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The_Rings-PIA08845.jpgThe strange appearence of the F-Ring62 visiteCaption NASA:"The striated appearance of the F-Ring is immediately apparent in the region of the ring that trails behind the moon Prometheus. The F-Ring is characterized here by dark gores that stretch inward toward the planet and forward in the direction of motion.
This image has been expanded in the horizontal direction by a factor of 5 in order to make radial variations more prominent.
The curvature of the Rings is also exaggerated by the horizontal stretch.
The exterior flanking ringlets (to the right of the bright ring core) are not disturbed by Prometheus to the great degree seen in the inner ringlets. This view looks toward the unlit side of the Rings from about 31° above the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Nov. 25, 2006 at a distance of approx. 1,7 MKM (about 1,1 MMs) from Saturn and at a phase angle of 162°. Scale in the original image is roughly 10 km per pixel".MareKromium
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Enceladus-N00075253.jpgThe light colors of Enceladus (elab. Lunexit)62 visitenessun commentoMareKromium
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Craters-Unnamed_Crater-S16-01-140-03.jpgFresh Crater near Ulysses Patera (Natural Colors; credits: NASA/MGS/MSSS)62 visiteCaption NASA originale:"Ths frame has been colorized using a look-up table derived from the Colors of Mars as seen by the Mars Reconnaissance Orbiter’s High Resolution Imaging Science Experiment (HiRISE) camera".MareKromium
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B-h0032_0000_ir3-00.jpgFrame Mars Express RAW n. h0032_0000_ir362 visite
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Psp_001503_2180_red-01.jpgTricks of the Light, Tricks of the Surface... (extra-detail mgnf - 2)62 visitenessun commento
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as09-19-2951.jpgAS 09-19-2951 - Floating Away...62 visitenessun commento
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APOLLO_12_AS_12-57-8455_HR.jpgAS 12-57-8455 (HR) - Soil surface NOT greatly disturbed by the LM descent engine exhaust62 visitenessun commento
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APOLLO_12_AS_12-57-8454_HR.jpgAS 12-57-8454 (HR) - Soil surface NOT greatly disturbed by the LM descent engine exhaust62 visitenessun commento
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AuroraBorealis-Alaska.jpgAurora over Alaska62 visiteCaption NASA:"Higher than the highest mountain, higher than the highest airplane, lies the realm of the aurora. Aurora rarely reach below 60 Km, and can range up to 1000. Aurora light results from solar shockwave causing energetic electrons and protons to striking molecules in the Earth's atmosphere. Frequently, when viewed from space, a complete aurora will appear as a circle around one of the Earth's magnetic poles. The above digitally enhanced photograph was taken in 2005 January shows a spectacular aurora borealis above the frozen landscape of Bear Lake, Alaska, USA.
The above image was voted Wikipedia Commons Picture of the Year for 2006".
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The_Evaporating_Planet.jpgWater Claimed in Evaporating Planet HD 209458b62 visitePlanet HD 209458b is evaporating. It is so close to its parent star that its heated atmosphere is simply expanding away into space. Some astronomers studying this distant planetary system now believe they have detected water vapor among the gases being liberated. This controversial claim, if true, would mark the first instance of planetary water beyond our Solar System, and indicate anew that life might be sustainable elsewhere in the universe. HD 209458b is known as a hot Jupiter type system because it involves a Jupiter-type planet in a Mercury-type orbit. Although spectroscopic observations from the Hubble Space Telescope are the basis for the water detection claim, the planetary system is too small and faint to image. Therefore, an artist's impression of the HD 209458b system is shown above. Research into the atmospheric composition of HD 209458b and other extrasolar planets is continuing.MareKromium
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OPP-SOL1157-1R230899564EFF815WP1301R0M1-00.jpgPossible "Transient Event" on Mars (1) - extra detail mgnf (Sol 1157)62 visiteUna svista? Un dettaglio irrilevante? O forse la "cristallizzazione" in un frame from Mars di un reale Evento Transitorio?
Innanzitutto, congratulazioni e complimenti al Dr Gianluigi Barca per la possibile scoperta e, comunque, per l'occhio dimostrato! Per il resto...andiamo a vedere il detail mgnf...MareKromium
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Io-050107_04.jpgPlanetary Flares62 visiteThis montage demonstrates New Horizons' ability to observe the same target in complementary ways using its diverse suite of instruments. Previously released views taken at visible and slightly longer infrared wavelengths with the Long Range Reconnaissance Imager (LORRI), New Horizons’ high-resolution black-and-white camera, and the Multispectral Visible Imaging Camera (MVIC), its color camera, are here compared with a nearly simultaneous view from the Linear Etalon Imaging Spectral Array (LEISA), which observes its targets in more than 200 separate wavelengths of infrared light. This color LEISA view of Io (bottom right) combines three wavelength ranges, centered at 1.80, 2.04, and 2.31 micrometers.
The LORRI image (left) shows fine details on Io's sunlit crescent and in the partially sunlit plume from the Tvashtar volcano, and reveals the bright nighttime glow of the hot lavas at the source of the Tvashtar plume. The MVIC image (top right) shows the contrasting colors of the red lava and blue plume at Tvashtar, and the sulfur and sulfur dioxide deposits on Io's sunlit surface. The LEISA image shows that the glow of the Tvashtar volcano is even more intense at infrared wavelengths and reveals the infrared glow of at least 10 fainter volcanic hot spots on the moon’s nightside. The brightest of these, Amirani/Maui, which is visible to the lower right of Tvashtar, is less than 4% as bright as Tvashtar. All of these are long-lived hot spots that have been observed previously by the Galileo orbiter. Further analysis of the LEISA data will provide information on the volcanoes’ temperatures, and data on the sunlit crescent of Io will reveal details of Io's surface composition.
The LORRI, MVIC and LEISA images were taken March 1, 2007, at 00:35, 00:25 and 00:31 Universal Time, respectively, from a range of 2,3 MKM (about 1,4 MMs).
The images are centered at Io coordinates 4° South and 164° West.MareKromium
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