ... Within the "Big Trio" program (BTA - RATAN-600 - VLA) optical identifications of the first and second subsamples (40 objects) from the RATAN-600 "Cold" survey catalogue of radiosources with steep spectra have been finished at the 6-m BTA telescope. ... The distances to nearby galaxies measured with BTA were used to study the velocity field in the Local system of galaxies. ... Archive . ...

... Spherical aberration, coma, and astigmatism are also easily observed using the star test. ... Off-axis images are complex. ... Fig. ... Diffraction by a circular aperture as a function of defocus for no aberration Airy Disk 1 wave defocus Less than 1 wave defocus Fig. ... Diffraction by a circular aperture as a function of defocus for third-order spherical aberration Paraxial Focus Small distance inside paraxial focus Moderate distance from marginal focus Immediate neighborhood of marginal focus Fig...

... Research of an atmosphere of the Earth and other planets of Solar system by optical methods . ... The long-term experience of study of atmospheres of planets of Solar system in a department of physics of planets has defined directions and methods of researches spent for laboratory . ... The tasks of laboratory are researches by optical methods of structure of a Terrestrial atmosphere, namely study of spectra of absorption of its compound radiation of natural and artificial sources. ...

... Magnetism . ... изучение пространственного распределения региональных аномальных магнитных полей, обусловленных намагниченностью земной коры, с использованием спутниковых измерений . ... В лаборатории создана методика обработки и анализа огромных массивов геомагнитных данных, измеренных на приземных, стратосферных и спутниковых высотах, позволяющая рассматривать магнитное поле литосферы Земли как единое явление во всем околоземном пространстве. ...

... What's New? Bad Astronomy . ... News . ... The questions was: "During a flight, I saw a round rainbow shaped like a doughnut. ... However, she said that all rainbows are actually circles, and that she could not find a name for this phenomenon. ... One is that rainbows really aren't full circles. ... Basically, rainbows are due to light getting bent ("refracted") inside of raindrops. ... It's called a "glory", and is formed in a somewhat different way than rainbows. ... 2008 Phil Plait. ...

... Alexander V. Stepanov, . Dr. Sci. stepanov@gao.spb.ru . Vice-Directors on Science . Yury N. Gnedin, . Dr. Sci. gnedin@gao.spb.ru . ... Cand. Sci. kanaev@gao.spb.ru . ... Dr. Sci. eroshkin@gao.spb.ru . Advisor of the Russian Academy of Sciences . Victor K. Abalakin, . ... Science Secretary . Yury A. Nagovitsyn, . ... Sci. nag@gao.spb.ru . ... Sci. km@gao.spb.ru . Press Secretary . ... Sci. smi@gao.spb.ru . ...

... 6-50, 8-00, 8-40, 9-20, 9-45, 10-05, 10-20, 10-25, 10-38, 11-00, 11-35, 11-50, 11-55, 12-25, 13-00, 13-30, 13-55, 14-15, 14-45, 15-25, 15-35, 16-00, 16-45, 17-15, 17-45, 18-50 . ... Ispravnaya: 6-10, 8-45, 12-00, 13-20, 16-45, 18-30 . ... Nalchik: 6-12, 8-00, 9-29, 11-15, 11-31, 11-50, 12-00, 12-38, 13-00, 13-15, 13-41, 14-50, 15-45, 16-08, 16-35, 17-00, 17-30, 18-30, 18-35, 18-52, 18-55, 19-35, 21-00, 23-00 . ... Vladikavkaz: 9-29, 12-00, 13-00, 14-50, 15-45, 17-30, 18-30, 23-00 . ...

... Laboratory and theoretical modelling of the UV bump on the interstellar extinction curve is a very popular topic in dusty investigations. ... feature is illustrated by Fig. 10 where the profiles were calculated using the model of graphite spheres. Figure 10: Normalized extinction efficiencies for graphite spheres. ... The lower panel shows the summary extinction of two graphite spheres with radii and (from upper panel) taken in equal proportions. ...

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... Although their determination is based on the scattering process model, independent check-ups by rocket experiments have shown their correctness in experimental applications. ... Ionospheric data analysis, especially during strong disturbances, cannot be without some other kinds of diagnostic tools. ... The lack of data has always been a challange in this case. ...

... Russian Foundation for Basic Research , Project number 98-02-17366 . ... A number of experiments proposes the d -type of the wave function, having two directions with positive and two (in orthogonal direction) - with negative sign of the order parameter. ... The effect of the wave function phase is most efficiently revealed in the experiments with Josephson structures, that are used for determination of the dependences on the pulse direction. ... The project goals are: . ...

... Main page News People . ... Master . ... About Space Monitoring Laboratory, scientific directions, instruments, contacts . ... научным результатом работы сети телескопов-роботов МАСТЕР в 2012г. является массовое открытие оптических транзиентов (открыто около 180 новых объектов, по ним опубликовано 85 научных телеграмм ATel, 22 CBET и IAUC), среди них открыты сверхновые звезды типа Ia- и других типов (образование нейтронных звезд и черных дыр и поиск темной энергии), карликовые новые , ...

Bigbang Forum Message . Forums: . ... Big Bang | ... Hubble's Law And The Big Bang . ... Hubble?s Law tell us that the universe is expanding and the farther away an object is, the faster it is moving. ... Please indulge my curiosity and offer me your opinion on these few problems I see with Hubble?s Law and Constant and the Big Bang. ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...