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VF-Cressida, Ophoelia, Portia.jpgCressida, Ophoelia and Portia - Voyager 272 visiteUn piccolissimo commento (forse abbastanza scontato): noi non sappiamo chi, fisicamente, abbia dato i nomi a queste Lune Minori di Urano ma, certamente, si trattava di un appassionato lettore di Sir William Shakespeare.
Non credete?!?...
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VG-Desdemona-V2.jpgDesdemona - Voyager 266 visitenessun commento
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VH-Juliet-V2.jpgJuliet - Voyager 266 visitenessun commento
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VI-Puck-HR-V2.JPGPuck (possible Natural Colors; credits: Lunar Explorer Italia)75 visitenessun commentoMareKromium
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VI-Puck-V2.jpgPuck - Voyager 274 visitenessun commento
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VI-Puck-vg2_2683716.jpgPuck (HR)66 visitenessun commento
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VL-Rosalind-V2.jpgRosalind - Voyager 255 visitenessun commento
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VM-Sycorax.jpgSycorax53 visitenessun commento
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VO-Uranus-PIA00032.jpgUranus in natural and false colors56 visiteCaption NASA originale:"These two pictures of Uranus - one in true color (left) and the other in false color - were compiled from images returned Jan. 17, 1986, by the narrow-angle camera of Voyager 2. The spacecraft was 9,1 MKM (5,7 MMs) from the planet, several days from closest approach. The picture at left has been processed to show Uranus as human eyes would see it from the vantage point of the spacecraft. The picture is a composite of images taken through blue, green and orange filters. The darker shadings at the upper right of the disk correspond to the day-night boundary on the planet. Beyond this boundary lies the hidden northern hemisphere of Uranus, which currently remains in total darkness as the planet rotates.
The blue-green color results from the absorption of red light by methane gas in Uranus' deep, cold and remarkably clear atmosphere. The picture at right uses false color and extreme contrast enhancement to bring out subtle details in the polar region of Uranus. Images obtained through ultraviolet, violet and orange filters were respectively converted to the same blue, green and red colors used to produce the picture at left. The very slight contrasts visible in true color are greatly exaggerated here. In this false-color picture, Uranus reveals a dark polar hood surrounded by a series of progressively lighter concentric bands. One possible explanation is that a brownish haze or smog, concentrated over the pole, is arranged into bands by zonal motions of the upper atmosphere. The bright orange and yellow strip at the lower edge of the planet's limb is an artifact of the image enhancement. In fact, the limb is dark and uniform in color around the planet".
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VP-URANUS-PIA01360.jpgUranus in natural colors55 visiteCaption NASA originale"These 2 pictures of Uranus were compiled from images recorded by Voyager 2 on Jan. 1O, 1986, when the NASA spacecraft was 18 MKM (11 MMs) from the Planet. The images were obtained by Voyager 2 narrow-angle camera; the view is toward the planet's pole of rotation, which lies just left of center. The picture on the left has been processed to show Uranus as human eyes would see it from the vantage point of the spacecraft. The second picture is an exaggerated false-color view that reveals details not visible in the true-color view - including indications of what could be a polar haze of smog-like particles. The true-color picture was made by combining pictures taken through blue, green and orange filters. The dark shading of the upper right edge of the disk is the terminator, or day-night boundary. The blue-green appearance of Uranus results from methane in the atmosphere; this gas absorbs red wavelengths from the incoming sunlight, leaving the predominant bluish color seen here".
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ZA-Uranus-IP-V2-PIA00346_modest.jpgFarewell Uranus... (1)57 visiteCaption NASA originale:"This image shows a crescent Uranus, a view that Earthlings never witnessed until Voyager 2 flew near and then beyond Uranus on January 24, 1986. The hazy blue-green atmosphere probably extends to a depth of around 5.400 miles, where it rests above what is believed to be an icy or liquid mixture (an 'ocean') of water, ammonia, methane and other volatiles, which in turn surrounds a rocky core, perhaps a little smaller than Earth".
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ZA-Uranus-LP-PIA00143.jpgFarewell Uranus... (2)85 visiteCaption NASA originale:"This view of Uranus was recorded by Voyager 2 on Jan 25, 1986, as the spacecraft left the planet behind and set forth on the cruise to Neptune. Voyager was 1 MKM (about 600.000 miles) from Uranus when it acquired this wide-angle view. The picture - a color composite of blue, green and orange frames - has a resolution of 140 Km (90 mi) per pixel".
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