| Piú viste - A Tribute To Mars Global Surveyor |
Craters-Unnamed_Crater_in_Amazonis_Planitia-M1101105.jpgUnnamed Crater in Amazonis Planitia (Original NASA/MGS/MSSS b/w Frame)55 visitenessun commento
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Craters-Holden_Crater-3-M0302733.jpgHolden Crater floor near intersection with Uzboi Vallis55 visitenessun commento
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Volcanic_Features-Fissure-Tharsis_Region-M0806311Det.jpgMartian "Freeway" in Tharsis Region (Original NASA/MGS/MSSS b/w Frame)55 visiteUn'autostrada Marziana (come ci piacerebbe pensare...) o un gigantesco e lunghissimo crack che attraversa la suggestiva regione dove sorgono i vulcani Ascraeus e Pavonis Montes?
Uno splendido fotogramma MGS-MOC che ci mostra l'antico letto di un fiume Marziano o, più probabilmente, il risultato di un grande evento sismico occorso in ere remote. Non possediamo informazioni al riguardo ma potrebbe anche darsi che questo grande canale sia stato disegnato, in prima battuta, da un sisma e poi sia stato "perfezionato", nella sua struttura di dettaglio, da qualche altro evento vulcanico (la Regione è quella giusta...). Le solite dune che appaiono in qualche sua sezione ci fanno anche considerare l'ipotesi che questa gola, un tempo e solo in qualche suo punto preciso, sia anche stata invasa dalle acque.
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South_Polar_Features-South_Polar_Cap-PIA04287.jpgThe South Pole of Mars (Original NASA/MGS/MSSS b/ Frame)55 visiteOn 8 September 2005 (UT), the MGS-MOC resumed imaging of Mars after a nearly 2-week hiatus to recover the spacecraft from a glitch that put MGS into a protective "safe mode". The MOC was turned on during MGS orbit 29053, while the spacecraft was flying across day side of the Planet. MOC then resumed taking pictures on the next orbit. Shown here is a portion of the first picture acquired following MOC turn-on. The image shows a view of the Martian South Polar Region, as it appeared on September 8, 2005. The image was taken by MOC's red wide angle camera. In this case, the spacecraft began imaging Mars as it passed across the southern terminator, at the bottom of the image. MGS then flew southward, over the Polar Cap, then northward toward the Equator. The Equatorial Region is further north than the area shown here. The equatorial region is further north than the area shown here. The image not only provided the MOC team a confirmation that MOC imaging has resumed, this particular image, in the map-projected form shown here, is being used by the team to assist in setting the exposures for MOC narrow angle camera images that will be acquired from the south polar region over the next several days.
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Craters-Eberswalde_Crater-2-PIA04293_fig2.jpgEberswalde Crater and Delta in HR55 visiteOriginal caption:"Additional images from MOC provide some context and show a nearby portion of the fossil delta's inverted channels at a spatial scale of 1,5 mt (about 5 feet) per pixel. The relative positions of these 3 images are indicated in a mosaic image of the entire delta - picture (1). The first MOC narrow angle images of some of the landforms in the delta were acquired in 2000, during the MGS primary mission, but those pictures did not show very well the unambiguous inverted channel forms. Not until the second Earth year of the orbiter's extended mission were the deltaic features recognized in MOC images obtained in March and June of 2002.
Following the initial observations in 2002, the MOC Team began a systematic effort to map the entire Eberswalde Crater delta. Most of this imaging required slewing the whole spacecraft in a technique called "roll only targeted observation" so that it pointed the camera toward the feature. In this way, the camera team was able to build up a mosaic of the delta much more quickly than would have been the case if the team had simply relied upon chance crossing of the delta by the orbiter's usual ground track. This technique was not employed during Mars Global Surveyor's primary mission, except in the search for Mars Polar Lander, but became a routine part of the tool kit during the extended mission".
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Craters-Terby_Crater-02.jpgThe Sedimentary Layers of Terby Crater (2 - Original NASA/MGS/MSSS b/w Frame)55 visitenessun commento
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South_Polar_Features-Spiders-00.jpgSpiderland (Original NASA/MGS/MSSS b/w Frame)55 visiteCaption originale:"This MGS-MOC image shows an area adjacent to the South Polar Residual Cap that hosts several intricate fracture networks. Each network consists of multiple fractures radiating from a central location. Their origin is not understood - some investigators have speculated that these are sites of release of carbon dioxide from beneath the ground, but this explanation seems inadequate to explain all attributes of the features.
MOC images have shown that these features have not been changing from year to year during the course of the MGS mission".
Location near: 87,1° South Lat. and 234,1° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Summer
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South_Polar_Features-Spiders-01.JPGSpiderland (Original NASA/MGS/MSSS b/w Frame)55 visiteCaption originale:"This MGS-MOC image shows Cracked Surfaces in the South Polar Layered Terrain of Mars. The Cracks in this scene have formed complex dendritic arrays. Evidence of the Fracture Networks is clear in the topmost Layer; however, close inspection reveals traces of apparently older Networks in the underlying Layers".
Location near: 79,1° South Lat. and 194,2° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Summer
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Chaotic_Terrain-Aram_Chaos-R2200155-02.jpgThe "Many Faces" of Aram Chaos (3 - EDM n. 2 - Original NASA/MGS/MSSS b/w Frame)55 visiteUna speculazione ulteriore del Dr Skipper è che una possibile forma di Civiltà Indigena Marziana stia cercando di "salvare il salvabile", ossìa - impiegando sistemi e tecnologie che non riusciamo a comprendere (nè a vedere) - stia tentando in tutti i modi di mantenere almeno un minimo di acque correnti sulla superficie di Marte.
"If so and there are actually extensive civilization populations on Mars, it may seem strange at first blush that so many of them appear to be so focused on water on such a generally arid planet to the point of even getting in the water that is left with their developments. On the other hand, if these populations have historically been part of this drying planetary reality for a very long time and have a historical memory base of more water plentiful times, it may be understandable that they may a bit compulsively try to preserve as much as possible a current semblance of the older loved conditions. Of course there may be other reasons as well"
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Terra_Cimmeria-Gullies-PIA02919-1.jpgGullies in Terra Cimmeria (Original RAW Frame)55 visiteCaption originale NASA:"This MGS-MOC image shows two suites of gullies within a single impact crater in the Terra Cimmeria Region. The gullies near the top of the image are located on the northern wall of the crater, while the lower suite resides on a lower bench in the crater's northern wall complex. Gully erosion has cut into the layered rock exposed on the crater wall. Water may have been involved in their formation".
Location near: 38,2° South; 190,6° West
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Summer
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Troughs-Olympica_Fossae-MGS-02.jpgThe Troughs of Olympica Fossae (2 - Original NASA/MGS/MSSS b/w Frame)55 visiteCaption originale:"This MGS-MOC image shows a complex pattern of intersecting and overlapping Troughs in the Olympica Fossae Region of Northern Tharsis. Some combination of Floods, Lava Flows and faulting/tectonic activity contributed to this scene, followed by mantling by dust. Dark Streaks on Slopes in the Troughs were formed by Dust Avalanches".
Location near: 24,8° North Lat. and 114,8° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Winter
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South_Polar_Features-Swiss_Cheese_Terrain-00.JPGEarly Fall at the South Pole55 visiteCaption NASA originale:"This MGS-MOC image shows a portion of the South Polar Residual Cap. The darkened edges of the pits and mesas are evidence of the removal — by sublimation — of frozen CO2 during the recent Martian Summer.
Summer ended and Autumn began in January 2006, shortly before this image was acquired".
Location near: 86,8° South; 90,5° West
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Summer
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