... Particle Sizes in Saturns Rings . ... Credit Copyright: RSS , JPL , ESA , NASA Explanation: What size particles compose Saturn's rings? To help find out, the robot Cassini spacecraft now orbiting Saturn broadcast radio waves of three different wavelengths right through the rings to Earth earlier this month. The experiment was sensitive to ring particle sizes because ring particles much larger than a broadcast radio wavelength will reflect those radio waves away. ... NASA Official: Jay Norris. ...

... ESO is building what will be the World's largest optical telescope array, The Very Large Telescope (VLT). The VLT Project organisation is responsible for the design and construction of the Unit Telescopes, including enclosures, optics, adapter-rotators and coating unit. ... Unit Telescopes Overview - This page is outdated, an update is in process. ... Secondary mirror (M2 Unit) - This page is outdated, an update is in process. ... Coating Unit - This page is outdated, an update is in process. ...

... 2013 July 10 . Large Sunspots Now Crossing the Sun . ... Explanation: One of the largest sunspot regions in recent years is now crossing the Sun. This region of convoluted magnetic fields may well produce a solar flare that releases a cloud of energetic particles into the Solar System. ... The darkest sunspot regions contain nearly vertical magnetic fields and are called umbras, while the surrounding bronze regions -- more clearly showing stringy magnetic flux tubes -- are called penumbras. ...

Enceladus . ... Enceladus [en-SELL-ah-dus] is one of the innermost moons of Saturn. ... Parts of Enceladus shows craters no larger than 35 km in diameter. ... This Voyager 2 mosaic of Enceladus was made from images taken through the clear, violet and green filters on August 25, 1981, from a distance of 119,000 kilometers (74,000 miles). ... This image was created by projecting a digital map of Enceladus onto an orthographic view and then replacing the color channels by low resoultion color images. ...

Henize 206 is a region of star formation in the Large Magellanic Cloud of the approximate scale of the Orion belt and sword. Our Spitzer Space Telescope infrared images and Cerro Tololo Inter-American Observatory (CTIO) optical images show that the region is experiencing very energetic star formation. ... A few percent of the total flux from this brightest region in Henize 206 emanates from infrared peaks of subparsec scale. ...

Enceladus . Saturn II . Enceladus [en-SELL-ah-dus] is one of the innermost moons of Saturn. ... Parts of Enceladus shows craters no larger than 35 km in diameter. ... This Voyager 2 mosaic of Enceladus was made from images taken through the clear, violet and green filters on August 25, 1981, from a distance of 119,000 kilometers (74,000 miles). ... Some regions of Enceladus show impact craters up to 35 kilometers (22 miles) in diameter, whereas other areas are smooth and uncratered. ...

... 2 April 1999 . The Nobeyama Radioheliograph data show that in the microwave range, besides large-scale trans-equatorial chains (see, e.g., the May 11-15, 1993 and November 1-4, 1993 events), there are also many examples displaying large and strongly evolving "longitudinal" or "internal" chains connecting remote active regions inside an active zone in one (northern or southern) hemisphere (the August 20-September 3, 1998 event). ... Last update: 2 April 1999 . ...

Four spacecraft: INTERBALL Tail probe (IB_TAIL), Auroral probe (IB_AUR), POLAR(NASA/ISAS), GEOTAIL (NASA) are considered. ... Orbital ASCII files | ... four spacecraft . ... INTERBALL . Tail Probe . ... ASCII files . ... Auroral probe . ... NASA) . ... NASA, ISAS) . ... The four spacecraft . ... INTERBALL mission | ...

In order to measure the density of the Universe, it is necessary to sample a region that is larger than the scale on which the Universe becomes approximately homogeneous. ... When applied to clusters of galaxies we find a mass to luminosity ratio that implies a density of the Universe that is about 0.3 times the critical density. ... Thus the mass-to-muinosity ratio appears to vary with the size of the region measured, from 3 in the solar neighborhood to 30 in galaxies to 300 in clusters of galaxies. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Solar System . ... Planets . ... This bizarrely shrunken planetary system was found by NASAтАЩs Kepler mission, hence the parent star has been named Kepler-11. ... Planetary scientist and Kepler science team member Jack Lissauer said ?These six planets are mixtures of rock and gases, possibly including water.тАЭ €аNone of these strange new worlds are likely to be home to any form of life; their surface conditions are simply too extreme. ...

... Samara region . SSAU History . ... An alignment meeting on data mining, storage and processing of very large data amounts on the basis of hardware and software complex Big Data took place in Samara State Aerospace University. ... The laboratory for processing of very large data amounts on the basis of the hardware and software complex was made in the University and the necessary equipment was purchased. ... Data processing requires powerful processors and advanced computer programs. ... Big Data. ...

GALAXIES cenA .tiff 40 Bright Radio Galaxy M31.tiff Nikon Andromeda Galaxy (note HII regions in spiral arms) ngc6744.tiff 40 NGC 6744 a face-on spiral clouds_20d.tiff H'blad The Magellanic Clouds our nearest neighbours Lmc_7.tiff Nikon The Large Magellanic Clouds Lmc_zoom.tiff Nikon Detail of previous image smc_7.tiff Nikon The Small Magellanic Clouds smc-zoom.tiff Nikon Detail of previous image 30dor_40_BVR.tiff 40 The 30 Dor ... B [OIII] Halpha trifid.tiff 40" The Trifid Nebula. ...

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For particles of very large sizes, scattering can be considered as a result of interference of the rays having multiple reflections and refractions according to the laws of geometrical optics. ... The papers [ 413 , 414 ] presented a method where the scattering field was expressed via the field at the particle surface using the Huygens-Kirchhoff principle, and reflection and refraction laws were employed to find the unknown field (the approach was called physical optics approximation). ...

Next: *imcopy* - Compress an Up: Image Manipulation Previous: Image Manipulation . input file: rp90_a.imh . ... xr> images # need this package im> imcopy rp90_a[200:263,282:345] rp90_aa # extract 64x64 region from .imh file rp90_a[200:263,282:345]-->rp90_aa . ... As an example we make an input file for the smoothing task which needs small arrays or it takes too long to run. im> imcopy xdata$rp110590.qp[6830:7029,9290:9489] rp90_ab.imh # extract 200x200 region from the .qp file . ...

... Rough topography, a large mountain, impact craters, grooves, and steep scarps characterize this region. ... Dawn Science Team Presents Early Science Results . ... Scientists with NASA's Dawn mission are sharing with other scientists and the public their early information about the southern hemisphere of the giant asteroid Vesta. ... If you enjoyed this excerpt from a feature article and would like to receive our quarterly Mercury magazine, we invite you to join the ASP and receive 4 issues a year. ...

... Day-by-day lines contain complete set and intended for those who have been there (I mean, in Kyoto :) . ... Large format is mainly for 1600x1200 screens and fast link (pictures are up to 150K in size). Normal is for typical 1024x768 screen (i.e. 15" monitors). ... Photos look incredible on it. ... Large . ... Normal . ... Thumbnails . ... Contents with thumbnails: Large | ... Nara, one of the historical cities of Japan . ... August 17, Sunday. ... Nara. ... return to photo album contents | ...

... We have studied scaling relations (virial mass versus CO luminosity, luminosity versus size, linewidth versus size) for molecular clouds in the 30 Dor and N 159 regions in the Large Magellanic Cloud. ... The study of molecular clouds in the Galaxy has resulted in a number of scaling relations between global cloud properties such as mass, density, luminosity, size and velocity dispersion (e.g. Larson (1981) , Scoville & Sanders (1987) , Solomon et al. ... Elmegreen B.G., 1989, ApJ , 338 , 178. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... September Perseid meteors captured by the . ... Its occurrence provides astronomers with interesting new data about the hidden trails of meteoroids тАФ small bodies ranging in size from fine dust particles to objects of marble-size and larger тАФ in the solar system and their supposed sources: comets and asteroids passing through the inner solar system. ... The particular comet that created the September Perseids is unknown...

... A detector map is used to provide a grid of positions over which to calculate and flux weight the ARF. The default detector map is 'flat' which has a weighting of 1.0 for each detector map pixel and is rectangular having sides which just encompass the region specified in the DSS. Only detector map pixels falling within the source region are included in the ARF calculation, e.g. for a circular source box, the pixels in the corners of the detector map will be ignored. ... flat : . ...