... Particle Sizes in Saturns Rings . ... Credit: 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. ...

Еще в разделе: (Показать все результаты (>125065) - www.astronet.ru/ )

• Астронет > Particle Sizes in Saturns Rings
• Journal "Peremennye Zvezdy"
• XWare > APOD

... Particle Sizes in Saturn's Rings . ... Explanation: What size particles compose Saturn's rings? ... The experiment was sensitive to ring particle sizes because ring particles much larger than a broadcast radio wavelength will reflect those radio waves away. ... The white center of Saturn's B-ring indicates that the density of ring particles was too high to make a good determination. Other radio observations indicate that some ring particles can be as large as several meters across. ...

Еще в разделе: (Показать все результаты (>8294) - www.sai.msu.su/ )

• APOD: 2013 July 10 - Large Sunspots Now Crossing the Sun
• APOD: 2004 July 26 - A Large Active Region Crosses the Sun
• APOD: June 20, 1999 - A Very Large Array of Radio Telescopes

... 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 Unit Telescopes Overview - This page is outdated, an update is in process.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 Secondary mirror (M2 Unit) - This page is outdated, an update is in process.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 Coating Unit - This page is outdated, an update is in process. ...

Еще в разделе: (Показать все результаты (>66155) - www.eso.org/ )

• ESO - The European ELT
• Panning across the star formation region NGC 6559 | ESO
• N44 in the Large Magellanic Cloud (Central Region)

We investigate the effects of dust on Large Magellanic Cloud (LMC) H II region spectral energy distributions using arcminute-resolution far-ultraviolet (FUV), HЮБ, far-infrared (FIR), and radio images. Widely used indicators of the amount of light lost to dust (attenuation) at HЮБ and in the FUV correlate with each other, although often with substantial scatter. ... ADS Citation Query . citations = 34 . citations vs. year [year,citations] . ...

Еще в разделе: (Показать все результаты (>14791) - www.stsci.edu/ )

• Infrared Imaging of the Large Magellanic Cloud Star-forming Region Henize 206
• Spitzer View of Young Massive Stars in the Large Magellanic Cloud H II Complex
• Dust Emission from Evolved and Unevolved H II Regions in the Large Magellanic

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. ...

Еще в разделе: (Показать все результаты (>9573) - www.arcetri.astro.it/ )

• APOD: 2000 September 25 - AR 9169: A Large Sunspot
• A collection of images
• Dust evolution across the CO snowline in a protoplanetary disk

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. ...

Еще в разделе: (Показать все результаты (>861) - www.iki.rssi.ru/ )

• The Earth's Magnetosphere
• Titan
• Jupiter's Moon Ganymede

... 11 Yellow-Green (78% transmission): Contrasts well with the red and blue characteristics of surface features on Jupiter and Saturn. ... 82A Light Blue (73% transmission): Useful on the Moon, Mars, Jupiter, and Saturn, this subtle pale blue filter enhances areas of low contrast while avoiding significant reduction of overall image brightness. ... Meade Series 4000 Photo-Visual Color Filters may be ordered individually or in the following sets: . ... Meade Series 4000 Broadband Nebular Filters . ...

Еще в разделе: (Показать все результаты (>2474) - www.meade.com/ )

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. ...

Еще в разделе: (Показать все результаты (>672) - www.mso.anu.edu.au/ )

• Comparison of simulations with the large scale radio galaxy M87.
• Julie Banfield | Astronomer

True Color Image Gallery: Galactic SNR | Magellanic Cloud SNR . ... The SNR 0500-702 is the northern object, The larger southern object is an HII region. ... Radio Images Page: not availabe . Link to Green's Catalog page . ... Exposure uf . ... Exposure uf Exposure time of unfiltered event file . Exposure f Exposure time of filtered event file . ... Event 2 FITS File . ... AUX file . ... 0.3 - 10.0 . ... see fit detail page for more about the fit. see chandra spectrum page for region used. ...

Еще в разделе: (Показать все результаты (>4101) - hea-www.harvard.edu/ )

• Chandra Images for G065.7+01.2
• Chandra Images for G039.7-02.0W
• Chandra Images for G119.5+10.2

. Fig. 4. The GOES-6 soft X-ray plot (a) and modified Nobeyama radio heliograms (b-e) of November 1-2, 1993 illustrating the transient large-scale chain activity following the C3.2 LDE event in the region 4 indicative of a CME. Back to paper .

Еще в разделе: (Показать все результаты (>590) - www.izmiran.rssi.ru/ )

• Oct-Nov 2003
• LARGE-SCALE PHENOMENA AT THE SUN ASSOCIATED
• Chains and CMEs

... Most of the time large telescopes are collecting light for a spectrograph, which spreads the light out into a rainbow. ... Atoms in the cool outer layers of a star absorb light coming from the hotter regions within, producing dark absorption lines across the spectrum. ... And astronomers do not actually use color film to take a color picture of the spectrum, for several reasons: . ... Color film does a very poor job of representing the continuous range of colors in a spectrum. ... Tutorial: Part 1 |...

Еще в разделе: (Показать все результаты (>2289) - www.sao.ru/ )

• Density Determination
• A 1.4 GHz Survey in the Southern ELAIS Region
• THE MOLONGLO RADIO SOURCE CATALOGUE 4: MC4

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Australia Telescope Online Archive (ATOA) . ... Parkes | ... Australia Telescope 20GHz Survey . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... The Secret Inner Life of the Orion Nebula . ...

Еще в разделе: (Показать все результаты (>16168) - www.atnf.csiro.au/ )

• The Puzzle
• ATLAS: Australia Telescope Large Area Survey
• giant_radio_galaxies

... Three day radio-astronomical forecast of the proton activity of the Sun: The figure shows multiwave radio emission scans - graphs of the distribution of intensity I and circular polarization V across the solar disk, obtained at RATAN-600. ... According to this criterion, for a proton flare to arise, the flux of radio emission must be sufficiently high at short wavelengths (blue color scans) and should increase with time compared to the general intensity. ... More about the solar activity . ...

Еще в разделе: (Показать все результаты (>305) - mavr.sao.ru/ )

• Metagalaxy sector, archive 2011
• Measurement of the dark halo shape in polar ring galaxies
• Solar system sector, archive 1993

Presented on Tuesday, January 7, 2003 . We construct a detailed longitude-velocity diagram through the actual midplane of the Galactic H I disk. The Galactic midplane definition is based on single-dish sky surveys, and the detailed l-v slice ( Fig. 1 ) is extracted from the Canadian Galactic Plane Survey ( CGPS ; Taylor et al. 2003 ). ... Note: other slices offset from this one were not shown in the AAS poster for lack of space, but they are available here . ...

Еще в разделе: (Показать все результаты (>4379) - www.naic.edu/ )

• The Tarantula Nebula
• First Galfa H I Map
• Frontiers of Astronomy with the World's Largest Radio Telescope Frontiers of

... A typical density of energetic ions is 1 per cubic cm., and the ions are matched by electrons, generally of lower energy. ... This region is almost empty of plasma--typical density 0.01 ion/cubic cm., the "best vacuum" in the Earth's vicinity--but it contains a relatively strong magnetic field which, since it fills a large volume, can store appreciable magnetic energy, Many believe that this is the storehouse from which substorms draw their energy, releasing it quite rapidly. ...

Еще в разделе: (Показать все результаты (>1495) - www.cosmos.ru/ )

• (S-6) Seeing the Sun in a New Light
• The Motion of Magnetically Trapped Particles -- History
• The Io Dynamo

... 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. ...

Еще в разделе: (Показать все результаты (>1588) - www.ssau.ru/ )

• Samara region

Ganymede is the largest moon in our solar system, larger even than the planets Pluto and Mercury. ... Ganymede's surface consists of two main types of terrain: old, dark polygonal units, and young, bright valleys and ridges (see figure 11 ). ... In a similar way, hitting a large block of ice with a hammer makes white marks. ... Ganymede as seen by Voyager 2. ... Because Voyager couldn't spot any large impact craters, scientists have concluded that the moon's surface is young. ... Moon . ... Europa . ...

Еще в разделе: (Показать все результаты (>1214) - www.astrosociety.org/ )

• ASP: Mercury Magazine
• ASP: Cosmic Collisions
• ASP: Beacons in the Gloom

.

Еще в разделе: (Показать все результаты (>419) - zebu.uoregon.edu/ )

• The Galaxy Gallery: Messier Objects
• Astro-2 and the UIT Experiment
• Fabry-Perot Images of Spiral Galaxies

... Team . ... V.V.Sokolov "The gamma-ray bursts, core-collapse supernovae and global star forming rate at large redshifts" . ... I.V.Sokolov, A.S.Moskvitin, Eda Sonbas, O.V.Verkhodanov, O.P.Zhelenkova "A galaxy cluster in the GRB 021004 field" . ... The monitoring of GRB afterglows and the study of their host galaxies with the SAO RAS 6-m telescope from 1997". ... A.S.Moskvitin, T.A.Fatkhullin, V.V.Sokolov and V.N.Komarova, "Spectral and photometric monitoring of CCSNe at SAO RAS" . ...

Еще в разделе: (Показать все результаты (>1099) - jet.sao.ru/ )

• RESEARCH PROBLEMS of the LRS
• Results scientific researchs 1
• Results scientific researchs 20

... 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. ...

Еще в разделе: (Показать все результаты (>493) - www.badastronomy.com/ )

• Phil Plait's Bad Astronomy: Misconceptions: The Not-Always-Red Planet
• Phil Plait's Bad Astronomy: Mad Science