| Piú viste - A Tribute To Mars Global Surveyor |
Chaotic_Terrain-Aram_Chaos-R2200155-10.jpgThe "Many Faces" of Aram Chaos (11 - EDM n. 10 - Original NASA/MGS/MSSS b/w Frame)82 visitenessun commento
|
|
Craters-Unnamed_Crater_in_Noachis_Terra-PIA07202_modest.jpgUnnamed Crater in Noachis Terra (Original NASA/MGS/MSSS b/w Frame)80 visiteCaption NASA originale: "This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows an impact crater, a little over 2 Km (> 1,2 mi) in diameter, located in Noachis Terra near 50.4°S, 14.3°W. The crater's bouldery ejecta blanket has protected underlying material from being eroded away by wind, leaving the ejecta up on a low pedestal. This picture covers an area about 3 km (1.9 mi) across, and is illuminated by sunlight from the upper left".
|
|
Craters-Lomonosov_Crater.jpgLomonosov Crater in Wintertime80 visiteCaption NASA originale:"On April 20, 2000 (Wintertime on Mars), the Mars Orbiter Camera (MOC) onboard Mars Global Surveyor (MGS) captured this view of a chilly Lomonosov Crater. The rims of the crater appear white because they are covered with wintertime frost. A dark patch just right of center on the crater floor is a sand dune field. Both low-lying ground fogs (fuzzy, patchy areas around the lower perimeter of the crater) and higher cloud layers (fuzzy white arcs seen within the crater and towards the upper right) obscure much of the surface. The Sun, only 12° above the horizon, bathes the scene in a reddish-brown hue. Lomonosov Crater is about 150 Km (93 mi) across and located on the martian northern plains at 64.8° N, 8.8° W. The crater is named for the 18th Century Russian chemist, Mikhail V. Lomonosov (1711-1765)".
|
|
Aeolian_Features-Dust_Storms-Mars___Earth_Comparison.jpgDust Storms on Mars and Earth80 visiteUn'interessante confronto fra una tempesta di sabbia Marziana (come vista dalla Sonda Mars Global Surveyor) ed una tempesta di sabbia che, sollevatasi con ogni probabilità dalla porzione più occidentale del deserto del Sahara, si sta ora spostando al largo dell'Oceano Atlantico.
Indubbiamente un'immagine suggestiva che evidenzia le diversità più che le similitudini esistenti fra la Terra e Marte. Inoltre, sempre secondo noi, la coloritura che è stata data alla "nube sabbiosa" terrestre è - anche in questo caso - davvero discutibile.
Chissà, forse alla NASA l'attribuzione dei colori alle immagini costituisce un problema davvero insuperabile...
|
|
Volcanic_Features-Collapse_Pits-Pavonis_Mons_Area.jpgPit Chain on the Eastern Flank of Pavonis Mons (Original NASA/MGS/MSSS b/w Frame)80 visiteCaption NASA originale:"Pavonis Mons is the middle of the 3 large Tharsis Montes Volcanoes in the Martian Western Hemisphere.
Located on the Equator at about 113° West Longitude, Pavonis Mons stands as much as 7 Km above the surrounding Plain. The MGS-MOC recently spied the above Chain of Elliptical Pits on the lower East Flank of Pavonis Mons. The picture covers an area approx. 3 Km wide by 3,4 Km in length. The Pits are aligned down the center of a 485 meters-(approx. 530 yards)-wide, shallow Trough.
The straight Trough and the Pits were both formed by collapse associated with faulting. The Scarp on each side of the Trough is a "Fault Line" - Troughs of this type are known to geologists as "Graben". Such features are typically formed when the ground is being moved apart by tectonic forces, or when the ground is uplifted by molten rock injected into the near sub-surface from deeper underground. Both processes may be contributing to the features seen on Pavonis Mons. The Pits follow the trend of these Faults, and indicate the locus of collapse".
|
|
Craters-Kunowsky_Crater-2004_06.jpgFrost and Wavy Clouds on Kunowsky Crater (Original NASA/MGS/MSSS b/w Frame)80 visiteCaption NASA originale:"This red wide angle MGS-MOC image, acquired in March 2004, shows Kunowsky Crater ringed by seasonal Frost. Kunowsky Crater is about 67 Km (~42 mi) in diameter. Wavy Clouds form to the East of the Crater in early Spring as winds circulate from West to East. The Crater is located at about 57,1° North Lat. and 9,7° West Long.".
|
|
Craters-Korolev_Crater-PIA06896-PCF-LXTT.jpgWave Clouds off Korolev Crater (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)80 visiteCaption NASA:"This red wide angle Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows a wavy Cloud Pattern formed in the lee of Korolev Crater, which is located near 72,8° North and 195,7° West (Vastitas Borealis Region). Korolev Crater is about 85 km (approx. 53 mi) in diameter and named for Sergei P. Korolev, a pioneering Russian rocket designer and engineer who died in the mid-1960s. The image, acquired in late Northern Summer, is illuminated by sunlight from the lower left".MareKromium
|
|
South_Polar_Features-The_A_C__Trees-A-M0804688-00.jpgThe "Martian Trees" (Original NASA/MGS/MSSS b/w Frame)79 visiteTanti commenti sono stati già fatti e non li ripetiamo. La curiosità che Vi segnaliamo, invece, è data dal nome attribuito a questi rilievi anomali dal Curatore del Sito MU: gli "Arthur Clarke Trees".
Un nome carino ed ingegnoso, anche se leggermente ambiguo (al pari, comunque, del grande Scrittore ed Autore, fra l'altro, della saga di "2001: A Space Odyssey" - 4 volumi - oltre che del meraviglioso, sebbene poco conosciuto, "Beyond the Fall of the Night").
|
|
Craters-South_Polar_Crater-M0702775Det.jpgUnnamed South Polar Crater (Original NASA/MGS/MSSS b/w Frame)79 visitenessun commento
|
|
Collapse_Features-Trough-Cerberus_Fossae-00.jpgFeatures of Cerberus Fossae (Original NASA/MGS/MSSS CTX b/w Frame)79 visiteCaption originale:"This MGS-MOC image shows a landscape in the Eastern Cerberus Region that was scoured by catastrophic Floods, and later cut by a deep, dark-walled Trough. The Trough is radial to the Elysium Volcanic Region, and formed along Faults in the Bedrock".
Location near: 15,7° North Lat. and 196,6° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Winter
Nota: l'immagine è davvero spettacolare ed è anche prodiga di dettagli (grazie ad un'eccellente definizione); purtroppo, però, non riusciamo a vedere bene se, nelle parti più in ombra - e forse anche più profonde - del crepaccio che lacera la porzione orientale della Regione di Cerberus, si nasconde qualcosa di particolare, oltre alle "dunette sinuose" (una forma affine ai Side-Winders di Meridiani Planum).
Cerchiature Verdi: è agevole notare la presenza di ampie chiazze scure su buona parte del SOLO versante occidentale (Sx) del crepaccio le quali, secondo noi, NON sono assolutamente delle ombre. E' del tutto ovvio che la reale natura delle "macchie" sia indefinibile da questa altezza (380 Km) e con questa definizione, ma l'ipotesi che si tratti di "affioramenti di umidità", ovvero di "seeps" molto estesi ed in corso di sviulppo, o magari di aree ricoperte da una sorta di vegetazione indigena (magari muschi e licheni?), come già pensano in molti, non ci sembrano tanto irrealistiche.
|
|
Craters-Unnamed_Crater_with_Windstreak_in_Sirtis_Major_Planum-PCF-LXTT.jpgCrater and Windstreak in Syrtis Major Planum (Enhanced Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga)79 visitenessun commentoMareKromium
|
|
South_Polar_Features-Defrosting_Dunes-2005_06-00.jpgDefrosting Dunes (Original NASA/MGS/MSSS b/w Frame)78 visiteCaption NASA originale:"This MGS-MOC image shows dark spots formed in carbon dioxide frost that covers the surfaces of patches of sand in the South Polar Region. As spring arrived this year in the Martian Southern Hemisphere, so began the annual defrosting process.
The fact that sand dunes begin to defrost earlier than other surfaces and that the defrosting process involves the formation of spots like these, has been known since the earliest days of the MGS mission".
Location near: 66,8°S; 15,7°W
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Spring
|
|
| 512 immagini su 43 pagina(e) |
 |
|
|
|
|
20 | |
|
|
|
|
