... I present results from several seasons of photometric observations of X--ray sources in the Orion OB1a and OB1b star formation regions. The initial goal was to measure the rotational periods of several dozen pre--main sequence (PMS) stars. ... Infrared and optical data confirm that 90% of the X--ray sources are PMS and about 10% of the PMS stars may have disks. ... I find rotation periods for five stars at confidence of greater than 99.9/ greater than 99/ at much lower confidence. ...

... Capability of space means for the solution of problems of military character . ... Classification and functions of space systems of military purpose(assignment) . ... Ground complex of maintenance of launch and control of space vehicles . ... Capability of space systems of optical reconnaissance . ... Complexes topographical and earthresource shooting on base of "Zenit" space vehicle . ... Space vehicle for optical-electronic reconnaissance . ... System with space vehicle on low-altitude orbits . ...

... S.P. KOROLEV ROCKET AND SPACE CORPORATION ENERGIA . ... OAO RSC "Energia" . ... Company's History . ... Brief History of Rocket and Space Technology . ... Flights Chronology . ... Project History . ... Land Launch . ... The structure of the Block DM-SLB used in the Zenit-3SLB launch vehicle in many respects is similar to the Block DM-SL structure of the Sea Launch project and it is its adapted option for the Land Launch Program. ... Contribution of RSC Energia to the Russian Rocket-Space Technology ...

... Catalog . ... This web application is brought to you by the following people (in alphabetical order): . Alexey Sergeev, markup issues . Artemy Tregoubenko , JavaScript code . Elena Glushkova, content management . ... We would like to acknowledge the usage of these open source technologies: . Django , web framework . PostgreSQL , database management system . ... SAMP-Webtools , set of JavaScript tools for SAMP-enabled web applications . Developed by the Team . ...

Databases (NSDC) of the Natural Planetary Satellites. ... NSDC: Database of astrometric observations of Natural Planetary Satellites . ... They are thoroughly looking for observations in different sources, creating their owndatabases which are then mostly inaccessible to other researchers. ... In the file "content" with explications, the reference is given to the data source as well as the bibliographic reference. ... Data sources. ... Why a specific bibliographic database for Natural satellites? ...

CATS home ] [ Back to CATS list ] [ ftp ] . ... See also MRC 1Jy sample I. and MRC 1Jy sample III. Received 1998 February 5; accepted 1998 May 1 0.5 and linear size l ~20 kpc (for H0 = 50 km s-1 Mpc-1; q0 = 0.5). ... SUMMARY * ACKNOWLEDGMENTS * REFERENCES * FIGURES * TABLES * REFERENCES TO THIS ARTICLE FOOTNOTES 1 National Centre for Radio Astrophysics, TIFR, Pune University Campus, Ganeshkhind, Pune-411007, India; vijay@ncra.tifr.res.in, ramana@ncra.tifr.res.in, crs@ncra.tifr.res.in. ...

... Contents . ... Sidereal time . ... Ephemeris of the Sun . ... Rectangular equatorial coordinates of the Sun (J2000.0) . ... Aberration, parallax, mean longitude of the Sun, obliquity of the ecliptic, nutation in obliquity . ... Mean longitude of the Moon, mean elements of the Moon's orbit and equator . ... Ephemeris of Venus . ... Ephemeris for physical observations of the Sun . ... Ephemeris for physical observations of the Moon . ... Conversion of mean time to sidereal time (with accuracy 0.01 s )...

Title: A New Model of the Gravitational Lens 0957+561 and a Limit on the Hubble Constant . Authors: Norman A. Grogin , Ramesh Narayan (Harvard Univ.) ... Title: ROSAT/PSPC observation of the distant cluster CL0939+472 . ... Title: Interaction in the Bimodal Galaxy Cluster A3528 . ... Title: Cosmological Implications of Galaxy Cluster Evolution . ... Title: Galaxy Cluster Virial Masses and Omega . ... Matches 201 to 222 from a total of 222 matches for the search pattern galaxy cluster . ...

Computer Ephemeris for 2014 from DE200/LE200. ... Sidereal Time. ... Apparent equatorial positions. Ecliptical positions. ... Chebyshev polinomial approximation of positions. ... Position and velocity. ... Dynamical time. Sidereal time. ... Osculating elements of planetary orbits. Planetary configurations (by time). ... Fundamental ephemeris. ... Ephemeris for physical observations. ... Stars. ... All comments on Computer Ephemeris please direct to the author: charlie@mail.univ.kiev.ua ...

... Mokhovaya st., 11, Moscow, 103907, Russia . ... Moscow Institute for Physics and Technology . ... 9, Dolgoprudny, Moscow region, Russia. ... 1999, Vol. ... In this report, we discuss an approach to construction of information searching systems based on dynamic chaos and intended to operate in computer networks, local area or Internet. Also we discuss an application of this technology to the problems of searching for information in unstructured text databases with natural-language requests. ...

... Detailed Analysis of Change of Mesoporous Silicate Material Structure by X-Ray Diffraction . ... Study of Optical Properties of X-Ray System Based on Two-Zone Plates . ... V.V.Antipov , D.V.Irzhak , D.V.Roshchupkin , S.A.. ... Analysis of the Spectra of the X-ray Resonant Magnetic Scattering from Magnetic Multilayers . ... Investigation of Ni/ GaAs , Co/ GaAs Interface Properties in Light-Emitting Diodes Fabricated on the Base of In( Ga )As/ GaAs Quantum-Size Heterostructures . ...

... After 1958, when scientific satellites began exploring the Earth magnetic environment, many puzzling phenomena could be directly examined, especially the polar aurora and disturbances of the Earth's magnetic field [see Stern , 1989a]. ... The large-scale structure of the magnetosphere, the space region dominated by the Earth's magnetic field, was gradually revealed within the next decade: its trapped particles, its boundary, and its long magnetic tail on the night side. ... Introduction . ...

... After 1958, when scientific satellites began exploring the Earth magnetic environment, many puzzling phenomena could be directly examined, especially the polar aurora and disturbances of the Earth's magnetic field [see Stern , 1989a]. ... The large-scale structure of the magnetosphere, the space region dominated by the Earth's magnetic field, was gradually revealed within the next decade: its trapped particles, its boundary, and its long magnetic tail on the night side. ... Introduction . ...

... Galaxy Evolution Explorer (GALEX) . ... Searching for SZ clusters . ... Baryon content of galaxy clusters and cosmology . ... 3 sigma peaks: Observational Signatures of High Redshift Galaxies and Low Redshift Clusters . CLUSTERS OF GALAXIES . ... Clusters of galaxies seen in X-rays: war and peace . ... Chandra X-ray Observations of Clusters/Groups/Galaxies . ... Common timing features in neutron stars and black holes . ... X-ray luminosity function of low-mass X-ray binaries in galaxies . ...

... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . ... Two open clusters in Canis Major, emission nebula NGC 2316, and spiral galaxy NGC 2280 . January 21 28, 2016: Open clusters NGC 2204 and NGC 2243 in Canis Major offer small-telescope owners nice views, while large-telescope owners can seek out emission nebula NGC 2316 in Monoceros and sprial galaxy NGC 2280 in Canis Major. ...

... We address a question if globular clusters (GC) in a protogalaxy could for some time evolve chemically as isolated systems, enriching themselves with heavy elements produced in first supernova events that follow initial star formation. We determine both the critical mass of a protoglobular cluster that is needed to retain the ejecta of the very first supernova, and the critical energy (i.e., number of supernovae) that is needed to expel the residual gas from a cluster of a given mass. ...

... We sometimes use the word "nebula" to refer to galaxies, various types of star clusters and various kinds of interstellar dust/gas clouds. ... Early in this century, there was a great debate as to the nature of the nebulae like this one which at that time could not be resolved into individual stars. ... A typical galaxy is 100,000 light-years in diameter. ... M 42 shown) Reflection nebulae are clouds of dust which are simply reflecting the light of a nearby star or stars. ... M 1 shown) . ...

... LMC Project Outline . NGC 1818 Initial Results . ... The Large Magellanic Cloud (LMC) is uniquely suitable for the study of massive star clusters at all stages of evolution. By combining HST observations of these clusters with N-body models we hope to understand the origin and evolution of rich star clusters in our own Galaxy, in the LMC, and beyond. ... We aim to combine our HST observations with N-body models to understand the formation and evolution of globular clusters. ...

Stellarium 0.12.3 . ... Classes . ... FileљStructure . ... StelDialog Class Reference abstract . Base class for all the GUI windows in Stellarium. ... virtual voidљ . ... Retranslate the content of the dialog. ... voidљ . ... A local copy of StelDialog , the base class for all the GUI windows in Stellarium, included to allow the plug-in to be loaded dynamically on Windows. ... Closes the window (the window widget is not deleted, just not visible). virtual void StelDialog::createDialogContent . ...

... Астронет | ... планета Астронет | ... An investigation of the structure of non-uniformities of interstellar absorption using photometry of globular clusters . ... L. N. Berdnikov; D. G. Turner . A search for evolutionary changes in the periods of Cepheids using archival data from the Harvard observatory plate collection I: VY, WZ and GH Carinae . ... Study of changes in the periods of population II Cepheids in globular clusters I: M2 . ... A. O. Allakhverdiev; S. O. Tagiyeva; O. H. Guseinov . ...