... 2008 December 11 . At the Center of the Milky Way . ... Explanation: At the center of our Milky Way Galaxy lies a supermassive black hole . Once a controversial claim, this conclusion is now solidly based on 16 years of observations that map the orbits of 28 stars very near the galactic center . ... Their ability to track stars so close to the galactic center accurately measures the black hole's mass and also determines the distance to the center to be 27,000 light-years. ... About APOD | ...

RSAA Home . GSAOI Home . ... Other Links . ... Control Software Links . Optics Links . Micro-Optics Links . ... Optical Materials Databases . ... Rockwell Science Center home page . ... Santa Barbara Research Center home page . ... CCD-World home page . ... SDSU home page . ... EPICS home page . ... Optics Society of America . SPIE - Society for Optical Engineering . ... ZEMAX software (Focus Software page) . OPTICAD software (Focus Software page) . ... RedHat home page . ...

... World Data Center . for Solar-Terrestrial Physics . Moscow, Russia . ... Siberian Solar Radio Telescope, Institute of Solar-Terrestrial Physics, RAS SB, Irkutsk, Russia. ... Data of the Crimean Astrophysical Observatory on the ftp-server of the Solar-Terrestrial Physics Division, National Geophysical Data Center, Boulder, USA. ... World Data Centre for Solar-Terrestrial Physics, Chilton, UK. ... Solar-Terrestrial Physics Division, National Geophysical Data Center, NOAA, Boulder, USA. ...

... CORCHAN(1) specifies the number of spectral channels per baseband channel (one polarization component) that the correlator will write. CORCHAN(2) specifies the number of channels to use in the internal FFT in the correlator. ... Over averaging can cause loss of amplitude due to ``delay smearing'' -- the effect of large phase slopes across the channels going into an average. ... But excessive numbers of channels lead to excessive output data rates and data set sizes. ...

SXG Data Center . ... Sky visbility This utility permits to find the sky region that will be accessible for obsevation by the main telescopes of SXG. Observation opportunity programm This utility permits to find the the observation opportunity of given source ( RA, DEC ) during given MJD interval by the telescopes of SPECTRUM-XG directed along X-axis. Mask of the Earth/Moon This utility permits to find the sky region that will be blocked by the Earth/Moon for observation by SPECTRUM-XG . ...

... About 10% of the time is allocated to moving the telescope to the zenith and exchanging the spectrographic cartridges. ... Focus telescope (open-loop)* . ... TOTAL TIME (seconds) . ... This assumes two 60 second arc exposures and two 55 second readouts. ... Otherwise, the arc exposure will likely consist of a 30 second integration followed by a quick 28 second readout, half the normal time. ... The flat-field exposure can be read out with a quick 28 second readout, half the normal time. ...

... CENTER> . ... Заголовки , текстовые элементы, блоковые элементы, а также элементы ADDRESS . ... Элемент CENTER эквивалентен DIV с ALIGN=CENTER. CENTER был введен Netscape прежде, чем в нем была добавлена поддержка элемента DIV. ... Использование атрибута ALIGN в элементах P и заголовках - предпочтительнее использования элемента DIV. Так как CENTER - блоковый элемент , он закрывает открытый элемент P (т.е. заставляет броузер вставлять тег </P>, когда это необходимо). ...

... The spectrograph SP-124 at the Nasmyth-1 focus of the 6 m telescope with UAGS camera and Photometrix CCD PM1024 ( m pixel size) was used for the observations. ... Gratings with 300 and 600 grooves/mm were used, resulting in a spectral resolution of approximately 12 and 6 ? ... A He-Ne-Ar lamp was used for wavelength calibration. ... April 6.914 . ... The reduction of the original two-dimensional CCD data included the standard steps such as bias and dark subtraction, flat-fielding, cosmic-ray removal...

... The resolution used was R=19,000 (= 0.2-0.5 е) from 3600- 9000 е ABSTRACT H H Highly Variable Balmer Lines a) Inverse P-Cygni Profiles H and H present consistent IPC profiles in their emissions with red-displaced absorption components Recent detections of rapid variability in most lines observed (3600 to 9000 е, resolution = 0.2-0.5 е), in the enigmatic Herbig Be star ... However, a small number of HAeBe (11%) and T Tauri (7%) stars have been found to present IPC profiles in H (3)....

... Centers . ... Samara region . ... Samara State Aerospace University Research Research and education centers Testing center "Unicon" on the certification tests in the declared field of accreditation (IC-69) . ... Certification tests; . The periodic tests for the benefit of manufacturers of components; . ... SAMARA STATE AEROSPACE UNIVERSITY . Address: 34, Moskovskoye Shosse, Samara, Russia, 443086 . ...

... 2001 - present-day Researcher in Theoretical Department of Astro Space Center of Lebedev Physical Institute ot RAS . ... Department Number . ... Astro Space Center . ... arna@lukash.asc.rssi.ru . ... Arkhipova N.A., Komberg B.V., Lukash V.N., Mikheeva E.V., "Population of Cosmic Voids", Astronomy Reports 51, pp 787-796 (2007) . ... Surdin, V.G., Arkhipova, N.A., "Influence of dissipation and dynamical friction on the number of globular clusters in a galaxy", Astronomy Letters, Vol.24, p.343 (1998) ...

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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 . ...

... Subject and Problems of Stellar Astronomy. ... Plane of Galaxy, Methods of Its Location Determination. ... Stars Distances. ... Other Methods of Stars Distances Determination. ... Tangential Velocities, Their Determination by Self-Motions. ... Determination of Solar Apex and Spatial Velocity by Radial and Spatial Velocities of Stars. ... Features of Orientation and Parameters of Peculiar Stellar Velocities Ellipsoid. ... General and Selective Light Absorption in Galaxy. ... Darc Clouds in Galaxy. ...

. MASTER telescope FOW (white rectangle), IPN error box and FERMI GBM 1 and 3 sigma statistical error boxes on the part of the Very Wide Field Camera image. Click for full camera image. MASTER telescope image with IPN error box and OT candidates position. Click for full telescope image. Optical transient candidate 1. MASTER image (left), DSSS image (center) and SDSSS (right) . Optical transient candidate 2. MASTER image (left), DSSS image (center) and SDSSS (right)

... Dept. for Astrometry & Space Geodynamics . ... Dept. for Physics of Stars&Galaxies . Dept. for Space Plasma Physics . ... Laser station . ... 2016,MNRAS, 2016MNRAS.tmp.. ... 2016,MNRAS, Vol.455 ,is.1,p.357-369. ... 2016,MNRAS, Vol.456 ,is.1,p.181-191. ... WASP- 22, WASP-41, WASP- 42 and WASP- 55. ... 2016,MNRAS, Vol.456 ,Is.1,p.990-1002. ... GNSS stations System.NET network , which send their observations to IGS and EPN through the Operational center of MAO NAS of Ukraine . ...

... Our Sun is part of a huge wheel-shaped collection of stars. ... Astronomers have long suspected it was a very massive black hole, and that every galaxy had such a central mass, created early in the history of the universe. ... However, unless that object happens to be headed directly at the black hole (a relatively small target) it will just swing around and fly away again, like a comet making a pass at the Sun. The velocity acquired in falling towards the black hole also helps it escape. ...

... 2000 December 20 . Sgr A*: Fast Stars Near the Galactic Center . ... Explanation: Why are these stars moving so fast? Shown above is a time-lapse movie in infrared light detailing how stars in the central light-year of our Galaxy have moved over the past eight years. ... If these fast stars are held to the Galactic Center by gravity, then the central object exerting this gravity must be both compact and massive. ... About APOD | ...

... Fall 2005 . Fall 2004 . Winter 2005 . Spring 2005 . Summer 2005 . Fall 2003 . Winter 2004 . Spring 2004 . Summer 2004 . Fall 2002 . Winter 2003 . Spring 2003 . Summer 2003 . ... The Swift gamma-ray burst explorer was launched on Nov. 20, 2004 from Cape Canaveral, Florida. ... A number of models describing exotic forms of matter, generically referred to as dark energy (not to be confused with dark matter), have been proposed to explain this acceleration. ...

... 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. ...