A Tribute To Mars Global Surveyor
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HomePlate-s1200095_home_plate_resolution_065mt.jpgHome Plate, from orbit54 visitenessun commentoMareKromium
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Inca-City-AB107908.jpgA true "South Polar Oddity": Inca City (1)53 visiteDati contestuali di riferimento:
Longitude of image center: 64,63° West
Latitude of image center: 81,48° South
Scaled pixel width: 15,47 mt
Scaled image width: 31,88 Km
Scaled image height: 32,87 Km
Solar longitude (Ls): 246,89°
Local True Solar Time (M.L.T.): 12,90 (decimal hours) such as --> 12:54
Emission angle: 58,14°
Incidence angle: 58,59°
Phase angle: 25,53°
North azimuth: 250,10°
Sun azimuth: 238,48°
Spacecraft altitude: 3222,87 Km
Slant distance: 4167,30 Km
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Inca-City-M0306902-00.jpgA true "South Polar Oddity": Inca City (2 - False Colors)57 visite"Inca City" is the informal name given by Mariner 9 Scientists in 1972 to a set of intersecting, rectilinear ridges that are located among the layered materials of the South Polar Region of Mars. Their origin has never been understood; most investigators thought they might be sand dunes, either modern dunes or, more likely, dunes that were buried, hardened, then exhumed. Others considered them to be dikes formed by injection of molten rock (magma) or soft sediment into subsurface cracks that subsequently hardened and then were exposed at the surface by wind erosion.
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Inca-City-M0306902-01.jpgA true "South Polar Oddity": Inca City (3 - False Colors)53 visiteThe Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) has provided new information about the "Inca City" ridges, though the camera's images still do not solve the mystery. The new information comes in the form of a MOC red wide angle context frame taken in Mid-Southern Spring (Image 1). The MOC image shows that the "Inca City" ridges, located at 82° South and about 67° West (293° East), are part of a larger circular structure that is about 86 Km (about 53 mi) across. It is possible that this pattern reflects an origin related to an ancient, eroded meteor impact crater that was filled-in, buried, then partially exhumed. In this case, the ridges might be the remains of filled-in fractures in the bedrock into which the crater formed, or filled-in cracks within the material that filled the crater. Or both explanations could be wrong. While the new MOC image shows that "Inca City" has a larger context as part of a circular form, it does not reveal the exact origin of these Striking and Unusual Martian Landforms.
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Inca-City-M1501795.jpgA true "South Polar Oddity": Inca City (4 - False Colors)53 visitenessun commento
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Isidis_Planitia.jpgMartian "Cat-paw" print - Isidis Planitia (Original NASA-MGS-MSSS b/w Frame) 61 visiteOriginal caption:"This MGS-MOC image shows a mesa in North-Eastern Isidis Planitia. The mesa might be a remnant of terrain that once more extensively covered the Region".
Location near: 20,3° North and 267,7° West
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Winter
Nota: il titolo che abbiamo dato al frame è giustificato dalla formazione craterica visibile sulla mesa la quale ci ricorda, in maniera quasi perfetta, l'impronta di un felino sulla sabbia.
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Landslides-Tithonium_Chasma-MGS-00.jpgLandslide in Tithonium Chasma (1 - Original NASA/MGS/MSSS b/w Frame)53 visiteCaption NASA originale:"This MGS-MOC image shows a landslide that occurred off of a steep slope in Tithonium Chasma, part of the vast Valles Marineris Trough System".
Location near: 4,8° South Lat. and 84,6° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Autumn
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Landslides-Tithonium_Chasma-MGS-01.jpgLandslide in Tithonium Chasma (2 - Original NASA/MGS/MSSS b/w Frame)53 visitenessun commento
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Landslides-Tithonium_Chasma-MGS-02.jpgHuge Landslide near Tithonium Chasma (Original NASA/MGS/MSSS b/w Frame)55 visiteCaption originale:"This MGS-MOC image shows a small portion of a large landslide deposit located on the floor of western Tithonium Chasma".
Location near: 4,3° South Lat. and 87,9° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Southern Summer
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Layers-Sinus_Meridiani-MGS-PCF-LXTT.jpgWe see the Island; we don't see the Sea... (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunar Explorer Italia)53 visiteCaption originale:"This MGS-MOC image shows layered, sedimentary rock exposures in the Sinus Meridiani Region".
Location near: 4,8° N; 1,2° W
Image width: ~1 Km (~0,6 mi)
Illumination from: lower left
Season: Northern Autumn
Nota: titolo dell'immagine assolutamente autoesplicativo. Non ci sembra difficile vedere, infatti (ed a parte l'asciutto commentino NASA), quello che rimane di un'isola e delle stratificazioni che hanno segnato il lento ritrarsi delle acque dai suoi dintorni. Dunque la domanda è: dov'è andata a finire il lago (o il fiume o l'oceano) che la circondava?MareKromium
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Lycus_Sulci_Region-PIA07889.jpgSmall Mountain in Lycus Sulci (Original NASA/MGS/MSSS b/w Frame)57 visiteCaption NASA originale:"This MGS-MOC image shows a small Mountain in the Lycus Sulci Region, located North/West of the Olympus Mons Volcano. Dark Streaks, probably caused by avalanching and flow of extremely dry Dust, have formed on the Mountain's Slopes. The various ridged and grooved textures in this scene were formed by Wind Erosion".
Location near: 22,6° North Lat. and 145,5° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Summer
Nota: la forma (solo vagamente) squadrata della base di questa piccola montagna di Lycus Sulci non tragga in inganno i cercatori di resti di antiche costruzioni (piramidi & sim.) sulla superficie del Pianeta Rosso: nonostante il Prof. Hoagland ed altri Ricercatori nati e cresciuti sulla sua scia la pensino diversamente, tantissimi rilievi Marziani (ripresi da altezze variabili fra i 280 ed i 330 Km di quota) mostrano i 'segni di (apparenti) squadrature'.
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Mars-01.jpgMars' Solar Longitude 145° (1) - Tharsis Region79 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?!?
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