| Piú viste - The Best Frames from Viking Orbiter 1 and 2 |
vo1_250a13.jpgPhobos, according to Viking 167 visitenessun commento
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vo2_065b74.jpgMars, according to Viking 2 Orbiter66 visitenessun commento
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vo1_083a37.jpgMars: according to Viking 1 Orbiter64 visitenessun commento
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vo1_250a13-1.jpgA streak in the Sky (extra detail mgnf)63 visiteDettaglio ad elevato stretching della striscia di luce visibile in alto a Dx nel frame che segue. Si tratta di un artefatto fotografico davvero molto simile a quanto visibile anche nel frames (famosissimi) ottenuti, guarda caso sempre nelle vicinanze di Phobos, dalla Sonda Sovietica Phobos-2?
La coincidenza è forte, la somiglianza fra le due "strisce" è enorme; noi, però, vogliamo e dobbiamo essere pragmatici: non ci è possibile, infatti, fare alcuna speculazione sulla possibile causa e natura della Striscia di Luce in oggetto. UFO? Stella sullo sfondo che risulta mossa a causa della esposizione adottata dalla Sonda Viking 1 per ottenere questo frame?
O semplice photoartifact?
Ancora una volta (sorry...) dovete decidere Voi.
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vo1_058a02.jpgVery thin and bright "Water-Ice" Clouds62 visitenessun commento
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vo2_304b88.jpgPhobos over Tharsis60 visitenessun commento
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vo1_010a56.jpgMars: according to Viking 1 Orbiter59 visiteNASA's Viking Mission to Mars was composed of 2 spacecrafts: Viking 1 and Viking 2, each consisting of an Orbiter and a Lander.
The primary mission objectives were to obtain HR images of the Martian surface, characterize the structure and composition of the atmosphere and surface, and search for evidence of life. Viking 1 was launched on August 20, 1975 and arrived at Mars on June 19, 1976. The first month of orbit was devoted to imaging the surface to find appropriate landing sites for the Viking Landers. On July 20, 1976 the Viking 1 Lander separated from the Orbiter and touched down at Chryse Planitia (22,48° N, 49,97° W planetographic, 1,5 Km below the datum - 0 elevation). Viking 2 was launched September 9, 1975 and entered Mars orbit on August 7, 1976. The Viking 2 Lander touched down at Utopia Planitia (47,97° N, 225,74° W, 3 Km below the datum) on September 3, 1976. The Orbiters imaged the entire surface of Mars at a resolution of 150 to 300 meters.
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vo1_318a24.jpgPhobos: according to Viking 1 Orbiter59 visitenessun commento
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MarsColors03-Viking.jpgThe Colors of Mars (3)59 visiteColor is of considerable geologic interest because it allows remote detection of chemical and mineralogical differences. Only the upper few millimeters of the surface contribute to the color and on Mars this layer may be mostly wind blown debris. The bright materials that dominate the north equatorial zone are apparently aeolian deposits. Two units have been recognized. The upper unit is discontinuous, very red, and among the brightest of materials exposed at the planet's surface. The lower unit is darker and less red. The boundary between the two is generally serrated and has no relief. In the southern e equatorial belt, the color variations are apparently related to local bedrock and not to randomly dispersed aeolian debris. The dark highland region (0° to 40° S and 60° W to 30° E) is divided into (a) dark red ancient crater rims, rugged plateaus, mostly riddled with small channels , and graben; and (b) dark "blue" volcanic flows intermediate in age, and show very few channel networks. The large volcanic constructs in the Tharsis region and volcanic centers in the southern highlands northeast of Hellas are both very dark and very red.
In this image, all three color components have received the same contrast e enhancement, which approaches saturation in the brightest areas. Because Mars is by a factor of two to three more reflective in the red than in the violet, the red component is predominant-giving the planet its classic rusty appearance. Some artifacts of the processing remain in the image, for example, diagonal streaks running from upper left to lower right.
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Phobos-03.jpgStereo views of Phobos59 visiteCaption NASA originale:"The upper pair shows the side facing away from Mars at a range of 500 Km from the Viking 1 Orbiter. The large craters near the limb are about 4 Km across and a few hundred meters deep. The lower pair shows the side facing Mars at a range of 300 Km.
The grooves are radiating from Stickney and are tens of kilometers long, hundreds of meters wide and can be tens of meters deep".
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vo1_022a54.jpgMars: according to Viking 1 Orbiter58 visiteFurther information on the spacecraft, experiments, and data returned from the Viking missions can be found in the September 30, 1977 issue of the Journal of Geophysical Research, "Scientific Results of the Viking Project", vol. 82, no. 28.
ATTENZIONE: se avete letto con attenzione la caption NASA originale, si dice, senza enfasi e quasi "con nonchalance", che gli affioramenti di H2O sono evidenti e conclamati "...evidence of surface water are apparent in the Orbiter images...". Certo, si potrebbe obbiettare che la caption sta facendo riferimento ad "antichi" affioramenti ma...Noi leggiamo il testo e non lo interpretiamo: il testo dice che "...evidenze di acque superficiali sono palesi nelle immagini degli Orbiter...".
Parola della NASA, e se lo dicono loro...
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vo1_035a64.jpgMars: according to Viking 1 Orbiter58 visitenessun commento
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