... 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...

... What are mechanisms of secular evolution? ... Internal mechanisms of secular evolution may b e: · bar instabilities in dynamically cold disk galaxies , · deviations from circular rotation due to non-axisymmetric gravitation p otential effect which may b e produced by planar structures ... gravitational and energetic, effects of nuclear sup ermassive black holes ­ they may provoke as attraction as well expansion, · certain gas expansion by galactic winds and fountains, etc ...

Neutron Monitors ] [ Solar Neutrons ] [ Muon Telescopes ] [ Base Potchefstroom University ] [ Magnetometers ] [ GPS systems ] [ Ionosphere ] [ Related Data ] [ Space Weather ] . ... All Cosmic Ray Stations + InterPlanetary Data: WorldNet . Alma-AtaB (Mt.Tien Shan) DataBase of Kazakhstan Spectrograph Alma-AtaB (Mt.Tien Shan) new . ... Nagoya Muon Telescope and DATA or mail . ... Belgrade Muon Telescopes and DATA or ">mail . ... Real-Time database for Cosmic Ray Anisotropy (DB10) . ...

Molniya Triplane Aircraft . Molniya-1000 (Heracles) . ... It is intended for carrying large-sized cargo up to 450 tons or passenger modules with capacity up to 1200 persons at the external suspension. It can be used as an aircraft-carrier for aerospace systems. The HERACLES aircraft can be used on non-class as well as the first class airdromes with improved (if necessary) taxi ways. The use of low pressure pneumatics enables the aircraft operation from prepared ground airfields. ...

MAIN PAGE . ... LINKS . ... AAL Members Sites . ... Amateur Astronomy . ... Mars Missions . Observatories Telescopes . ... astronomylinks.com. - astronomy and space links, shortcuts, favorites and bookmarks . ... Mel Bartels' Homepage about Amateur Telescope Making and a lot of interesting links (thx to Hugues Laroche for the link!) ... STEREO (Solar TErrestrial RElations Observatory) consists of two space-based observatories - one ahead of Earth in its orbit, the other trailing behind . ...

This is a progress report on the 2dF QSO Redshift Survey as was presented at the Second Coral Seas Cosmology Meeting on Dunk Island, September 1999. Three talks about the survey were presented at the conference. The others were.... QSO Clustering and Large-Scale Structure , Scott Croom et al . QSO Evolution and the Luminosity Function , B.J. Boyle et al . | << - Meeting Proceedings | Talk Overview - >> | . Robert J. Smith, ">rsmith@mso.anu.edu.au Last modified: Fri Sep 24 11:39:02 EST 1999 .

... A.Tsivilev (Pushchino Radio Astronomy Observatory) "Investigation of Orion A nebula by radio recombination lines". ... T.D.Dorokhova (Astronomical observatory of Odessa national university) «Researches of rapidly oscillating Ap stars». ... N.V.Grabko (Odessa State Ecological University), M.I.Ryabov (Odessa Observatory of IRA NANU) "Space Weather and us: influence of change of a condition of solar and geophysical activity on reaction of various systems of an organism of the person". ...

... The author attempts to approach the problem from the positions of systems analysis with account for the ideological grounds and history of space activities in Russia and abroad, comparing its current interpretation with the initial goals posed by leading theoreticians and practitioners who stood at the cradle of the space exploration era. ... The space systems recognized in Russia as priority projects are largely developed with violations of the systems approach principles. ...

Aurora and Nightglow Laboratory . Head Dr. Valery Alexeyev . Phone: +7(4112) 39-04-60 . Fax: +7(4112) 39-04-50 . ... Dr. Peter Ammosov . Dr. Galina Gavrileva . Dr. Igor Ievenko . ... Dr. Semen Nikolashkin . Electronics engineer Nikolay Alexeyev . Post-graduate Igor Koltovskoy . Post-graduate Stanislav Parnikov . Post-graduate Galina Timofeeva . Post-graduate Semen Titov . ...

. Это изображение полушария Харона, обращенного к Плутону, было получено из анализа кривых блеска системы Плутон-Харон во время затмений Харона Плутоном. Видны полярные шапки и более темные области средних и низких широт. Рядом для сравнения показан Плутон. Кредит: http://pluto.jhuapl.edu/science/everything_pluto/images/5_PLUTOCHA_large.JPG

... Maps of six sources (0420+022, 0420-014, 1308+326, 1345+125, 1803+784, and DA 193) obtained with milliarcsecond resolution are presented and discussed, together with their broadband (1­22 GHz) spectra obtained on the RATAN­600 radio telescope at epochs close to those of the VLBI observations. ... The image (Fig. 5) shows that the source structure at 18 cm is compact, consisting of a VLBI core and two jet components, with the outer component lying 5 mas (30 pc) to the northwest of the core ( = 54 ). ...

... The paper surveys status of the Russian space activity in terms of budget, operati atellistems workforce and industrial capabilities. Shown, that the situation is uneven between the companies and particularly between various tiers of production cooperation. In the current situation international cooperation, both in form of joint non-commercial ventures and integration into global space market, is considered vital for sustenance of the national space capabilities. ... number of R&D programs . ...

Главная Проекты Mars Exploration Rover . ... With far greater mobility than the 1997 Mars Pathfinder rover, these robotic explorers will be able to trek up to 100 meters (about 110 yards) across the surface in a Martian day. ... The rovers will be identical to each other, but will land at different regions of Mars. ... Where Pathfinder had scientific instruments on both the lander and the small Sojourner rover, these larger rovers will carry all their instruments with them. ...