| Piú votate - A Tribute To Mars Global Surveyor |
Hills-Utopia_Planitia-PCF-LXTT.jpgBouldery Hill in Utopia Planitia (Natural Colors; credits for the additional process. and color: Dr Paolo C. Fienga - Lunexit Team)164 visiteCaption NASA originale:"Boulders are one of the possible keys to determining which processes have eroded, transported and deposited material on Mars (i.e.: Landslides, Mudflows, Flood Debris etc.).
During the first year in orbit, MGS-MOC obtained pictures with resolutions between 2 and 30 mt per pixel. It was found that Boulders are difficult to identify on Mars in images with resolutions worse than about 2-3 meters per pixel. Some rather larger Boulders (larger than about 10 mt in size) have already been seen on Mars by the orbiting camera.
This is a feat similar to that which can be obtained by "spy" satellites on Earth. The MOC image 53104 subframe shown here features a low, rounded Hill in South/Eastern Utopia Planitia. Each of the small, lumpy features on the top of this Hill is a Boulder.
In this picture, Boulders are not seen on the surrounding Plain. These Boulders are interpreted to be the remants of a layer of harder rock that once covered the top of the Hill, but was subsequently eroded and broken up by weathering and wind processes".MareKromium
(2 voti)
|
|
Tithonium_Chasma-PIA03968-PCF-LXTT-01.jpgFeatures of Tithonium Chasma (Absolute Natural Colors; credits for the additional process. and color: Dr Paolo C. Fienga - Lunexit Team)160 visiteCaption NASA originale:"This MGS-MOC image shows dark rippled surfaces and a patch of light-toned, perhaps sedimentary rock exposed on the floor of western Tithonium Chasma, part of the vast Valles Marineris Canyon System".
Location near: 5,0 South Lat. and 90,3 West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season Southern SpringMareKromium
(2 voti)
|
|
Terra_Cimmeria-Gullies-PIA02919-2.jpgGullies in Terra Cimmeria (Original RAW Frame)74 visiteDue splendide immagini che immortalano l'incredibile conformazione di questa Regione Marziana attraversata da canyons e crepacci.
Nell'immagine precedente, fate attenzione a non confondere - come gi fanno in molti, assecondando le "visioni" (questa volta detto in senso non positivo...) del Prof. Hoagland - i letti semi-fangosi ed in parte sabbiosi di antichi fiumi e torrenti, ora ricoperti di Side-Winders (ossa delle dune dalle forme sinuose le quali ricordano le tracce lasciate sulle sabbie da un particolare tipo di serpente) con gli ormai - tristemente - famosi "translucent tunnels" (ossa, secondo il Prof. Hoagland ed i suoi adepti) delle costruzioni in simil-plexiglas o in cristallo, del tutto analoghe ai nostri tunnels, ma con la variante che, su Marte, esse non servono ad attraversare le montagne, ma scorrono sulla superficie del Pianeta).
Cerchiature Bianche: non serve essere Geologi per vederlo: questi cracks sulla fiancata del rilievo maggiore inquadrato sono estremamente recenti.
(2 voti)
|
|
Chaotic_Terrain-Eos_Chaos-04.jpgFeatures of Eos Chaos: High Slope (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)221 visiteLocation near: 12,9 South Lat. and 49,5 West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Southern SummerMareKromium
(1 voti)
|
|
Volcanoes-Olympus_Mons_and_Tharsis_Region.jpgTharsis Region (Natural Colors; credits: NASA/MGS/MSSS)147 visite"Mars Global Surveyor's camera, MOC, provided this hemispheric view of the northern Tharsis region on June 1, 1998. This picture shows the giant volcano, Olympus Mons, and one of the Tharsis Montes volcanoes, Ascraeus Mons. Another volcano, Alba Patera, is lurking under the haze and clouds at the top of the image. Olympus Mons is about 550 Km wide.
The Terminator - such as the line that divides night and day - was located west of Olympus Mons (left part of the image). It is Winter in the northern hemisphere of Mars and the high latitudes (i.e.: north of Olympus Mons in this picture) exhibit clouds and haze. These clouds most likely contain water ice".
Non possiamo non notare l'enfasi che viene spesso posta, in sede di commento originale alle immagini, sul fatto che le nuvole Marziane "MOLTO PROBABILMENTE" (ossia "QUASI CERTAMENTE") contengono ACQUA.
E allora noi rivolgiamo alla NASA - ancora - la stessa domanda: ma siamo certi che su Marte non piove da qualche milione di anni?
Risposta? Silenzio totale
(14 voti)
|
|
Martian_Mountains-MGS-00.jpgCharitum Montes (Natural Colors; credits: NASA/MGS/MSSS)216 visiteWhat causes the unusual white color on some Martian Mountains? The answer can be guessed by noticing that the bright areas disappear as springtime takes hold in the South of Mars: dry ice. Dry CO2 ice sublimates directly to gas from its frozen state. The frosty mountains, named "Charitum Montes", have been covered with CO2 ice over the Martian Winter. The serene scene pictured above is not a photograph, but rather a computationally constructed digital illusion resulting from the fusion of two color images from the Mars Orbital Camera and topographic data from the Mars Orbiter Laser Altimeter. Both instruments operate from the Mars Global Surveyor robot spacecraft currently orbiting Mars.
(14 voti)
|
|
Volcanoes-Unnamed_Volcano-PIA06841.jpgUnnamed Small Martian Volcano (EDM - Original NASA/MGS/MSSS b/w Frame)201 visite"...This Mars Global Surveyor (MGS) image shows a small Unnamed Volcano located South/West of the giant Volcano, Pavonis Mons, near 2,5 South Lat. and 109,4 West Long. Lava Flows can be seen to have emanated from the Summit Region, which today is an irregularly-shaped Collapse Pit, or Caldera. A blanket of Dust mantles this Volcano. Dust covers most Martian Volcanoes, none of which are young or active today. This picture covers an area about 3 Km across..."
(14 voti)
|
|
Craters-Unnamed_Crater_with_Boulder_Tracks-MGS-PIA06450.jpgBoulder Tracks (Original NASA/MGS/MSSS b/w Frame)296 visiteAbbiamo visto, in altri Siti dedicati alle Anomalie Spaziali, delle immagini simili a questa (ma riferite alla Luna) in cui tracce del tutto analoghe a quelle che Vi proponiamo in questo MGS frame venivano ipoteticamente attribuite a manufatti in movimento all'interno di crateri od in prossimit di pendii. Certo, in mancanza di elementi di prova inoppugnabili, tutto possibile ed ipotizzabile, ma noi riteniamo che questo tipo di traccia sia da attribuirsi, in difetto di prova contraria, a dei macigni che rotolano a seguito di leggeri sismi o vibrazioni del suolo causate da impatti meteorici occorsi nelle vicinanze. Nemmeno da escludere la possibilit che si tratti di fenomeni di cosiddetto "Gravity Wasting".
(12 voti)
|
|
Cydonia_Region-PIA06845_modest.jpgFeatures of Cydonia Mensae Region (Original NASA/MGS/MSSS b/w Frame)240 visiteCaption NASA:"Dark, windblown Dunes on the Floor of Bamburg Crater, located in the Cydonia Region near 39,7 North Lat. and 3.2 West Long."
(11 voti)
|
|
South_Polar_Regions-Polygons-PIA05951.jpgThe "Martian Polygons" (Original NASA-MGS-MSSS b/w frame)168 visiteThis Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows "polygons" patterned ground in the South Polar region near 82.0S, 90.8W. Polygons are fairly common at high latitudes in both Martian hemispheres, but they do not occur everywhere. On Earth, features such as these would be good indicators of the presence and freeze-thaw cycles of ground ice. On Mars, the same might (emphasis on "might") also be true. This image covers an area approximately 3 Km across and is illuminated by sunlight from the upper left. Seasonal frost enhances the contrast in the scene; the darkest areas have advanced the farthest in the springtime defrosting process.
(10 voti)
|
|
Craters-Unnamed_Buried_Craters-MGS-PIA06855-00.jpgUnnamed Buried Craters in Utopia Planitia (Original NASA/MGS/MSSS b/w Frame)125 visiteCaption NASA:"This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows a cracked Plain in Western Utopia Planitia. The three circular crack patterns indicate the location of three buried Unnamed Impact Craters. These landforms are located near 41,9 North Lat. and 275,9 West Long. The image covers an area approximately 3 km (about 1,9 mi) across. Sunlight illuminates this scene from the lower left".
(9 voti)
|
|
Craters-Galle_Crater-Happy_Face_Crater-2003_05_15_M2300366.jpgGalle Crater (Natural Colors; credits: NASA/MGS/MSSS)99 visiteCaption NASA originale:"The 2 pictures shown here are taken from the same daily global image mosaic (the only difference is that each was processed slightly differently). The pictures show Galle Crater, informally known as "Happy Face," as it appeared in early Southern Winter. The white-ish gray surfaces are coated with wintertime carbon dioxide frost. The pattern of frost distribution gives the appearance that "Happy Face" has opened its mouth. Galle Crater is located on the east rim of Argyre Planitia at 51S, 31W. Sunlight illuminates the scene from the upper left. Galle Crater is about 230 Km (143 mi) across".
(18 voti)
|
|
| 512 immagini su 43 pagina(e) |
 |
|
|
|
|
|
|
40 | |
|
|
