Saturn: the "Ringed Beauty" and His Moons
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TITAN-2.jpgCrescent Titan (possible True Colors; credits: Calvin J. Hamilton)53 visiteVi invitiamo a leggere, sul nostro blog TruePlanets, la prima parte della Monografia su Titano "Oltre la Nebbia", scritta dal Dr Paolo C. Fienga.
Un tentativo - si spera riuscito - di riassumere in un quantitativo ragionevole di pagine le ultime scoperte relative alla Luna Nebbiosa.
Nella prima parte, un pò di Storia, di Geografia e di Meteorologia, ed una serie di riflessioni dedicate ai "Colori di Titano" (perchè non esistono solo i "Colori di Marte"...).
In seguito (parte seconda), la Geografia di dettaglio di Titano, con cenni alla sua Storia Geologica ed alla possibile evoluzione; nella parte terza, infine - pubblicazione prevista nel Marzo 2009 - qualche ipotesi sugli scopi e le modalità di colonizzazione dello Spazio Profondo...
Buona Lettura!MareKromium
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TITAN-N00006513.jpgTitan from Cassini-Huygens - app.x 340.000 Km away53 visitenessun commento
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TITAN-N00006531.jpgTitan from Cassini-Huygens - app.x 340.000 Km away53 visitenessun commento
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TITAN-N00006532.jpgTitan from app.x 340.000 Km away - Lightnings on Titan or a scratch in the picture?54 visitenessun commento
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TITAN-PIA06081_modest.jpgTitan in true colors (from Cassini/Huygens)54 visitenessun commento
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Tehys-N00110912.jpgTethys in the Saturnshine!55 visitenessun commentoMareKromium
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Tehys-PIA07693.jpgOdysseus54 visiteOriginal caption:"Plunging cliffs and towering mountains characterize the gigantic impact structure called Odysseus on Saturn's moon Tethys. The great impact basin lies before the Cassini spacecraft in one of the best views yet obtained.
Quite a few small craters are visible inside Odysseus (450 Km - or 280 miles across), making it clear that this is not a very young structure. However, a comparison of cratering density between the interior of Odysseus and the surrounding terrain should show whether the large basin is at least relatively young.
Odysseus lies on the Leading Hemisphere of Tethys; North is up and rotated 18° to the right.
The image was taken in polarized ultraviolet light with the Cassini spacecraft narrow-angle camera on Dec. 24, 2005 at a distance of approx. 196.000 Km (about 122.000 miles) from Tethys and at a Sun-Tethys-spacecraft, or phase, angle of 85°. Resolution in the original image was about 1 Km (3,831 feet) per pixel. The image has been magnified by a factor of two and contrast-enhanced to aid visibility".
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Telesto-N00041270.jpgTelesto87 visiteOriginal caption:"N00041270.jpg was taken on October 11, 2005 and received on Earth October 12, 2005. The camera was pointing toward TELESTO at approx. 19.676 Km away; this image was taken using the CL1 and CL2 filters. This image has not been validated or calibrated
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Telesto-N00041282.jpgTelesto55 visiteOriginal caption:"N00041282.jpg was taken on October 11, 2005 and received on Earth October 12, 2005. The camera was pointing toward TELESTO at approx. 15.409 Km away; this image was taken using the P0 and GRN filters. This image has not been validated or calibrated".
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Telesto-N00041291.jpgTelesto54 visiteOriginal caption:"N00041291.jpg was taken on October 11, 2005 and received on Earth October 12, 2005. The camera was pointing toward TELESTO at approximately 12,230 kilometers away, and the image was taken using the CL1 and CL2 filters. This image has not been validated or calibrated".
Nota: ricordate il discusso Fly-By di Hyperion durante il quale questa piccola luna rimaneva completamente immobile durante l'avvicinamento di Cassini (vedi "Hyperion", di A. Feltri e P. C. Fienga su NEXUS)? Notate ora come Telesto, invece, cambi VISIBILMENTE posizione tra un frame e l'altro. Sarà perchè Telesto ruota su sè stesso molto più rapidamente di Hyperion o forse perchè Cassini ha diminuito la sua velocità di crociera?
O magari perchè queste immagini sono genuine e quelle del Fly-By di Hyperion non lo erano?...
Voi che dite?
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Telesto-N00041294.jpgTelesto54 visiteOriginal caption:"N00041294.jpg was taken on October 11, 2005 and received on Earth October 12, 2005. The camera was pointing toward TELESTO, at approx. 11.408 Km away; the image was taken using the CL1 and CL2 filters. This image has not been validated or calibrated".
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Telesto-N00047270.jpgTelesto54 visiteOriginal caption:"N00047270.jpg was taken on December 25, 2005 and received on Earth December 26, 2005. The camera was pointing toward TELESTO that, at the time, was approximately 20.919 kilometers away, and the image was taken using the CL1 and UV3 filters".
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