Heavy elements such as the uranium used in generating nuclear power are extremely concentrated sources of energy. ... Space rockets require not just energy, but also mass , matter ejected backwards, of which nuclear fuel provides very little. The limiting factor in the operation of rockets is not a shortage of energy but the high temperature at which they operate. ... One possible loophole remains. ... Test model of "Orion," pro- . ... Next Stop: #32 Far-out Pathways to Space: Solar Sails . ...

THE SUBSYSTEMS OF THE MILKY WAY HALO. ... A catalogue of homogeneous fundamental astrophysical parameters for 145 globular clusters is composed on the base of the data of compilative catalogue by Harris (1997) and from another literature. ... In addition, it has large rotation velocity ( V rot =77?33 km/s), appreciable radial and vertical metallicity gradients equal by value, and has the oldest average age (subsystem of the old halo). ... Characteristic parameter of globular cluster subsystems. ...

The HEAD element has no attributes and the start and end tag can always be safely omitted as they can be readily inferred by the parser. ... The LINK element indicates a relationship between the document and some other object. ... An example of toolbar LINK elements: <LINK REL=Previous HREF=doc31.html> <LINK REL=Next HREF=doc33.html> <LINK REL=Bookmark TITLE="Order Form" HREF=doc56.html> The LINK element can be used with REL=Banner to reference another document to be used as banner for this document. ...

... Most Important Journals . Less Popular Astronomical Journals . Physics . Space, Selectial mechanics, .. Russian Journals . ... Astrophysics & Astronomy . ... Astronomical Journal . ... New Astronomy . ... Publications of the Astronomical Society of the Pacific . ... STScI News . Space Telescope Insitute Newsletter . ... Journal of Astronomical Data . ... Journal of High-Energy Physics (mirror in CERN ) [astro, grav, hi-energy .. ... Journal of Experimental and Theoretical Physics . ...

chandra_acis_ao9.par ; generate an ACIS spectrum for a source using a DEM , ; and optionally rescale the DEM to produce the same ; counts as a ROSAT / PSPC observation ; ;calling sequence ; .run initale ; @chandra_acis_ao9.par ; ;(LL/VK; modified from chandra_acis_ao5.par, Feb04) ;(LL ... density [cm^-3] T_components = [6.9, 7.4] ;log(T[K]) components in the EM EM_components = [5.1d12, 6.1d12] ;Emission Measure [cm^-3] obs_rate = 0.1 ; ROSAT / ...

... Email: chaos@mail.cplire.ru . ... We investigate phenomena on the edge of spatially homogeneous chaotic mode and spatiotemporal chaos in a lattice of chaotic 1-D maps with local connections. We show that spatially homogeneous chaotic mode cannot exist in a lattice with local connections if the Lyapunov exponent of the isolated chaotic map is greater than some critical positive value. We propose a few schemes that make spatial synchronization possible in large lattices. ...

... Tonight's Sky . ... Observing . ... Star Atlas . ... stars . ... Astronomy for Kids . ... The star that should not exist . A team found that the proportion of metals in the star is more than 20,000 times smaller than that of the Sun. ... This ancient star, in the constellation Leo, is called SDSS J102915+172927 and has been found to have the lowest amount of elements heavier than helium of all stars yet studied. ... Only registered members of Astronomy.com are allowed to comment on this article. ...

... Meta Index / Home Page This section documents warnings and errors generated by this task (if any). ... One of the exposure maps was found to contain all zeros. expMapNotFound . ... Can't run asmooth because no exposure map was found. templateImageIsFlat . ... The astest parameter is set: no files will be written. corrective action: The task proceeds in test mode. tooFewObs . ... Note: The task does not at present use the error interface, but uses internal message, warning and error functions. ...

... 1993: . ... Based on the results of spectrophotometric observations with a high signal-to-noise ratio of 15 blue compact galaxies with low abundances of elements heavier than helium, the origin of nitrogen in these objects was investigated. ... Based on the high-accuracy spectrophotometric observations of 10 blue compact galaxies with a low abundance of elements, the most precise value of the mass fraction of helium Y(p) was obtained. ... Archive . ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Medals: National Academy of Sciences (1960); Meteoritical Society (1968); American Association for the Advancement of Science (1972); Royal Astronomical Society (1975); Astronomical Society of the Pacific (1976) . ... Biography: E.J. pik was educated at Tallinn High School and Moscow Imperial University. ... Quarterly Journal Royal Astronomical Society 27 , 508, 1986 . ... E.J. pik in the library at Armagh Observatory 1. ...

... For example, precision of the approximation was calculated for Solar system and 47 Uma star system Kepler orbital elements : Jupiter Saturn 9.537 0.0539 Uranus 19.189 0.0473 Neptune 30.070 0.0086 47 Uma b 2.10 0.032 0.10 3.76 5.83 0.89 47 Uma c 3.60 0 ... rad , rad , rad l, rad 0.0228 1.754 4.801 0.328 0.0434 1.983 5.865 5.591 0.0135 1.291 1.685 2.495 0.0309 2.300 4.636 4.673 Kepler elements for Solar ... Estimation accuracy of disturbing function (h1) expansion is presented. ...

... AstroGrid Registry . ... 6.Edit Properties . ... 4.eXist Ref . ... Here is a more detailed list of each property in the registry. ... reg.amend.authorityid -- The Main Authority ID for this Registry (Authority ID used for the Registry type) . ... By default it is set to use the internal eXist db. ... reg.amend.identify.repositoryName -- Used for the Identify verb in OAI. ... By default ivo_managed set is what is used. Finaly various properties used in the OAI servlet and should not need changing. ...

RADIOASTROPHYSICAL DEPARTMENT • INSTITUTE OF SOLAR-TERRESTRIAL PHYSICS RAS SB . Radio telescope 's beam General information Main characteristics of the Radio telescope Observing programs General view of the antenna array Main research areas Principle of generation of radio images Receiving systems Main characteristics of the base receiving-recording complex Calibrations Data archive and databases Publication SSRT - Radio telescope's beam . ...

... several mechanisms of sound generation by electromagnetic waves, all specific for low temperatures, were disclosed and studied (V.F.Gantmakher and V.T.Dolgopolov; see Sov.Phys.-JETP 30, 78 (1970); . ... it was demonstrated that quantum oscillations of conductivity in bismuth had smaller period near the crystal surface that in the bulk (S.S.Murzin and V.T.Dolgopolov, JETP Lett. 37, 696 (1983); . ... JETP 74, 905 (1992); 76, 714 (1993); 77, 513 (1993); 78, 226 (1994); 82, 951 (1996); JETP Lett. ...

... E.V. Ivanov . ... webmaster@izmiran.ru . ... Ivanov E.V. Two system of large-scale organization of solar activity and their relation to quasi-biennial oscillations and oscillations with a period of 5-6 rotations in the Sun . ... Ivanov E.V. Large-scale organization of solar magnetic fields . ... Ivanov E.V. Large-scale structure of solar magnetic fields, Bulletin of the Russian Academy of Sciences, Physics, 1995, Vol. ... Solar. ... Ivanov E.V., V.N. Obridko, E.V. Nepomnyashchaya, V.N. Kutilina . ...

Amanda Karakas One of the most important research fields in astrophysics is the study of the origin of the elements. ... Asymptotic Giant Blanch (AGB) Stars: For low and intermediate-mass stars (with initial masses between about 0.8 to 8 solar masses) the most important nucleosynthesis occurs when stars evolve off the main sequence to the giant branches. ... This indicates that these stars obtained their unusual abundances via mass transfer from a previous red giant star, that has long evolved away. ...

... Volodymyr Kuzkov, Sergii Kuzkov, Zoran Sodnik - Direct measurements of laser light aberration from the ARTEMIS geostationary satellite through thin clouds // arXiv.org - New resalts to paper at Conference ICSOS-2014, Kobe, Japan, May 7-9 (2014), S4-4, [view pdf file] . ... Kuz'kov V., Volovyk D., Kuzkov S., Sodnik Z., Pukha S. - Realization of Laser Experiments with ESA'S Geostationary Satellite ARTEMIS. ... Preparation to Optical Communication Experiments With ARTEMIS Satellite. ... V.P. Kuz`kov. ...

... Main . ... April 2016 . ... December 2015 . November 2015 . October 2015 . September 2015 . August 2015 . July 2015 . June 2015 . May 2015 . April 2015 . March 2015 . February 2015 . January 2015 . December 2014 . November 2014 . October 2014 . September 2014 . August 2014 . July 2014 . June 2014 . May 2014 . April 2014 . March 2014 . ... December 2013 . ... April 2013 . ... December 2012 . ... April 2012 . ...

MATSYM - symbolic matrix processor . ... To use the program you will need a MAT file (liked CIR file: "User manual for CIRSYM program") of your system. ... In first string of MAT file enter any text you want to be the title of your system. ... Starting from string 2 (if is not comments - "*") enter the system element name, incident row and column and, optionally, its value. ... To generate a solution, run MATSYM.exe and enter "system_file_name.CIR" or click on the "ENTER" (in "MAT" case). ...

... Search Authors: . ... Tokhchukova S., Bogod V., Detection of the long-term microwave "darkening" before the July 14, 2000 flare //Solar Physics, 212/1, pp. ... A.Nindos , C.E. Alissandrakis, G.B. Gelfreikh, V. N. Borovik, A.N. Korzhavin and V.M. Bogod Two-dimensional mapping of the sun with the RATAN-600 // Solar Physics l65: 41 - 59, 1996. ... О. Н. Шиврис Работа радиотелескопа РАТАН-600 с плоским отражателем Изв.САО 1980, 12, с.134-140. ... List of selected publications Bogod V.M . ...