... Resembling a gigantic hubcap in space, a 3,700 light-year-diameter dust disk encircles a 300 million solar-mass black hole in the center of the elliptical galaxy NGC 7052. ... Because the front end of the disk eclipses more stars than the back, it appears darker. ... Despite its size, the disk is 100 times less massive than the black hole. ... The bright spot in the center of the disk is the combined light of stars that have crowded around the black hole due to its strong gravitational pull. ...

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spaceweb@oulu.fi - last update: 1 July 1998, 1200 UT (RR) . ... Relates the wave number k to the wave frequency. ... From the equation of motion , m d v /dt = q( v x B ) one can calculate that, in a presence of magnetic field B , a charged particle is accelerated in direction perpendicular to both v (perp) and B . ... The angle a between magnetic field B and velocity vector of a charged particle, v ., i.e., sin a = v(perp) / v(total), where v(perp) refers to the velocity component perpendicular to B . ...

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• The Sun
• The Sun's Corona
• Motion in a Circle

... The MIDAS system is available, free of charge, to all non--profit research institutes, whereas other organisations or companies may be charged a nominal fee to cover distribution. Institutes interested in using MIDAS must sign a User Agreement before they receive MIDAS. The necessary forms can be obtained by contacting the Data Analysis Group at ESO/Munich. ... The current system at ESO/Munich is frozen several months prior to the official release. ...

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• Writing Your Own Widgets

Employing the maximum entropy method (MEM) algorithm, we fit interstellar extinction measurements that span the wavelength range 0.125-3 ЮМm. We present a uniform set of MEM model fits, all using the same grain materials, optical constants, and abundance constraints. ... Although such usage is only a first step, the results do provide interesting insight into the use of grain size as a diagnostic of dust environment. ... ADS ] . ADS Citation Query . ... citations vs. year [year,citations] . ...

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• Gaps in the Cloud Cover? Comparing Extinction Measures in Spiral Disks
• ST ScI Preprint #1374
• Dust disk around a black hole in galaxy NGC 7052

... Archives . ... I asked a couple of astronomers if they heard the term plug-in estimator and none of them gave me a positive answer. ... Whilst clarifying the form of sampling distribution, or on verifying the formulas or estimators of sample mean and sample variance truly match with true mean and true variance, I can drop plug-in part because I know asymptotically such interval (estimator) will cover 68%. ... Category: Bad AstroStat , Cross-Cultural , Data Processing , Jargon , Uncertainty | ...

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• Tom's POVRay Noseman Magnet
• Tom's POVRay Tub Filler
• The AstroStat Slog Cover

... The SMS program is a critical endeavor to investigate whether the predictions of standard cold dark matter cosmology are consistent with the observed matter distribution in the Milky Way halo. It is the deepest, most extended search for optically elusive dwarf satellite galaxies and tidal streams to date, covering the entire Southern hemisphere. ... However only a few dwarf satellites have been found around the Milky Way to date - 22 dwarfs compared to 500-10,000 predicted by theory (Klypin et al. ...

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• Covers come off the artwork as fine weather returns
• Covers go over the artwork as inclement weather threatens
• Siding Spring Survey

Astronomy Picture of the Day . A Halo Around the Moon . ... 21.04.2003 . ... Explanation: Have you ever seen a halo around the Moon? This fairly common sight occurs when high thin clouds containing millions of tiny ice crystals cover much of the sky. Each ice crystal acts like a miniature lens. ... April 2003 . ... NASA Web Site Statements, Warnings, and Disclaimers . ... Publications with keywords: Moon - halo - ice crystals . Publications with words: Moon - halo - ice crystals . ...

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• Астронет > A Halo Around the Moon
• XWare > APOD

... A clear description of El Nino Southern Oscillation and of its consequence on climate in Australia and South America is available at El Nino or ENSO theme pages of the NOAA climate diagnosis center. ( historical comparison of previous elninos with soi indices ) . This image shows cold water upwelling near the coast of Peru (purple) and joining the South Equatorial Current, which flows westward across the Pacific Ocean. ... July 16, 1998 : Satellite image shows pacific stabilizing . ...

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• ArtistтАЩs impression of the expected dark matter distribution around the Milky
• Data package cover sheet: 079.D-0645A / 2007-05-15
• the Technical Archive procedure for issue of documentation

... The task calculates an average RMF over the spatial region used to extract the source spectrum. ... Essentially a grid is placed over the source region and the redistribution parameters calculated at each point. ... By means of command line parameters the averaging may be performed assuming that the flux distribution is that of the point spread function (PSF), a flat uniform distribution or it may be defined explicitly by supplying the task with an image containing the source region. ...

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• Bottom-up explanation:
• Parameters

A blind survey for compact HII regions at 20 GHz Tara Murphy Ron Ekers, Martin Cohen, Anne Green 9th September 2010 AT20G UCHII 2 The Australia Telescope 20 GHz Survey (AT20G) Covers southern sky ( < 0 ) S20 40 mJy Follow-up at 20, 8 and 5 GHz Carried out from 2004 to 2008 3000 hours of observing Main aims were: Population characterisation Spectral index distribution Variability studies Polarisation Extended sources Murphy et al., 2010, MNRAS, 402, 2403 Massardi et al., ...

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• Peter Kamphuis
• The group around NGC 3263 / NGC 3256
• The derived luminosity and spatial distributions

... cal values . ... 13jan13: calibration results: jun12-dec12. updated pointing offset. 26may08: cal values measured using sky and absorber. may04-sep04: sbw GAIN CURVES. may04-sep04: System performance of data used for gain curves. 09jul04: cal values measured using sky and absorber . ... 20jan11: rfi appears at 2380 Mhz. 07jun05: time for sbw dewar to cool down. 09may03: resonances in the sbw receiver. ... Gain curves were fit to the sband wide calibration gain data using 15may04 through 01sep04. ...

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• dewar monitoring glitches
• Jodrell Multi-beam Virgo Survey
• Searching the Environment around LyAlpha Absorbers

Next: Preface Up: Contents Previous: Contents . Cover Illustration: Two B- band images of the Phoenix dwarf galaxy at different epochs ( top ), and the difference of the two using new software to register and scale the images ( bottom left ) and to match their PSFs ( bottom right ). In the fully matched case about a dozen Cepheid variables are readily apparent, as is one high proper-motion star just below and left of center. ...

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• ADASS VI Cover Page
• Preface
• ADASS VIII Cover Illustration

... 2008 December 7 . A Halo Around the Moon . ... Explanation: Have you ever seen a halo around the Moon? This fairly common sight occurs when high thin clouds containing millions of tiny ice crystals cover much of the sky. ... Because most of the crystals have a similar elongated hexagonal shape, light entering one crystal face and exiting through the opposing face refracts 22 degrees, which corresponds to the radius of the Moon Halo . ... About APOD | ... A service of: ASD at NASA / GSFC . ...

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• APOD: 2012 November 20 - A Halo Around the Moon
• APOD: 2003 April 21 - A Halo Around the Moon
• APOD: 2000 May 15 - A Halo Around the Moon

Neutral hydrogen distribution in the region of radio source Cygnus X . ... HI distribution in the region of radio source Cygnus X and supernova remnant G78.2+2.1 has been investigated from observations in 21 cm radio line using radio telescope RATAN-600. ... The existance of the large HI shell and a cavity in molecular gas distribution around Cygnus X indicates this radio source most probably to represent a united structure and whole gas may be drived by stellar wind of Cyg OB2 stellar assotiation. ...

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• Spectral energy distribution
• Results scientific researchs LRS
• Linux Device Drivers, 2nd Edition: Bibliography

Next: Structure of the Galaxy Up: Model of the Galaxy Previous: Model of the Galaxy . As discussed above (Section? 6 ), galactic binary systems are assumed to be distributed logarithmically along their semi-major axis A (Abt and Levy, 1976[ 2 ]), . ... Figure 40: Number of binary stars per frequency decade. ... As the observed distribution of binary periods is flat (equation ( 15.3.1 )), the normalization constant is the total number of galactic binaries per frequency decade: . ...

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• No Title
• Initial Distributions of Binary Parameters
• Initial velocity

FEATURES OF THE HYDROGEN DISTRIBUTION AROUND LUNAR CRATERS PROCLUS AND KEPLER. ... In result of analysis of the data Lawrence and Feldman constructed the hydrogen distribution on the lunar surface [1]. ... However, the authors shown, that EN flux data features may be explained by other element abundance in the lunar soils, namely: Si, Ca, Gadolinium (Gd), Samarium (Sm) and Fe. ... Using of the Feldman's interpretation of the Lunar Prospector data [8], we constructed hydrogen distribution map (Fig.1). ...

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• http://selena.sai.msu.ru/Shev/Publications/m44_75_shevchenko_etal.pdf
• http://selena.sai.msu.ru/Symposium/ant.doc
• http://selena.sai.msu.ru/Symposium/ant.pdf

... title=' Швейцарские наручные женские часы Cover CO180.05. Коллекция Amora - Cover - Cover' border='0' align='left' width='120' style='margin-right: 20px;' hspace='7' vspace='5'/> Кварцевые часы. ... Уютная детская пижама Трон-плюс, состоящая из джемпера и брюк, идеально подойдет вашему ребенку и станет отличным дополнением к детскому гардеробу. ... В такой пижаме ваш ребенок будет чувствовать себя комфортно и уютно во время сна. ... Коллекция: Осень-зима 2015/2016 . ... Пол: Женский . ...

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• Швейцарские наручные женские часы Cover CO125.13. Коллекция Ladies - Cover -
• Helmet cover flecktarn-desert - ASMC - ASMC Шлепанцы женские Havaianas STen
• Аксессуар Чехол APPLE iPad Air Smart Cover Pink MGXK2ZM/A Потайной винт

General Information * ============================================================================ Title : WAD.WAD V1.1 (Waste And Destroy) Author : Johnnie Chan and Simon Griffin Email Address : ma2jswc@bath.ac.uk and ee2smg@bath.ac.uk Additional Credits to : The authors of DOOM, DEU, and BSP. ... Play Information * ============================================================================ Episode and Level # : E1M1 Single Player : Yes Cooperative 2-4 Player : Yes - works very well two player. ...

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• E.V.Kononovich
• Installing the System

FAMILIES AND SCATTERING . ... An important observation on the orbital distribution of irregular satellites is that satellite families at Saturn, Uranus and Neptune are not well defined. At Jupiter one finds 3-4 reasonably compact retrograde families, corresponding to each of the previously known retrograde irregulars and one prograde family. ... That is contrary to the current doctrine that very little has happened to these irregular satellite families following their collisional formation. ...

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• Flare Dynamics
• Armagh Observatory
• Solar Eclipse Friday 1 August 2008 | International Year of Astronomy in Ireland

... The author of the cover picture is Vasilisa Verkhodanova. The picture symbolizes our perception of the world. The modified emblem of the SAO unifying the 6-m optical telescope and the raditelescope RATAN-600 of SAO RAS is placed in the center of the radio galaxy isophotes. From the one hand, we can investigate the properties of radio galaxies with these (and other) telescopes, and try to study physical processes providing their activity. ...

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• Description of SED models