Astronomy Picture of the Day . ... It is visible as the dark indentation to the red emission nebula in the center of the above photograph. The horse-head feature is dark because it is really an opaque dust cloud that lies in front of the bright red emission nebula. ... Just to the lower left of the Horsehead nebula featured picture is a blueish reflection nebulae that preferentially reflects the blue light from nearby stars . ... Publications with keywords: Horsehead Nebula . ...

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• Journal "Peremennye Zvezdy"
• Астронет > Reflections on the Horsehead Nebula
• Астронет > A Close Encounter Of The Stellar Kind

... B ut Europa's surface is not at all like anything in the inner solar system. ... T he images of Europa's surface strongly resemble images of sea ice on Earth. It is possible that beneath Europa's surface ice there is a layer of liquid water , perhaps as much as 50 km deep, kept liquid by tidally generated heat. ... It is most likely generated by sunlight and charged particles hitting Europa's icy surface producing water vapor which is subsequently split into hydrogen and oxygen. ...

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• Uranus' New Moons
• The Moon's Distance--Another Way
• The Lagrangian Point L1

J2000.0 coordinates -- source coordinates in J2000.0 epoch: right ascension and declination. Currently, the proper motion is assumed to be zero for all sources.

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... In this case the F5-F9 dwarfs turn out to be more metal-rich (by 0.1 in [Fe/H] ) thab G and K dwarfs, and the metallicity of the Hyades cluster turns out to be larger than the solar one [Fe/H] Hyades =+0.1 . ... При этом карлики F5-F9 оказываются богаче металлами, чем более поздние звезды, примерно на 0.1 по [Fe/H] , и металличность звезд Гиад относительно Солнца равна [Fe/H] Hyades =+0.1 . ...

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... At the summer date, at the chosen time, the Sun is high in the sky. at point S, while at the winter date, it is low in the sky, at point W. The shadow of the gnomon is always in the plane containing the Sun and the points A and B. If AB is a thin line, the shadow will also be a thin line, the intersection of this plane with the base of the sundial. ... Summer or winter, the shadow is therefore along the same line, the intersection of the above plane and the base of the sundial. ...

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• The Lagrangian Point L1
• Format of ACE plots
• X-ray photometer RF

... Generalized maximum entropy method and its application to antenna pattern reconstruction. In this paper the Generalized maximum entropy method and its application to the reconstruction of two-dimensional complex functions (namely, far-field antenna pattern distribution) from nonuniformly distributed samples are considered. ... It is shown that the Generalized maximum entropy method is sufficiently stable in the presence of errors. ...

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• Keywords_133

Mikhail Medvedev (University of Kansas) HEA- 2007 , IKI, Moscow Missing baryons in inter-cluster gas Afshordi, et al, 2007 , astro-ph/0612700 35% +/- 8% Sample of 260 clusters WMAP SZ 3yr data Compared with 11 simulated clusters Assumed: Universal NFW profile Self-similarity Isothermal gas Possible explanations Observed stellar mass in galaxies: ~ 10% (Lin, et al, ... Simulations indicate that the effect is small (Dolag, et al, 2004) Can account for ~1-2% missing mass at most ...

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• http://hea.iki.rssi.ru/conf/hea2007/bp-0.2.97/tests/TIMING
• http://hea.iki.rssi.ru/integral06/papers/D32_Khamitov01-04Oct06_10:26:31.pdf
• http://hea.iki.rssi.ru/integral06/papers/F39_Hjalmarsdotter02-17Apr07_14:19:21_bandw.pdf

Blueshifted galaxies in the Virgo cluster I. D. Karachentsev, O. G. Nasonova (Kashibadze), Special Astrophysical Observatory, Russia We consider a sample of 65 galaxies with negative radial velocities with respect to the Lo cal group in the Virgo cluster. ... E, S0 20 ° The radial velo city VLG ­ magnitude mB distribution of sample ob jects. ... The centroid drift for galaxies ranged by VLG from zero to the extremal negative velo city (-866 km/s). ...

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• http://www.sao.ru/Doc-en/Science/Public/Conf/magstars-2010/p466.pdf

... A glance at the article might leave you assuming that the planet was discovered using a large telescope at a remote, high-elevation location or perhaps by a multi- billion dollar observatory in Earth orbit. Reading on, you may be surprised to find that astronomers actually discovered the planet with a small telescope located not too far from the city of Tucson, Arizona. ... Well, don't give up, because you can observe interesting celestial sights near low-elevation big cities. ...

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... The project assumes creation of an international space observatory - the interferometer "Earth - Space - Space" in order to perform of astronomical investigations in millimeter, submillimeter and infrared regions with extremely high sensitivity (to a few nanoJanskies units of flux density in continuum spectrum) and extremely high angular resolution (to a parts of microsecond of arc or, possibly, nanosecond). ... radio-interferometric channels of the system "Space - Space", region 0.2 - 3 mm; . ...

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... 101) Байки из Фидо (7) Литература (16) Листая страницы прошлого Выберите месяц Апрель 2016 (2) Март 2016 (4) Февраль 2016 (4) Январь 2016 (5) Декабрь 2015 (4) Ноябрь 2015 (3) Октябрь 2015 (5) Сентябрь 2015 (5) Август 2015 (5) Июль 2015 (5) Июнь 2015 (4) Май 2015 (8) Апрель 2015 (5) Март 2015 (4) Февраль 2015 (4) Январь 2015 (7) Декабрь 2014 (7) Ноябрь 2014 (4) Октябрь 2014 (5) Сентябрь 2014 (8) Август 2014 (8) Июль 2014 (6) Июнь 2014 (7) Май 2014 (11) Апрель 2014 ...

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• Dark Stars and Boosted Dark Matter Annihilation Rates. (arXiv:1008.0348v1
• Stellarium: Quasar Class Reference
• Stellarium: BigStarCatalogExtension::StarWrapper< Star > Class Template

... Space flight . Crew training . ... honing the skills of performing the tasks of operating the orbital (suborbital) spaceship in a normal autonomous flight and in case of occurrence of off-optimum situations; . ... preparing for conducting visual observations, photographing and video filming envisaged by the flight program; . ... preparing the astronaut's body to the effect of space flight factors, honing the skills of operating the spaceborne medical facilities, rendering self and mutual aid; . ...

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... 4, Nњ27, 1965. RONCHI TEST A N D TRANSVERSAL ABERRATION ])(11/iel 1\1a lacara SPHERICAL SI':\L-\RIO La prucha dc Ronchi cs sumameute Ъtil para dctcrminar la (:alidad de sistemas уpticos que tendrнan ahcrra<:Нуn dc esfericidad transvcrsal. aЪu eu el caso de cstar perfectamente construidos. ... EXTENDED I ї Copyright 1965: Observatorio Astronуmico Nacional, Universidad Nacional Autуnoma de Mйxico SOURCE ~ ~ '\ RONCHI RULING - t t PLATE tCORRECTING SPHERICAL MI RROR ]'igure 2.- ...

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... After the edit, recompile the kernel and recompile the Apache server then reboot. ... If you're running a really busy BSD Apache server, the following are useful things to do if the system is acting sluggish: . ... Maximum # of processes . ... This machine is a server that handles lots of traffic, # so we crank that value. options NMBCLUSTERS=4096 # mbuf clusters at 4096 # # Misc. options # options CHILD_MAX=512 # maximum number of child processes options OPEN_MAX=512 # maximum fds (breaks RPC svcs)...

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• Apache module mod_unique_id
• Apache HTTP Server Project
• The Apache EBCDIC Port

... Using the CFBDSIR wide field survey for brown dwarfs, we identified CFBDSIRJ214947.2-040308.9, a late T dwarf with atypically red J-Ks colour. ... SN 2009ip in NGC 7259 Electronic Telegram No. ... 7.09, [19.0; 2009 Aug. ... Accepted for publication in MNRAS Subjects: High Energy Astrophysical Phenomena (astro-ph.HE) The jet opening angle theta_jet and the bulk Lorentz factor Gamma_0 are crucial parameters for the computation of the energetics of Gamma Ray Bursts (GRBs). ...

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Trace: ranking . ... CREATE OR REPLACE FUNCTION my_rank (tsvector, tsquery, int ) RETURNS float AS $$ use List::Util qw(min max); my ($string, $ query ) = @_; my $maxpos = 0; # Parse tsvector, taking into account positional information foreach (split / /, $string){ if(/^'(\w+)'(:([0-9,]+))?$/){ foreach(split /,/, $3){ $ vector {$_} = $1; $maxpos = max($maxpos, $_); } } } my @ vector = map {$ vector {$_}} sort {$a = $b} keys(% vector ); # Parse tsquery, assuming it to be ORed only $ ... SAI VO | ...

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... Bad Astronomy . ... News . ... In the following article, I used the wrong number to get the circumference of the Earth at the latitude of Cape Canaveral, which ironically is what I accuse Ms. vos Savant of as well! ... At the Equator, the Earth spins at 1000 miles per hour (the Earth is 24,000 miles around, and spins once every 24 hours). ... The math is a wee bit hairy, but not too bad, to calculate the circumference of the Earth at Cape Canaveral assuming the Earth is an ellipse with these numbers...

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• Phil Plait's Bad Astronomy: The Logo
• Phil Plait's Bad Astronomy: Info
• Phil Plait's Bad Astronomy: Bitesize Tour of the Solar System

Abstract for the 2 nd International Workshop "The Art and Science of Interstellar Message Composition", Paris, France, March 23-24, 2003 . Limitations on Volume of Interstellar Radio Messages . ... There are three possible sources of transmission of the interstellar radio messages (IRMs) now: Arecibo Radar Telescope (ART, 305-m dish, 1000-kW transmitter at 12.6 cm wavelength), Goldstone Solar System Radar (GSSR, 70 m, 480 kW, 3.5 cm), and Evpatoria Planetary Radar (EPR, 70 m, 150 kW, 6.0 cm). ...

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• Making a Case for METI
• Synthesis and transfer of the interstellar radiomessage "Cosmic Call 2003"

... In the table given at a separate sheet enumerate in growing order (from 1 to 13) the size and the mass of each object: Milky Way Galaxy, Andromeda Galaxy, Neutron star, Electron, Mercury, The first satellite "Sputnik I", Venus, Pluto, Proton, Red dwarf, Black cat, White (Polar) bear, the Sun. ... Ashulia's coordinates are 23°53.6' N, 90°19.8' E. Draw pictures explaining your solution. ... The solution has to include an artistic picture with an image of the Bengal Tigerastronomer observing the star. ...

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• http://www.issp.ac.ru/journal/composites/2014/content_02_eng.pdf
• http://www.issp.ac.ru/lek/gantmakher/art005RE.pdf
• http://www.issp.ac.ru/libm/papers/1999-17.pdf

TEMPERATURE OF REGOLITH IN COLD TRAPS ON THE MOON A.A. Berezhnoi Sternberg Astronomical Institute Moscow, Russia The hypothesis of the existence of the lunar ice in cold traps was stated in (Watson et al., ... Arnold, 1979) estimated the mean temperature on the surface of lunar cold traps as 40-90 K. We plotted the dependence of regolith mean temperature on depth for these two values of mean temperature on the surface (see figure 1). ... Arnold J.R. Ice in the lunar polar regions, J. Geophys. ...

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• http://selena.sai.msu.ru/Symposium/RadioMoonE.pdf
• http://selena.sai.msu.ru/Kozl/Publications/ASR%20Origin%20and%20Stability.pdf
• http://selena.sai.msu.ru/Pug/Publications/SSR447.pdf