Triton3.jpgThin clouds on Triton126 visiteDeboli e sottilissime nuvole (strati) caratterizzano, saltuariamente, il cielo di Tritone. Un Mondo lontano e gelido che riceve, mediamente, poco più di 1/400mo della luce che la Terra riceve dal Sole, eppure...Eppure Tritone possiede un'atmosfera ed essa mostra (come risulta evidente da questa immagine) di essere "viva" e capace di esprimere "fenomeni" quali nuvole e venti. Probabilmente passerà un secolo (o anche di più) prima che qualche Governo finanzi una Missione ricognitiva del Sistema di Nettuno e - magari - simile, in termini di contenuti, alla Missione "Cassini-Saturno". Certamente, quando avremo avuto risposte significative alle domande che ci stiamo ponendo in questo momento, coloro che scrivono sulle pagine di Lunar Explorer non ci saranno più.
Ma è questo, forse, il fascino della Scienza: Essa non si ferma mai e, se c'è la Volontà, qualcuno riprende sempre il lavoro interrotto da altri e, prima o poi, lo conduce al termine...
Original caption:"This image of Triton shows a thin cloud layer along the limb of the moon. The image was obtained as Voyager 2 swept past Triton at a speed of 27 kilometers per second and passed within 39,800 kilometers. Voyager discovered that Triton possessed a thin atmosphere of 15 microbars or 0.000015 times the surface pressure on Earth at sea level. The limb of Triton also showed a thin haze about 13 kilometers from the surface of the planet and thin patches of clouds as shown by this image".06/04/12 at 07:45Anakin: prendendo spunto dall'apod di oggi. Ha un atti...
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Triton-PIA12184.jpgVolcanic Plains on Triton (possible Natural Colors; credits: Lunexit)56 visiteCaption NASA:"This view of the Volcanic Plains of Neptune's moon Triton was produced using topographic maps derived from images acquired by NASA's Voyager Spacecraft during its August 1989 flyby, 20 years ago this week (August 2009).
Triton, Neptune's largest moon, was the last solid object visited by the Voyager 2 Spacecraft on its epic 10-year tour of the Outer Solar System.
This regional view shows a variety of Terrains on Triton, including the smooth Volcanic Plains in the foreground, formed by icy lavas. Parts of this Surface have been eroded, forming mounds and depressions with relief of tens to a few hundred meters (several hundred feet). The round pits and mounds across the center of the scene are probably volcanic explosion or collapse craters, the largest of which (at bottom center) is approx. 250 meters deep (820 feet) and approx. 15 Km (about 9 miles) across.
Many of these pits are aligned in chains similar to those seen in basaltic volcanic areas on Earth, such as Craters of the Moon National Monument in Idaho, except the lavas on Triton are water and other ices that erupted onto the Surface.
In the distance is one of two large walled smooth plains of unknown origin. These plains are roughly 200 Km (about 124 miles) across.
The Surface of Triton is very rugged, scarred by rising blobs of ice (Diapirs), Faults and Volcanic Pits and Lava Flows composed of water and other ices. The Surface is also extremely young and sparsely cratered. It may even be younger than the Surface of Europa, one of the first objects visited by the Voyager Spacecraft and could be geologically active today.
Although locally very rugged, Triton has no large mountains or deep basins and regional relief is low, a consequence of its high internal heat and the low strength of most ices. This scene is on the order of 500 Km (about 310 miles) across and is taken from a new flyover movie across the Equatorial Regions of Triton commemorating the Voyager 20-year anniversary of this flyby.
Vertical relief has been exaggerated by a factor of 25 to aid interpretation".MareKromium09/10/09 at 16:42MareKromium: Ed infatti ? pochissima! Ma non dimenticare che qu...
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Triton-PIA12184.jpgVolcanic Plains on Triton (possible Natural Colors; credits: Lunexit)56 visiteCaption NASA:"This view of the Volcanic Plains of Neptune's moon Triton was produced using topographic maps derived from images acquired by NASA's Voyager Spacecraft during its August 1989 flyby, 20 years ago this week (August 2009).
Triton, Neptune's largest moon, was the last solid object visited by the Voyager 2 Spacecraft on its epic 10-year tour of the Outer Solar System.
This regional view shows a variety of Terrains on Triton, including the smooth Volcanic Plains in the foreground, formed by icy lavas. Parts of this Surface have been eroded, forming mounds and depressions with relief of tens to a few hundred meters (several hundred feet). The round pits and mounds across the center of the scene are probably volcanic explosion or collapse craters, the largest of which (at bottom center) is approx. 250 meters deep (820 feet) and approx. 15 Km (about 9 miles) across.
Many of these pits are aligned in chains similar to those seen in basaltic volcanic areas on Earth, such as Craters of the Moon National Monument in Idaho, except the lavas on Triton are water and other ices that erupted onto the Surface.
In the distance is one of two large walled smooth plains of unknown origin. These plains are roughly 200 Km (about 124 miles) across.
The Surface of Triton is very rugged, scarred by rising blobs of ice (Diapirs), Faults and Volcanic Pits and Lava Flows composed of water and other ices. The Surface is also extremely young and sparsely cratered. It may even be younger than the Surface of Europa, one of the first objects visited by the Voyager Spacecraft and could be geologically active today.
Although locally very rugged, Triton has no large mountains or deep basins and regional relief is low, a consequence of its high internal heat and the low strength of most ices. This scene is on the order of 500 Km (about 310 miles) across and is taken from a new flyover movie across the Equatorial Regions of Triton commemorating the Voyager 20-year anniversary of this flyby.
Vertical relief has been exaggerated by a factor of 25 to aid interpretation".MareKromium09/10/09 at 16:07Anakin: Da ignorante pensavo che su questi lontani "m...
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