... An estimate the rotation period of cometary nuclei is important for understanding and describing the physical processes of the cometary activity. Unfortunately, the measurements of the rotation periods of the comet nucleus depend on the model assumptions and it is one of the main reasons for the scatter of the estimates given in various articles for a given comet. ... Right: the image of the comet 29P/Schwassmann-Wachmann 1 obtained at the 6-m telescope. ...

... Be Stars . ... Stellar Winds . ... He had found the first emission line star. ... More emission line stars were found soon, and one had to make subclasses to keep some overview. Cas is a main sequence B-type star, and together with other such stars showing hydrogen emission it forms the class of "Be stars", where the "e" stands for emission. ... Struve further speculated that those stars would be surrounded by a disk, basically thrown off the stellar surface by the rapid rotation. ...

... Abrikosov strings arise in some superconductors when the level of the external magnetic field exceeds a certain critical value. Then the superconductivity starts to break down by forming normal conductivity zones inside the superconductor, looking like strings stretched along the direction of the field. ... Moreover, a reduction of Seiberg--Witten equations to such complex Abrikosov strings can be defined, leading to systems of vortex equations on their normal bundles. ...

... SHTOL ' Special Astrophysical Observatory of the Russian AS, Nizhnij Arkhyz 357147, Russia The investigation of such a phenomenon as the magnetic field variability at long times (years - decennials) is very interesting. If the explanation of the magnetic field variability with rotation period by the oblique rotator model is evident, then the reason of the long-period variability is not clear yet, despite the existence of some assumptions on its nature. ... Fig.2. ... 213 Fig.3. ...

Next: Anatomy of a decline Up: PHYSICAL CHARACTERISTICS Previous: Pulsations . The most obvious and spectacular properties of RCB stars are their dramatic fading events. ... Initial decline is sudden and steep, the star can fade by up to 8 magnitudes in a few weeks. ... This aspect of RCB behaviour represents an area where amateur astronomers consistently make a major contribution - particularly by alerting the research community to the onset of a fading event. ...

. Ce le sti al ca le nd ar . Satellites of Mars . (Orbital, physical and photometric data) . Name . Orbital Period . Semimajor Axis 1 . Mass . Radius . Magnitude 2 . d . ? 10 3 km . 1/Planet . km . m . I Phobos . 0.32 . 9.38 . 1.65 ? 10 -8 . 13.4 ? 11.2 ? 9.2 . 11.4 . II Deimos . 1.26 . 23.46 . 3.71 ? 10 -9 . 7.5 ? 6.1 ? 5.2 . 12.5 . 1 Half the length of the major axis of the ellipse; a standard element used to describe an elliptical orbit. 2 This is the mean opposition magnitude of the satellite.

... part 2 | ... Part 1 . The new concept of formation and development of the Solar system. ... Thus, the initial pulse of the rotation of a protosolar cloud of the solar system was determined as a result of the diversion of a part of the moment of the rotational pulse of the Galaxy. ... Besides this new approach to the pre-solar system as a system of the destroyed vortex structure, we can understand now a number of other peculiarities of the Solar system's structure. ...

... start : uncertain_data . ... SAI VO Projects . ... Help on Wiki search . ... Show page Old revisions . These are the older revisons of the current document. To revert to an old revision, select it from below, click Edit this page and save it. 2011/08/26 15:09 uncertain_data karpov (current) . 2011/08/26 14:57 uncertain_data created karpov . uncertain_data.txt Last modified: 2011/08/26 15:09 by karpov Back to top . SAI VO | ... SAI MSU | ...

... Accurate identification of physical binary star systems has become of increasing interest in recent years. ... Identification of physical binary star systems, with an estimated reliability of such identifications based on the theory of probability, is also important for current and future efforts to find binary star systems that are candidates for observations with the aim of determining their orbits and component masses. ... probability of the proximity of proper motions and ; . ...

... Status of the numerical solutions and validation 2. ... Coupling of "solid" Earth components, e.g. core ­ mantle (Dehant et al.) ... Consistent relativistic formulation of Earth rotation (Gerlach, Klioner, Soffel) Status of the numerical solutions - 2 · The results from numerical solutions suffer from ­ Simplified solid Earth models ­ Incomplete Earth system models or neglecting of certain parts or neglecting of certain coupling mechanisms ­ Methodological limitations of computations...

This book is available from CUP . Geometric algebra is a powerful mathematical language with applications across a range of subjects in physics and engineering. This book is a complete guide to the current state of the subject with early chapters providing a self-contained introduction to geometric algebra. ... Following chapters extend the concept of a complex analytic function theory to arbitrary dimensions, with applications in quantum theory and electromagnetism. ...

Pulkovo Photographic Plate Database . To find a certain plate, type its number, choose instrument and click button FIND Instrument: Normal Astrograph 26-inch refractor Plate number: . To find plates with a certain sky area: choose instrument, type coordinates (R.A. and Dec.) of the center of this area, type radius of this area, type (optionally) names of required objects, and click button FIND . ...

Pulsar - the neutrone star. ... Its physical properties are greatly changed. ... Naturally after the discovery of pulsar connection with the remains of the supernew star outbursts it was supposed that the pulsars and the neutron stars are the same objects. ... In the external layer of a neutron star, where the substance dense is not so great to break the cores; they may from the hard chip structure, which at the pulsar rotation decreasing is broken the starquake. ...

... Информация Руководство и преподаватели Буланова Анджела Владимировна . ... Буланова А.В. Регулирование селективности газохроматографического разделения. ... Шафигулин Р.В. , Мащенко З.Е., Сомова М.В. и др. ... Шафигулин Р.В. , Буланова А.В. Влияние состава и природы элюента на удерживание цефалоспориновых антибиотиков в условиях ВЭЖХ // IV Всероссийский симпозиум с международным участием \"Кинетика и динамика обменных процессов\", 1-8 ноября, Сочи, Россия, М.:\"Граница\", 2015 г., С. 183-183 . ...

Turning the Camera Skyward . A reconfigured camera can take wide-field exposures of astronomical objects (constellations, the Milky Way, zodiacal light, moving artificial satellites, meteor showers, variable stars, etc.) to reveal much fainter objects and structures than seen by naked eye. ... This picture reveals objects more than 2.5 times fainter than can be seen by the naked eye, including not only stars but also the Orion nebula (M42), where new stars are being born. ...

... Of course, the scope of chaos is vast, and we do not dare to cover it all. ... He will highly appreciate your help in compiling the list of URLs to such scientific groups and institutions. http://www.cplire.ru/win/InformChaosLab/ - InformChaos Lab (Moscow) . http://chaos.ssu.runnet.ru/ - Laboratory of Nonlinear Dynamics at Saratov State University (Saratov) . ... http://optics.npi.msu.su/sci/chaos.html - Chaos in laser systems . ... http://www.chaotic.com - Randle, Inc. ... Time: 2-6 July, 2001 . ...

... The output file (in either format) directs the plotting package (gaia or ds9) to draw a circle of a certain radius at a certain sky position. The radius can be made an arbitrary function of column values in the input source table. The task first calculates the value of the column expression in parameter radiusexpression . ... If this is `raw' (the default), the task does no further processing: the result of evaluating radiusexpression is used directly as the radius of the circle to be plotted. ...

... Tonight's Sky . ... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Venus . ... Sky this Month . ... Astronomy for Kids . ... Is the incredibly slow rotation of Venus a result of a geologic cataclysm? ... It appears unlikely that resurfacing, if it occurred, led to the slow rotation rate of Venus, but it certainly may have caused some changes to the speed. ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ...

... Physical Properties of Crystals . ... The course is an introduction into crystal physics and consists of two introductory parts devoted to the basics of crystallography and tensor analysis and six main chapters in which the physical phenomena in anisotropic medium are described by the example of the elastic, electrical and magnetic crystal properties. The effect of symmetry is also discussed. ... Effect of symmetry on crystal properties. ... Effect of symmetry on crystal optical properties. ...

traxy -- Transform an X,Y position from input to output pixel position using the same conventions as drizzle traxy xin yin . xin = 400 [real] . ... The X dimension of the input image (this is used to determine the centre which is the origin of the transformations). (nyin = 800) [real] . ... So, if an object on an input image at a certain position is drizzled with a given set of parameters then the position of that object on the output can be predicted using traxy with the same parameter values. ...