Next: Carbon stars Up: OTHER HYDROGEN-DEFICIENT STARS Previous: Extreme helium stars and . V348sgr may be more closely related to about twenty hydrogen-deficient central stars of planetary nebulae which have similar carbon abundances ( ) and strong emission line spectra ([ Leuenhagen et al. 1995 ], [ Leuenhagen & Hamann 1997 ]). ... Hydrogen-deficient and carbon-rich knots are seen in the inner nebulae of at least two objects (Abell 30 and Abell 78). ...

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Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Moon . ... Space Flight . ... One of the best-known lunar craters, Tycho is not especially large at some 85 km across. ... Bright and with prominent rays of material radiating from it, Tycho is a young crater; there has been little time for the slow and steady rain of micrometeorites to erode it. ... NASAтАЩs LRO recently took this evocative image of the steep slopes of TychoтАЩs central peak illuminated by the morning Sun. ...

... eregionanalyse imageset=emosimage.ds srcexp="(DETX,DETY) in CIRCLE(639,-769,1200)" . backexp="(DETX,DETY) in CIRCLE(11400,-700,1200)" . This will set the parameters, xcentroid and ycentroid , to be the centre of the counts distribution within the source box; the optimum radius from the source and background count distribution and the number of counts in the source box. ...

Computer Ephemeris for 2014 from DE200/LE200. Longitude of central meridian of Saturn. ...

. Index . <- . -> . Central Citani . 29 dicembre 2008 21:01:53 .

. Album : asv-album :: Travels to distant places and countries :: 1997/08 Kyoto, Nara (Japan) :: 21/08 Toji temple flea market, Gion district . Up . << Prev . Toji temple, central building. On August 21, the huge flea market teems on the temple territory. Next >> . Photo album generated by album a MarginalHack by Dave Madison on Tue Jun 23 14:46:14 2015 .

Central Bodies Masses of Selected Globular Clusters N.A.Shakht, A.A.Kiselev, Yu.N.Gnedin and E.A.Grosheva. The Main Astronomical (Pulkovo) Observatory RAS 47 Tuc ­NGC 104 RA 00 24 .1 Dec -72° 04 .9 Size = 30.9 mvis + 4. 0 m D from = 12,1 kpc, h m Cen - NGC 5139 NGC 6397 (Ara) RA 17 h40.m7 Dec -53o 40'.4 Size = 31',0 mvis + 5,3m D from =2.3 kpc RA 13h 26m .8 Dec -47° 28 6 Size = 36.3 m vis +3. 7 m D from =15.8 ±1.1 kpc, 12109 years, Age: 10109 years, (13.4 ± 0.8)109 years. ...

... Cooperation with third countries and international organizations . ... Scientific and technological cooperation with the Countries of Central Europe (CCE) and the new independent States (NIS) . ... 1 .A SPECIFIC RTD PROGRAMME IN THE FIELD OF COOPERATION WITH THIRD COUNTRIES AND INTERNATIONAL ORGANIZATIONS-INCO 8 . ... From EU Member States and CCE/NIS 28 . From other European countries 28 . ... Contact persons in the EFTA/EEA Member States 43 . Contact persons in other countries 44 . ...

UPPER PANEL: The gas surface density map in log scale. The red circle in the center represents the central protostar. The development of spiral structure in the protostellar disk is evident. Dense protostellar/protoplanetary clumsp form within the spiral arms and are driven into the protostar by the action of gravitational torques. LOWER PANEL: The mass accretion rate onto the protostar as a function of time. The mass accretion rate is characterized by very short ( . ...

... Stellar disks of our LSB galaxies are thinner than HSB (high surface brightness) ones. ... The value LSB galaxies. b) The ratio of dark to luminous mass Mh /(Mb + M d) is plotted against the disk central surface brightness µ0 with the same notation as in Fig. 3a. There is no systematic difference in the relative dark matter mass between the LSB and HSB galaxies. c) The ratio of the spherical to disk mass Ms /Md is shown in dependence on the disk central surface brightness. ...

... BANKNOTES . Cyprus pound = 100 cents . The following banknotes (1997 design) are legal tender as from 6/5/1997. (click on the images for enlarged view) . ... FRONT . Predominant colour brown. ... Predominant colour purple. Limestone head(5th century BC) . ... BACK . ... Predominant colour green. Head of goddess Artemis . ... Predominant colour blue. ... Note: A new CYP20 banknote will be issued during the last quarter of 1997. ... Central Bank of Cyprus, 1997 All rights reserved . ...

... Bad Astronomy . ... Bitesize Astronomy . ... Mad Science . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Area of science: Astronomy . ... Stellar property requirements for supernova vs. nova (mass, nearby celestial bodies, stellar composition, etc.) ... A nova is actually a binary system, usually a normal star like the Sun and a small dense white dwarf. ... One is very similar to a nova: a binary system with a normal star and a white dwarf. ... 2008 Phil Plait. ...

Russian Astrometry Conference "Pulkovo-2015" First announcement Dear colleagues! ... Program committee Stepanov A.V. ( Pulkovo Observatory , Russian Academy of Sciences ) ­ Chair Devyatkin A.V. ( Pulkovo Observatory , Russian Academy of Sciences ) ­ Vice-Chair Abalakin V. K. ( Pulkovo Observatory , Russian Academy of Sciences ) Bobylev V.V. ( Pulkovo Observatory , Russian Academy of Sciences ) Emeljanov N.V. (Sternberg Astronomical Institute , Moscow ...

The Earth. ... The middle raiding of the Earth is 6371,032 km, the pole 6356,777 km equatorial - 6378,160 km. The Earth surface area is 510,2 mln km^2, 70,8% of which is the World ocean. ... According to the modern cosmogonical views the Earth was formed 4,6 - 4,7 billions years ago from the protoplanet cloud captured by the Sun. ... The Earth is conditionally divided into 3 parts: a bark a cloak and a core (in the centre). The external layer - the bark is 35 km thick. ... Above the Earth. ...

EVOLUTION OF GALACTIC DISCS: TWO MODES OF STAR FORMATION ABSTRACT We develop the model of the evolution of surface gas density, stellar density, star formation rates and chemical composition of galactic disc taking into account the gravitational instability of rotating gaseous layer in the scales of several kpc. ... In the model we took into account the gas return from evolved stars, a radial movement of the gas in a spiral arms and accretion of the gas into the galactic disc. ...

astro-ph/0208565 . ... Comments: 6 pages, 3 figures, accepted by A . ... Авторы с помощью специализированного компьютера GRAPE-6 проводят расчет структуры внутренних частей скопления М15 и проводят сравнения с наблюдениями. Напомню, что недавно именно этот объект стал популярен в связи с возможностью существования в нем черной дыры промежуточной массы. ... См. также astro-ph/0210158 , где также обсуждается наличие черной дыры в М15, и масса ее получается равной 5400-1000 (или меньше!) масс Солнца. ...

... 0 ) = Z '' '' 0 [(1 \Gamma '')'' 1=2 sin 2 i sin 2!] ... We use the similarity theory to present the non--dimensional period T \ Lambda of the evolution of the parameters '' and i as a product of the independent factors: T \ Lambda = \ Gamma (4=15)(a \ Gamma3 =2 \ Lambda =LD )jL c (c 1 ; c 2 )j. Here LD = Ї k \ Lambda a \ Gamma3 k \ Lambda '' \ Gamma3 =2 k Ї \Gamma1=2 \ Lambda is the non-- dimensional parameter of disturbances similarity dependent on the dynamical characteristics of the ...

... part 1 | ... Part 3 . The new circuit of global tectonics of the planets and their satellites . ... The "too hot" substance (magma) is formed of combination of different sort of atoms of chemical elements, spontaneously arising in the entrails of the pre-Earth cosmogenic vortex (and equal in entrails of other celestial object of spherical form). ... The water dropped out from the last it gradually was condensed and formed the widths of uniform Global ocean. ...