Next: Radiopulsars as Sources of Up: Cosmic Rays and Evolution Previous: Cosmic Rays and Evolution . Presently, there is little doubt that galactic CR can be generated at rapidly expanding shock fronts produced by supernova explosions. ... Statistical properties of radiopulsars in our Galaxy indicate a formation rate of NS of about 1 per 10-20 years in the present cosmological epoch, while direct astronomical observations have so far not detected supernova explosions at this high rate. ...

... In less then one day "Mir" station will finish its flight. ... Besides, the operability of motion control systems will be tested to ensure further dynamic operation at the final stage of "Mir" complex. ... The final third burn is given in daily orbit 2 using the "ProgressM1-5" 8 control engines and its main engine with the trust of 300 rg/s. Thus, to peform deorbit maneuver the OC"MIr" real-time tested manuevers involving control engines and their combination with the main engine are used. ...

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Abstract -- Calculations are performed for the circular polarization of maser radiation from a turbulent, Keplerian disk that is intended to represent the sub-parsec disk at the nucleus of the galaxy NGC4258. ... This turbulence, along with the Keplerian velocity gradients and the blending of the three hyperfine components to form the 6 16 --5 32 masing transition of water, are key ingredients in determining the appearance of the polarized spectra that are calculated. ...

... 2. ui , i- , : 5 ui = ( - sin cos i cosi - cos i sini T ), i (1) i ­ i- OYZ; i ­ i- OYZ, i = 225 - 90 i, i = 1,.. ... 6 max ( L1 , L2 ) nmax = min ( L1 , L2 ) ( nmax + 1) , nmax = min ( L1 , L2 ) max ( L1 , L2 ) - min ( L1 , L2 ) - . ... 3) D1min1 , D1min 2 7 mi n1min1 , n2 n1 , min 2 min 2 n1 , n2 , Dlast . ... 11) OX OXY : nxy = nijk - ( nijk , ez ) ez , (12) ex , ey , ez ­ . ... nxy , ex ) ( , ( nxy , ex ) < 0 -arccos nxy (13) OX OXZ : nxz = nijk - ( nijk , ey ) ey . ... 450 B2 (+225 ) B1 (-225 )...

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... NASA Main Page . NASA Organizations Index . ... Marshall Space Flight Center . ... Science @ NASA: news . ... Goddard Space Flight Center: Science missions . National Space Science Data Center . data from NASA space flight missions, . ... High Energy Astrophysics Science Research Center (HEASARC) - a source of gamma-ray, X-ray, extreme ultraviolet, other wavebands observations of cosmic (non-solar) sources. ... Kennedy Space Center - Publisher's Photo Corner - Photograph Index . ...