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Volcanoes-Elysium_Mons.jpgElysium Mons (NASA/JPL/MSSS)74 visitenessun commentoGen 30, 2005
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Volcanoes-Olympus_Mons.jpgOlympus Mons (Natural Colors; NASA/JPL/MSSS)68 visitenessun commentoGen 30, 2005
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Mars-01.jpgMars' Solar Longitude 145° (1) - Tharsis Region92 visiteQueste tre immagini di Marte - riprese dalla Sonda MGS (Mars Global Surveyor) - oltre ad essere estremamente belle, ci rammentano la posizione attuale del Pianeta Rosso ed il succedersi delle sue stagioni per l'AD 2005, in accordo al Sistema "LS" o della "Longitudine Solare".
Ma che cos'è questo Sistema e come funziona?
La Longitudine Solare (o LS tout-court), oltre ad essere (ovviamente) un angolo, è anche uno strumento di misura dell'Anno Marziano.
Marte descrive un'orbita completa attorno al Sole - ossìa un giro di 360° - in "UN Anno Marziano" il quale prende avvìo alla Longitudine Solare di 0° e si completa alla Longitudine Solare di 360°.
Le stagioni Marziane, in accordo al "Sistema LS", si succedono nel modo seguente:
LS andante da 0° a 90° = Primavera a Nord ed Autunno a Sud
LS andante da 90° a 180° = Estate a Nord ed Inverno a Sud
LS andante da 180° a 270° = Autunno a Nord e Primavera a Sud
LS andante da 270° a 360° = Inverno a Nord ed Estate a Sud
Tutto chiaro?!?Gen 28, 2005
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Mars-03.jpgMars' Solar Longitude 145° (3) - Mare Cimmerium and Mare Elysium76 visitenessun commentoGen 28, 2005
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Mars-02.jpgMars' Solar Longitude 145° (2) - Acidalia Region and Mare Erythraeum73 visitevedi il commento al frame precedenteGen 28, 2005
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Craters-Unnamed_Crater_in_Chrise_Planitia-PIA07304.jpgUnnamed Crater in Chrise Planitia (Original NASA/MGS/MSSS b/w Frame)145 visiteCaption NASA originale:"This MGS-MOC image shows an impact crater in Chryse Planitia, not too far from the Viking 1 Lander site, that seems to resemble a bug-eyed head. The 2 odd depressions at the north end of the crater (the "eyes") may have formed by wind or water erosion. This Region has been modified by both processes, with water action occurring in the distant past via floods that poured across western Chryse Planitia from Maja Valles, and wind action common occurrence in more recent history. This crater is located near 22.5°N, 47.9°W". Che dire? Forse gli Alieni (diremmo che in questo caso potrebbe trattarsi dei "Grigi"...) non solo posseggono "tecnologia e senso artistico" ma anche un cospicuo "senso dell'umorismo": solo così, infatti, potremmo spiegare un simile "autoritratto"!
Scherzi a parte, in questo MGS frame è ripresa un'opera della Natura davvero incredibile e che, sicuramente, qualcuno interpreterà alla stregua della "Sfinge di Cydonia".
Naturale o Artificiale? That is the question...Gen 28, 2005
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Channels-Unnamed_Channel_near_Cydonia_Region-PIA07272-00.jpgArabia Terra, near Cydonia Region: the "Sphynx" River (Original NASA/MGS/MSSS b/w Frame)128 visiteE' davvero gratificante (e difficile) commentare immagini di simile impatto e bellezza: stiamo osservando il letto, ormai prosciugato (ma con degli abbondanti depositi di "qualcosa" che è rimasto adagiato e ben visibile sul fondo - forse fango?), di un antico fiume Marziano. Siamo nella pianura conosciuta come Arabia Terra, in prossimità della famosissima Cydonia Mensae.
Dato che questo fiume (a quanto ne sappiamo) passa attraverso la Regione di Cydonia, abbiamo deciso di chiamarlo, in omaggio ai "monumenti" che molti pensano si trovino in quella misteriosa zona di Marte, "Sphynx River": il Fiume della Sfinge.
Con buona pace, ovviamente, degli Amici della NASA...Gen 21, 2005
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North_Polar_Regions-The_Erg-PIA07282.jpgOutcrops in the North polar Erg (Original NASA/MGS/MSSS b/w Frame)109 visiteCaption NASA originale:"This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image, acquired during Northern Summer in December 2004, shows dark, windblown Sand Dunes in the North Polar Erg: a vast Sea of Sand Dunes that surrounds the North Polar Cap. These landforms are located near 80,3° North Lat. and 144,1° West Long. Light-toned features in the image are exposures of the substrate that underlies the immense Erg. The image covers an area of about 3 Km (1,9 mi) wide and is illuminated by sunlight from the lower left".
Nota Lunexit: le "light-toned features", a nostro avviso, sono soltanto degli affioramenti rocciosi (Rocky Outcrops). Gen 21, 2005
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Volcanoes-Pavonis_Mons.jpgPavonis Mons (Darkened Natural Colors; credits: NASA/MGS/MSSS)90 visiteCaption NASA originale:"This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) wide angle color composite image, obtained in December 2003, shows the middle of the three Tharsis Montes, Pavonis Mons. This is a broad shield volcano -similar to the volcanoes of Hawaii - located on the Martian equator at 113°W. The volcano summit is near 14 Km (~8.7 mi) above the martian datum (0 elevation); the central caldera (crater near center of image) is about 45 Km (~28 mi.) across and about 4.5 Km (~2.8 mi.) deep. Sunlight illuminates the scene from the lower left".Gen 07, 2005
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Volcanoes-Ceraunius_and_Uranius-E14-1248-1249_ceraunius50.jpgCeraunius and Uranius (Over-Saturated Natural Colors; credits: NASA/MGS/MSSS)102 visiteCaption NASA originale:"Acquired in March 2002, this Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) wide angle view shows the martian volcanoes, Ceraunius Tholus (lower) and Uranius Tholus (upper). The presence of impact craters on these volcanoes, particularly on Uranius Tholus; indicates that they are quite ancient and are not active today. The light-toned area on the southeastern face (toward lower right) of Ceraunius Tholus is a remnant of a once more extensive deposit of dust from the global dust storm events that occurred in 2001. The crater at the summit of Ceraunius Tholus is about 25 Km (15,5 mi) across. Sunlight illuminates the scene from the lower left".Gen 07, 2005
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Craters-Pollack_Crater-01.jpgThe "White Rock" inside Pollack Crater88 visiteCaption NASA originale:"The layering in White Rock suggests that the material is sediment deposited at some time in the distant past within Pollack Crater. The fact that the material erodes to form steep cliffs suggests that it is hard like rock. Thus, White Rock is interpreted to be an outcrop of sedimentary rock. It is probably a small remnant of a larger body of rock that may have once covered the entire floor of Pollack Crater; this view is supported by the observation that more extensive layered rocks are seen in other craters across the surface of the Red Planet (e.g., the crater at 8°N, 7°W)".Gen 07, 2005
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Craters-Pollack_Crater-00.jpgThe "White Rock" inside Pollack Crater (NASA/JPL/MSSS)92 visiteCaption NASA originale:"White Rock" is a ridged mound that was first seen and informally named "White Rock" in pictures from the Mariner 9 orbiter in 1972. In black-and-white photos, the feature appears much brighter than its surrounding terrain, giving the impression that the material is white. Later analyses of Mariner 9, Viking and MGS data showed that the feature isn't actually white: it is somewhat red and reflects only about 20-25% of the sunlight that falls upon it (a white surface would reflect 100%). Located in Pollack Crater, a 95 Km wide impact basin at 7.9°S, 334.7°W, White Rock is the light-red/orange feature with the rectangular white box drawn on it in the context view. The light-toned material that gives White Rock its name forms steep cliffs with valleys between them covered by dark, windblown, rippled sand". Gen 07, 2005
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