... Bad Astronomy . ... Bitesize Astronomy . ... Have you ever looked at pictures of Saturn's rings and noticed what look like gaps in the rings? ... Gian Domenico Cassini discovered a large gap in Saturn's rings in 1675. Later, an astronomer named Encke discovered a smaller gap near the edge of the rings. ... It was found long ago that an orbit in the Cassini Division, as the large gap is named, has a period almost exactly one-half that of one of Saturn's moons named Mimas. ... 2008 Phil Plait. ...

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... ATNF Home . ... About ATNF overview . News | ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . ... Mopra radio telescope . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... Now, new Australia Telescope observations of the polar ring galaxy NGC 4650a suggest that the dark matter in this galaxy lies in a flattened distribution aligned with the polar ring. ...

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• Fitting a tilted ring model to a warped galactic disk
• New HI Observations of the Prototype Polar Ring Galaxy NGC 4650A
• Ring Galaxies

... ESO, the European Southern Observatory . ... Survey Telescopes . ... ALMAтАЩs Long Baseline Campaign has produced a spectacularly detailed image of a distant galaxy being gravitationally lensed, revealing star-forming regions тАФ something that has never seen before at this level of detail in a galaxy so remote. ... The left panel shows the foreground lensing galaxy (observed with Hubble), and the gravitationally lensed galaxy SDP.81, which forms an almost perfect Einstein Ring, is hardly visible. ...

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• Montage of the SDP.81 Einstein Ring and the lensed galaxy
• The Einstein Ring SDP.81 seen with ALMA
• A Gravitational Einstein Ring

... A Bulls Eye Einstein Ring . ... Credit: L. J. King ( U. Manchester ), NICMOS , HST , NASA Explanation: Can one galaxy hide behind another? ... Here the foreground galaxy acts like a huge gravitational lens , pulling the light from the background object around it, keeping it visible. ... Publications with keywords: gravitational lens - ring . Publications with words: gravitational lens - ring . ... Dark Matter Ring Modeled around Galaxy Cluster CL0024 17 . ... Abell 2218: A Galaxy Cluster Lens . ...

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• SDSSJ1430: A Galaxy Einstein Ring
• A Horseshoe Einstein Ring from Hubble
• Астронет > SDSSJ1430: A Galaxy Einstein Ring

... 2008 July 28 . SDSSJ1430: A Galaxy Einstein Ring . Credit: A. Bolton ( UH/IfA ) for SLACS and NASA / ESA . Explanation: What's large and blue and can wrap itself around an entire galaxy? A gravitational lens mirage. ... Since such a lensing effect was generally predicted in some detail by Albert Einstein over 70 years ago , such rings like SDSSJ1430 are now know as Einstein Rings . ... Tomorrow's picture: wet galaxy . ... About APOD | ... NASA Web Privacy Policy and Important Notices . ...

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• APOD: 2011 December 21 - A Horseshoe Einstein Ring from Hubble
• APOD: March 30, 1998 - A Bulls Eye Einstein Ring
• APOD: 2014 August 13 - Rings Around the Ring Nebula

... According to the most popular cosmological paradigm, the greater part of the galaxy mass is accumulated in the dark matter halo. ... The polar ring galaxies (PRGs) reveal external rings or disks of gas, dust and stars rotating in a plane roughly perpendicular to the disk of the central galaxy. ... The shape of the dark halo in the model was chosen so as to achieve the best fit to the observed rotation of both galaxies themselves and their polar rings. ... The SPRC-7 galaxy. ...

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• New Polar Ring Galaxies

... It would be the ultimate backpacking trip: an exploration of Saturn's rings. ... The partly hidden Sun glinting off the field of ring chunks, the gentle gravitational symphony of collective motion that carries both chunks and explorers safely around the planet, the feeling of being surrounded yet freely floating -- all disguise the fact that everything is whirling around Saturn at tens of thousands of kilometers per hour. ... Dark side of the ringed planet. ... The rings are enormous. ...

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• ASP: Rings of Creation
• ASP: Astronomy in the News
• ASP: Guest Observer

... The ring current (e.g., Frank, 1967) consists of geomagnetically trapped 10 - 200 keV ions (mainly H + , He + , and O + ) and electrons that drift azimuthally around the Earth at radial distances of about 2-7 Re (Earth radii), overlapping the radiation belt region. ... This index can be used to monitor the development of geomagnetic storm (see also geomagnetic activity ), as the main signature (actually definition) of the storm main phase is the build-up of an enhanced ring current. ... Res., ...

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• Saturn Picture List
• Saturn's Small Moons
• Geomagnetic storms [Oulu]

. [ ENGLISH ] [AUTO] [KOI-8R] [WINDOWS] [DOS] [ISO-8859] . Next: . Рецензия . Текстовый файл романа . Zip файл романа MDKW.zip . Вл.Хлумов . (интеллигентская хроника) . About this document ... Lipunov V.M. Tue Feb 3 15:34:31 MSK 1998

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Computer Ephemeris. Ephemeris for physical observations of Saturnian rings. Explanations. ... semimajor axis of outer ring - a - (seconds), . ... planetocentric longitude of the Earth minus 180 o - U - (degrees) . ... position angle of semiminor axis of the rings- P - (degrees) . ... heliocentric position angle of semiminor axis of the rings - P' - (degrees) . angular distance from ascending node of the rings on Earth's equator to ascending node of the rings on ecliptic- omega - (degrees) ...

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... Any object with either a raw count-rate > 60 or flagged as having a mod-8 pattern is considered to have produced a smoke-ring - any other source within or near to the smoke-ring is flagged. ... Compute the radial distance of the star (xstar, ystar) from the centre of the OM field of view (xCentre=1024.5, yCentre=1024.5) . ... Any source within a radius of 38 pixels is then flagged (the 38 was derived from an average radius of 26 + 12 photometry radius). ...

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• Smoke-ring Detection Algorithm

NGC 1097 is a nearby SBb galaxy with a Seyfert nucleus and a bright starburst ring. We study the physical properties of the interstellar medium (ISM) in the ring using spatially resolved far-infrared spectral maps of the circumnuclear starburst ring of NGC 1097, obtained with the PACS spectrometer on board the Herschel Space Observatory. ... We observe evidence of rapid rotation in the circumnuclear ring, with a rotation velocity of ~220 km s-1 (inclination uncorrected) measured in all lines. ...

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• Spitzer MIPS Infrared Imaging of M31: Further Evidence for a Spiral-Ring
• An Elliptical Ring Nebulosity Around Serpens/SVS 20: Circumbinary Disk or
• Multi-wavelength Evironment of AM0644-741

NATIONAL ASTRONOMY AND IONOSPHERE CENTER . ... Astronomy . ... Visitor Center . ... Planetary Radar . ... In fall of 1999 and 2000, the rings of Saturn were imaged using the Arecibo S-band radar system by P. Nicholson, D. Campbell, R. French, G. Black and J.-L. Margot. ... A delay-Doppler image of Saturn's rings at a frequency of 2380 MHz (12.6 cm) is compared to a model image constructed by reprojecting a pair of HST images taken at 439 nm. ...

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Astronotes Armagh Planetarium's Stellar Blog! ... Solar System . ... Moon . ... Comets and Asteroids . ... What changed our view of Chariklo is the discovery of a ring system around it, the first such feature found around a Solar System body smaller than a gas giant planet. ... Almost certainly the rings were born when a collision with a smaller asteroid blasted millions of tonnes of debris off CharikloтАЩs surface. ... A ring system detected around the Centaur (10199) Chariklo (Braga-Rigas et al.) ...

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• The bluffer?s guide to Saturn | Astronotes
• Saturns amazing rings | Astronotes
• Virgo | Astronotes

Stellarium 0.12.3 . ... Classes . ... Renderer . FileљStructure . ClassљList . ClassљIndex . ... Ring Class Reference . Ring (double radiusMin, double radiusMax, const QString &texname) . ... draw ( StelProjectorP projector, class StelRenderer *renderer, StelProjector::ModelViewTranformP transform, class StelGLSLShader *shader, double screenSz, ShadowPlanetShaderInfo *info) . Draw the ring. ... void Ring::draw . ... Used to determine whether we're above or below the ring. shader . ...

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• Stellarium: StelGeometryRing Class Reference
• Stellarium: RingParams Struct Reference
• Stellarium: StelGeometryBuilder Class Reference

... Бренд: Samsung . ... Микроволновые печи . ... Continuing the story of the Hobbit, this is the second part of Tolkien's epic masterpiece, the Lord of the Rings, featuring an exclusive cover image from the film, the definitive text, and a detailed map of Middle-earth. Frodo and the Companions of the Ring have been beset by danger during their quest to prevent the Ruling Ring from falling into the hands of the Dark Lord by destroying it in the Cracks of Doom. ... Цвет: серый . ...

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• Ботинки Reflex - Reflex - Reflex Светильник подвесной Arte Lamp Ring
• Разделочная доска - сервировочный коврик Ring Mondri - PO: Selected - PO:
• Разделочная доска - сервировочный коврик Ring Bird Nest (дисконт) - PO - PO

... In order to disentangle the effects of different climate variables on tree-ring growth rates of different species, and to explore the possibility that more than one species could improve the accuracy of the reconstructions of climate using tree rings, a methodical study of trees in close proximity to the Armagh Observatory climate station was initiated together with Ana Maria Garc?a Su?rez, and continued as part of the latter's PhD thesis with John Butler and Professor Mike Baillie (QUB). ...

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• Proxy Climate Indicators Using Tree Ring Widths
• Total Solar Eclipse from Turkey 2006
• A Statistical Study of the Relationship between the Solar Cycle Length and

The picture above was made with this demo POV file and this towel ring object POV file . This is a ring from which hand towels could be hung (if you had one handy). The "base" (the top, really) sits at the origin, and has a diameter of 2.6 units. The ring has a major radius of 3.5 units, and a minor radius of 0.2 units. ... This web page, the associated image(s), and POV files are all copyright 2004 by Thomas A. Fine (that's me!) ... WARNING: This POV object is based on a real object. ...

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• The AstroStat Slog O-ring
• Introduction

... Press Release Images . Individual Images . ... The right-hand image shows Hubble's close-up view of the galaxy's core, taken in December 1995 by the Wide Field and Planetary Camera 2. The bluish-purple clumps that form the ring are the clusters of infant stars. Two dark, wispy lanes of dust and a pair of blue spiral arms are just outside the star-forming ring. ... The gas is trapped inside the ring through the stars' gravitational attraction. ... Amazing Space | ...

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• Double Ring Basin
• New Satellites of Saturn
• Jupiter's Moon Adrastea

Изображенный радиоисточник MG 1131+0456 имеет совершенно необычную структуру: сглаженное, с низкой поверхностной яркостью кольцо, соединяющее 2 почти диаметрально расположенных компактных источника, причем оба сдвинуты к юго-западу. ... В этом случае MG 1131+0456 наблюдается как "Эйнштейновское кольцо" в частично симметричном случае гравитационного линзирования, впервые предложенного Эйнштейном в 1936. Рисунок воспроизведен с буклета NRAO ( http://www.nrao.edu ). vo @ sao.ru ( Oleg Verkhodanov ) . ...

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