| Piú viste - A Tribute To Mars Global Surveyor |
Craters-Unnamed_Craters_with_Sedimentary_Rock_Outcrops-PIA07127-00.jpgSedimentary Rocks (Original NASA/MGS/MSSS b/w Frame)100 visiteCaption NASA originale:"Burial and Exhumation of Impact Craters, and their destruction by erosion, are common and repeated themes all over the Surface of Mars. Many Craters in Western Arabia Terra exhibit light-toned, Layered Outcrops of ancient Sedimentary Rock. Like the Sedimentary Rocks explored further to the South in Meridiani Planum by the Opportunity Mars Exploration Rover (MER-B), these "Intracrater Sedimentary Rocks" may have been deposited in water. This MGS-MOC image shows an example of light-toned Sedimentary Rocks outcropping in an Unnamed Crater that is much farther North than most of the similar examples in Western Arabia Terra. This one is located near 36,6 North Lat. and 1,4 West Long. and shows several old Impact Craters in various states of erosion and exhumation from beneath and within the Sedimentary Rock Materials. The image covers an area of approx. 3 Km".
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Chasmas-Melas_Chasma-07.jpgSample scarp edge in layered unit in Melas Chasma or... Frozen Waterfalls on Mars? (7)100 visitevedi i commenti svolti nei quadri precedenti
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Utopia_Planitia-Smoke-B-M0202863-PCF-LXTT.jpgControversial Surface Feature in Utopia Planitia (EDM n.1)100 visitevedi il commento al frame che precede
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Craters-Secondary_Crater_Field-PCF-LXTT.jpgSecondary Crater Field (Slightly Saturated Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)100 visitenessun commentoMareKromium
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Volcanoes-Pavonis_Mons.jpgPavonis Mons (Darkened Natural Colors; credits: NASA/MGS/MSSS)99 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".
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Chaotic_Terrain-Aram_Chaos-R2200155-03.jpgThe "Many Faces" of Aram Chaos (4 - EDM n. 3 - Enhanced and Darkened Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/Italian Planetary Foundation)99 visitenessun commentoMareKromium
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North_Polar_Features-Dunes-Dark_Dunes-MGS.jpgDark Dunes in Vastitas Borealis (Original NASA/JPL/MSSS b/w Frame)98 visiteCaption NASA originale:"This MGS-MOC image shows dark North Polar Dunes overlying other materials in the North Polar Region".
Location near: 79,1 North Lat. and 228,8 West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Summer
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Z-00-20130618_s2300831.pngEnd of Transmissions (the Final Image from MGS-MOC - CTX Frame)98 visiteThe Mars Orbiter Camera's blue wide-angle instrument on Mars Global Surveyor took image S23/00831 as part of MOC's routine observations of Mars for weather monitoring purposes. It was garbled upon reception on Earth because Mars Global Surveyor was close to solar conjunction at the time. Little did MOC's operators know that this would be their instrument's last image ever sent from Mars. NASA / JPL / MSSS
As garbled as it looks, there is a tiny bit of "sense" in the image, a small area of cratered terrain near the top. Ken Edgett says this is in southern Terra Sirenum near the Copernicus basin.MareKromium
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Craters-Pollack_Crater-01.jpgThe "White Rock" inside Pollack Crater97 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 8N, 7W)".
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Craters-Unnamed_Crater_in_Chrise_Planitia-01.jpgUnnamed Crater in Chrise Planitia (Original NASA/MGS/MSSS b/w Frame)97 visiteCaption originale:"This MGS-MOC image shows an impact crater in western Chryse Planitia that is approximately 850 mt (~2790 ft) in diameter, surrounded by a flat plain riddled by hundreds of smaller impact craters".
Location near: 27,6 N; 47,3 W
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Winter
Nota: la natura da impatto del cratere ripreso dalla Sonda MGS non pu essere, a nostro parere, n dedotta, n confutata dalle immagini di cui disponiamo. Ci che possiamo dire : qualunque sia l'origine di questo cratere senza nome, come spiegare i curiosi rilievi che sono chiaramente visibili sul suo bordo, ad ore 2, 3 e 6? Si tratta di "gullies"? Diremmo proprio di no. Cedimenti o frane? Difficile dirlo, ma siffatti rilievi, allorch visti dall'alto, si configurano - di regola - in maniera diversa.
E che dire, in particolare, delle due formazioni oblunghe visibili ad ore 6 (e simili a due craterini ovali...)? Esse sembrano essere il risultato di attivit geologicamente "recenti", a nostro avviso, ma la domanda "quali attivit"? Forse nuovi impatti? Certamente no. E allora? E allora noi rilanciamo l'invito, a Studiosi e Ricercatori, affinch si inizi una radicale riconsiderazione sulla genesi dei crateri: la teoria dell'impatto funziona SOLO sino ad un certo punto. Poi notte fonda...
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Chaotic_Terrain-Aram_Chaos-R2200155-10.jpgThe "Many Faces" of Aram Chaos (11 - EDM n. 10 - Original NASA/MGS/MSSS b/w Frame)97 visitenessun commento
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Collapse_Features-Trough-Cerberus_Fossae-01.jpgFeatures of Cerberus Fossae (Original NASA/MGS/MSSS EDM b/w Frame) 97 visiteCerchiatura Rossa: presenza di un gruppo di almeno cinque corpuscoli puntiformi (rocce cristalline?) i quali, pur essendo in ombra, appaiono decisamente molto luminosi.
Si nota inoltre, proprio al centro della Cerchiatura Rossa, la presenza di un rilievo scuro (un altro "seep" oppure un'ombra vera e propria?) i cui contorni, tuttavia, sembrano troppo netti per farci pensare ad un rilievo naturale (non pensiamo ad una manipolazione digitale bens, piuttosto, ad un rilievo troppo complesso da potersi vedere chiaramente ad una risoluzione che, pur se buona, ancora troppo bassa per consentire la visione accurata di profili particolarmente intricati come potrebbe essere quello in questione).
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