... The overall globular cluster population is divided by gap in the metallicity function at [Fe/H]=-1.0 into two discrete groups with well-defined maxima at [Fe/H]=-1.60?0.03 dex, and -0.60?0.04 dex. ... Clusters with extremely blue horizontal branches occupy a spherical volume of radius ~ 9 kpc, have high rotational velocities ( V rot =77?33 km/s), have substantial and equal negative radial and vertical metallicity gradients, and are, on average, the oldest group (the old-halo subsystem). ...

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• Vladimir Marsakov Publication List
• Population of Galactic globular clusters, figures
• Vladimir Marsakov. Catalogues

... SPECIAL HONORS: Eagle Scout; Sam Houston Area Council 1976 Distinguished Eagle Scout Award ; Presidential Medal for Freedom, 1970; NASA Distinguished Service Medal; two Navy Distinguished Flying Crosses; 1967 FAI De Laval and Gold Space Medals (Athens, Greece); the American Academy of Achievement Golden Plate Award ; City of New York Gold Medal in 1969 ; City of Houston Medal for Valor in 1969 ; the National Academy of Television Arts and Sciences special Trustees ...

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• Astronaut Bio: William Anders
• Astronaut Bio: Eileen Collins (5/2006)
• Astronaut Bio: Robert L. Stewart

. Hubble Space Telescope images of five of the newly identified UCDs and a normal dwarf galaxy (dEN) are shown along with their positions in the Fornax galaxy cluster. The positions of the two UCDs not pictured are also shown. Michael Hilker; Background: Arna Karick (Univ. of Melbourne), Curtis Schmidt Telescope; Insets: HST

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• Dark matter scaffolding of universe detected for the first time | Astronomy.com
• Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets,
• Planck spots hot gas bridging galaxy cluster pair | Astronomy.com

... Classes . ... Nebula Class Reference . ... getInfoString (const StelCore *core, const InfoStringGroup &flags) const . ... getCloseViewFov (const StelCore *core=NULL) const . ... getVMagnitude (const StelCore *core, bool withExtinction=false) const . ... getSelectPriority (const StelCore *core) const . ... getEquinoxEquatorialPos (const StelCore *core) const . ... getJ2000GalacticPos (const StelCore *core) const . ... getPositionInfoString (const StelCore *core, const InfoStringGroup &flags) const . ...

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• Stellarium: Refraction Class Reference
• Stellarium: StelQGLArrayVertexBufferBackend Class Reference
• Stellarium: BigStarCatalogExtension::StarWrapper< Star > Class Template

... Bad Astronomy . ... Bitesize Astronomy . ... Bad Astro Store . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... So far in our hop from cluster to cluster we've seen associations , then constellations , and then our first truly bound group of open clusters . ... Some open clusters have tens of thousands of stars, but a decent globular cluster has over a million. ... Our Milky Way galaxy sports about 100 globulars that we have detected. ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Misconceptions
• Phil Plait's Bad Astronomy: Bad TV

... MASTER Net is 56 square degrees per 1 exposition . ... 06 Dec 2015: GRB 151205B: MASTER-NET early optical observations GCN18665 . ... 18 Nov 2015: GRB 151118A: MASTER-NET optical observations GCN18613 . ... 12 Nov 2015: GRB 151112A: MASTER-NET optical limit GCN18591 . ... 07 Nov 2015: GRB 151107A: MASTER-NET optical observations GCN18565 . ... 31 Oct 2015: Five OTs detected by Global Robotic MASTER Net ATel8232 . ... 02 Oct 2015: GRB 151001B: MASTER-NET early optical observations GCN18380 . ...

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. The value of the PATH variable is set so that you have access to the commands available on your system. You can use commands that are not on your path list by setting a new value for the PATH environment variable. Did You Know? .

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• Commands available in send mode
• Local command(s) for showing available printers
• Using the shift command

FSP1 : The time intervals corresponding to the INTERBALL TAIL PROBE (IB_TAIL) or GEOTAIL passage through the simulative magnetosphere boundary layer (BL) . ... FSP3 : That part of the FSP1 or FSP2 time intervals, which corresponds to the magnetic conjugations between any couple of the considered spacecraft. The value of the relative geocentric angular distance between magnetic field line's footprints is considered during FSP3 situation selection. ...

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• Basic definitions [Oulu]
• Isotropic boundary (Oulu)
• List of currently available KP AZ.

... НЕПРЕРЫВНОГО МАТЕМАТИЧЕСКОГО ОБРАЗОВАНИЯ . ... Кружок ?Олимпиады и математика? ... Московская математическая олимпиада . Заочный математический конкурс . ... Устные математические олимпиады . Олимпиады по программированию . Математический праздник . Математические регаты . ... Математические бои . Олимпиада по геометрии им. И.Ф.Шарыгина . ... Программа ?Math in Moscow? Научные конкурсы . Творческий конкурс . ... График олимпиад . ... XXVII Математический праздник . ...

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• Conference Moduli Spaces
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• Christophe Pittet. MATHEMATICAL ASPECTS OF QUANTUM COMPUTATIONS (Spring 2011)

... We have compared visualized fields of GSC and USNO A1.0 catalog with unpublished photographic finding charts that were sent by L. Plaut to the compilers of the GCVS. ... 7-15 A9 --- GCVS GCVS or NSV name 17-25 F9.4 --- GSC GSC number 26 A1 --- NoteFlag *Nonstar (GSC) flag 28-29 I2 h RA2000GSC.h Hours RA (GSC), equinox 2000.0 31-32 I2 min RA2000GSC.m Minutes RA (GSC), equinox 2000.0 34-38 F5.2 s RA2000GSC.s Seconds RA (GSC), equinox 2000.0 40 A1 --- DE2000GSC.- ... Plaut, L., 1966, Bull. ...

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• GCVS Research Group: Homepage.
• Index of /groups/cluster/gcvs/gcvs/nsv
• Index of /groups/cluster/gcvs/gcvs/iii

Please enter the lightcurve file name and period search parameters: . Lightcurve file: . ... Apply the Heliocentric correction and convert all dates to Terrestrial Time (TT)? ... Also, the Heliocentric correction cannot be applied to such lightcurves. ... This period search service is also available at the mirror sites: Mirror 1 , Mirror 2 , Mirror 3 , Mirror 4 . You may download the latest source code distribution and install the period search service at your own web server. ...

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• The NMW survey homepage

... Impact on source motion in Galactic coordinate system is given by Kovalevsky (2003), Malkin (2011) l cos b = -A sin l, b = -A cos l sin b, where A = R0 02 /c is the galactocentric acceleration called hereafter the GA constant. ... We just have to return to the traditional many-centuries-old astrometric practice of modelling the position of a celestial object as a linear trend with two parameters: the position at the initial (conventional) epoch and the apparent (proper) motion. ... 2011). ...

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• http://www.gao.spb.ru/english/as/j2014/presentations/iddink.pdf
• http://www.gao.spb.ru/english/personal/malkin/publ/zm08g.pdf
• Pulkovo NEO Page: Estimation of Observational Accuracy

... Over the first 4 years, its X-ray telescopes eROSITA and ART-XC will survey the whole sky with a record sensitivity in the 0.5-10 keV energy band. ... The goal of the second international Spectrum-RG conference is to discuss the different scientific topics addressed by the mission, synergies with surveys at other wavelengths, and requirements to follow-up observations.Contributed talks and poster presentations are invited on the topics related to the SRG science goals. ... Active galactic nuclei . ...

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• Spectrum-Roentgen-Gamma - The astrophysical Project at IKI RAN
• Andrey Kravtsov "High-Resolution Cosmological Simulations of Cluster Formation"

... astro-ph . ... SAI VO . ... Spectra disentangling applied to the Hyades binary Theta^2 Tau AB: new orbit, orbital parallax and component properties . ... Theta^2 Tauri is a detached and single-lined interferometric-spectroscopic binary as well as the most massive binary system of the Hyades cluster. ... Due to the strategic position of the components in the turnoff region of the cluster, these new determinations imply stricter constraints for the age and the metallicity of the Hyades cluster. ...

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The 2dF QSO Redshift Survey (2QZ) . ... Before jumping into all the finer details of teh survey, a brief non-astronomer's guide to redshift surveys is available. ... The primary scientific aims of the QSO survey are: (1) to obtain the primordial fluctuation power spectrum out to COBE scales, (2) to determine the rate of QSO clustering evolution in the non-linear and linear regimes and hence obtain new limits on the value of and the bias parameter, (3) to apply a powerful geometric method to measure . ...

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... sin f = y / r . cos f = x / r . ... They are now viewed as new definitions of the sine and cosine, for the polar angle f given by x and y ( a slightly different way of formulating this definition is described further below ). ... sin 2 f + cos 2 f = 1 . ... Angle . ... Many trigonometry texts define the sine and cosine slightly differently, using the so-called unit circle . ... Then the distance AB ("the sine line") equals sin a , and the distance OA ("the cosine line") equals cos a . ...

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• Shift
• Satellite position in the SE and GSM coordinate systems
• The Favourable Spatial Position

... 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. ...

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• Home page of Dmitri Wiebe
• On current distance scales for open clusters

... New magnetic field detections have b een obtained for 19 stars, including a -9 kG magnetic field detected in the very young Rosette Cluster memb er NGC 2244-334 (a longitudinal field intensity second only to that of Bab co ck's star). In particular, we demonstrate robust exceptions to the prop osal that Ap stars acquire their magnetic fields only after completing a substantial fraction of their main sequence evolution. ... It is a bona fide member of the open cluster NGC 2516. ...

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• Laboratory for the Stellar Magnetism Study of SAO of the RAS - Physics and
• Bus Hound
• CV of Dmitry S. Nasonov

Optical characteristics of non-spherical scatterers (definitions) . Most popular scatterer models and their parameters (a table) . ... Minsk collection of references to over 8000 light scattering papers (available partly) . ... Light scattering codes (incl. our codes with results of test runs) . Benchmarks in optical properties (in tabular form) . Dependence of optical properties on scatterer parameters (a graphics library) . ... Miscellaneous (incl. other similar databases) . ...

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• Model of clusters
• Modelling the Milky Way in the Era of Gaia - JD5 Rationale
• Introduction

The new view on the population of Galactic open clusters A.E.Piskunov1, N.V.Kharchenko2, S.RЖser3, E.Schilbach3, R.-D.Scholz4 1 2 3 4 Institute of Astronomy, Moscow, Russia Main Astronomical ... Observatory, Kiev, Ukraine Astronomisches Rechen-Institut, Heidelberg, Germany Astrophysikalisches Institut Potsdam, Germany What are open clusters and what do they teach us Groups of Population I ... Cluster complexes: OCC-1 = Gould's Belt cluster complex? ...

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