| Piú votate - SOLAR SYSTEM |
Aeolian_Features-Windstreaks.jpgMagellan Probe: radio image of Windstreaks150 visiteUn'immagine decisamente chiara e relativa a quel fenomeno che viene chiamato 'wind streaking' e che ci indica, fra l'altro, la direzione usuale dei venti e la capacità di resistenza che i rilievi oppongono ad essi.
(15 voti)
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F-RING FROM VOYAGER-PIA02292_modest.jpgThe "F" Ring from Voyager 290 visitenessun commento
(10 voti)
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PHOEBE-PIA06074_modest.jpgPhoebe's Overview (3)76 visitenessun commento
(10 voti)
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PHOEBE-PIA06069_modest.jpgPhoebe's Fly-By (2)67 visitenessun commento
(10 voti)
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B-Mercury-PIA02418.jpgMercury: the "outgoing" hemisphere63 visiteCaption NASA originale:"This mosaic shows the planet Mercury as seen by Mariner 10 as it sped away from the planet on March 29, 1974. The mosaic was made from over 140 individual TV frames taken about two hours after encounter, at a range of 37.300 miles (60.000 Km ). North is at top. The limb is at right, as is the illuminating sunlight. The equator crosses the planet about two-thirds of the way from the top of the disc. The terminator - such as the line-separating day from night - is about 190° West longitude. The planet shows a gibbous disc-more than half-illuminated. This hemisphere is dominated by smooth plains, rather than heavily cratered terrain, and resembles portions of the Moon's maria in general shape. Half of a very large, multi-ringed basin named Caloris Basin appears near the center of the disc near the terminator. Its surrounding mountain ring is 800 miles (1.300 Km) in diameter".
(5 voti)
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Japetus from 5.878.000 Km.jpgJapetus from approx. 5.878.000 Km91 visitenessun commento
(5 voti)
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TITAN-N00006531.jpgTitan from Cassini-Huygens - app.x 340.000 Km away67 visitenessun commento
(5 voti)
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Titan-Dunes-PIA03567.jpgTitanian Dunes63 visiteOriginal caption:"Large areas of this Cassini synthetic aperture radar image of Titan are covered by long, dark ridges. They resemble the "cat scratches" seen in other places on Titan, but here they are longer and straighter. Spaced about 1 to 2 Km apart, they curve slightly around teardrop-shaped bright terrain, giving the impression of a Japanese garden of sand raked around boulders. The bright material appears to be high-standing rough material that the ridges bend around. This suggests that the ridges are dunes that winds have blown across the surface of Titan from left to right (roughly West to East).
This image was taken during the ninth Titan flyby on Oct. 28, 2005, (the fourth flyby for Cassini's synthetic aperture radar), at a distance of about 1300 Km (about 800 miles).
The image covers an area roughly 140 by 200 Km. It is located 13° South Lat. and 300° West Long.".
Nota: il vero mistero è 'dove' e 'come' la NASA abbia visto ed interpretato i rilievi in questione come possibili dune...
(22 voti)
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Volcanoes-Sapas_Mons-03.jpgMagellan Probe: radio image of Sapas Mons Volcano Area153 visiteInoltre - e per rendersi conto di questo dato basta verificare i documenti relativi all'operato della Sonda magellano - è fortemente probabile che la perdita del contatto radio sia stata causata dalla semplice e naturale consunzione della Navicella, costretta (per 4 anni) al lavoro in condizioni alquanto ostili.
(44 voti)
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Volcanoes-Sapas_Mons-01.jpgMagellan Probe: radio image of Sapas Mons Volcano123 visiteIl 12 Ottobre 1994, infatti, dopo 4 anni di orbite, di preziose osservazioni e di raccolta dati relativi al Pianeta, il contatto radio con la Terra si interrompeva bruscamente e, neppure 24 ore dopo, il Centro Controllo Missione dichiarava la (presunta) perdita definitiva della Navicella.
(34 voti)
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PHOEBE-PIA06067_modest.jpgPhoebe - closing up90 visitenessun commento
(17 voti)
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Saturn-N00020944.jpgThe "Head" of Saturn63 visitenessun commento
(29 voti)
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