Abstract -- Abundances of heavy elements decreases with increasing galactocentric distance almost in all disk galaxies. ... To explain this gradient in young objects and in the interstellar gas one has to assume that a typical disk galaxy is an open system, i.e. it expels some synthesized heavy elements into the circumgalactic space and/or accretes intergalactic gas with zero metallicity, with rates of both processes depending on the galactocentric distance. ...

Программа EOM - "Earth Observation Mission" рассматривалась как возможность повторения части наиболее интересных экспериментов, проведенных в 1983 году во время полета "Spacelab-1". ... А так как первый полет EOM-1 планировался на июнь 1985 года, и времени подготовить новых специалистов по полезной нагрузке было мало, в мае 1984 года было решено назначить в экипаж обоих американских СПН из группы "Spacelab-1". ... Так как полет откладывался, в середине 1985 года было решено отобрать еще двух СПН. ...

... запланированная на 2011 год программа изучения гравитационного поля и внутреннего строения Луны космическими аппаратами. ... Гравитационная карта Луны, сделанная космическим аппаратом Lunar Prospector в 1998-1999 годах . Эта миссия подобна ранее начатому проекту Gravity Recovery and Climate Experiment, изучавшему гравитационное поле Земли. ... 1М (космический аппарат) . ... 2МВ (космический аппарат) . ... Gravity Recovery and Interior Laboratory . ... Союз (космический корабль) . Союз 7К-Л1 . ...

... Up: Data Analysis and Processing Techniques . ... Also, a method for quality control of CCD observations is suggested. ... Everyone who observes a celestial object using a CCD detects moving celestial objects as a ``by product''. ... We hope that our investigations may be useful for near-Earth space control and also for searches of the moving celestial objects through analysis of old and new CCD frames obtained at any amateur or professional astronomical observatory. ...

... 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. ...

Introduction The suggested invention relates to attitude control system of a spacecraft. ... Systems without interaction with ambient (Systems with jet engines) Here, for instance, we can put systems, which can generate torque because of jettisoning any particles or gas. ... The main element of the suggested attitude control system is an electrical motor, which main feature is absents of a stator. ... 3 Block diagram of an attitude control system on a jet engines base. ... It is a system with| | ...

... Geophysics (Journal) . ... Geology of Death Valley (National Park) . Many links for Geophysics (earthquakes) . Geol 456/656 - Composition of the Earth . National Geophysical Data Center . USGS National Earthquake Information Center: Earthquake Information for the World . AGU : AGU Meetings . ... NEIC: Earthquake Search . ... AGU - American Geophysical Union . ... ETH Zurich, Institut fur Geophysik . ... Institut fur Geowissenschaften (Institute of Earth Sciences, Mineralogy Dept.) ...

... Ballistics, navigation and flight control of the spacecraft, going to the L2 point of Sun-Earth system. ... and calculation algorithms have been developed: - an algorithm, building nominal trajectories for one impulse flights to the L2 point of Sun- Earth system, including a Moon swingby maneuver or not. - an algorithm, calculating corrections of spacecraft trajectory needed for the flight from Earth to halo orbit and for stationkeeping of the spacecraft moving in halo ...

... 03.32 AM - the first impulse is performed using the Progress M1-5 eight thrusters to construct the pre-descent orbit. ... maximal distance from earth surface - 219 km . minimal distance from earth surface - 188 km . ... 05.00.24 AM - the second impulse is performed using the Progress M1-5 eight thrusters to construct the pre- descent orbit. ... 08.08 AM - the final third breaking impulse is performed using a combination of the Progress M1-5 main engine and eight thrusters to deorbit Mir OC. ...

Full-Text Search . ... astro-ph . ... SAI VO . Search sort results by Date Relevance . ... Whitespace-separated words are treated as AND ed. Show 10 50 100 articles per page in Full Compact mode . Normalized to: Team, W. 11 article(s) in total . 42 co-authors, from 1 to 6 common article(s). ... Greenbaum, Alexandra Z.. ... Rajan, Abhijith. ... Serio, Andrew W.. Sivaramakrishnan, Anand. Team, HIFI. ... SAI MSU . ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... Ciel Espace, nouvelle formule, c'est . des actualit†йs . ... 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 LтАЩouragan Isaac au clair de Lune . ... Les photos de cyclones ou d' ouragans obtenues depuis l'espace par des satellites sont nombreuses. ...

Initial orbit determinations of NEO-2005 with Pulkovo AMP-method O.P. Bykov Central Astronomical Observatory of RAS, Russia, 196140, Saint-Petersburg, Pulkovskoye shosse 65/1 Abstract Pulkovo Apparent Motion Parameters Method (the AMP-method) was proposed by prof. A.A.Kiselev and developed by his colleagues for initial orbit determinations of Artificial Earth Satellites, Space Debris, Asteroids, and Comets on the base of very short observational arc. ... Table 4 Apparent Motion Parameters for 2005 EE. ...