| Piú votate - A Tribute To Mars Global Surveyor |
Northern_Regions-Mesas-MGS.jpgMesas in Vastitas Borealis (Original NASA/MGS/MSSS b/w frame)53 visiteCaption NASA originale:"This MGS-MOC image shows two mesas on the Northern Plains of Mars. "Mesa" is the Spanish word for "table" and that is a very good description of the two elliptical features captured in this MOC image. In both cases, the Mesa tops and the material beneath them, down to the level of the surrounding, rugged Plain, are remnants of a once more extensive layer (or layers) of material that has been largely eroded away. The circular feature near the center of the larger Mesa is the site of a filled and buried Impact Crater".
Location near: 53,5° North Lat. and 153,5° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring
(3 voti)
|
|
North_Polar_Features-North_Polar_Scarp-MGS-00.jpgNorth Polar Panorama (Original NASA/MGS/MSSS b/w Frame)57 visiteCaption NASA originale:"This MGS-MOC image shows a steep slope in the North Polar Region of Mars. The stripes indicate an exposure of layered material; the variations in brightness among the stripes are the result of varying amounts and textures on seasonal Carbon Dioxide (CO2) frost. At the time the image was acquired - such as in June 2006 -, the Carbon Dioxide frost was beginning to sublime way, leaving a variety of different patterns in frost distribution".
Location near: 85,2° North Lat. and 122,7° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring
(3 voti)
|
|
Craters-Unnamed_Crater.jpgOn the edge... (Original NASA/MGS/MSSS b/w Frame)67 visiteCaption NASA originale:"This MGS-MOC image shows gullies on the Wall of a Martian South Mid-Latitude Unnamed Impact Crater. The Channels in each Gully head beneath an eroding overhang of layered rock, providing support for the hypothesis that some (if not all) Martian Gullies result from release of groundwater to the Surface".
Location near: 33,0° South Lat. and 213,4° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Autumn
(3 voti)
|
|
Troughs-Labeatis_Fossae-MGS.jpgDeep Trough in Labeatis Fossae (Original NASA-MGS-MSSS b/w Frame) 53 visiteCaption NASA originale:"This MGS-MOC image shows a portion of a trough cutting across a dust-covered plain in the Labeatis Fossae Region of Mars. Boulders derived from the layered exposures near the top of the trough walls are resting on the floor, and in some locations, the sloping sidewalls of the dusty trough".
Location near: 22,1° North; 94,5° West
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring
(3 voti)
|
|
Craters-Galle_Crater-3D.jpgLayers of Galle Crater (3D - credits: NASA/JPL/MSSS)54 visiteCaption NASA:"This is a 3-D stereo anaglyph showing layers in Galle Crater. This anaglyph uses two MGS-MOC images acquired at slightly different viewing angles: MOC images E22-01557 and M14-02055. Owing to the specifics of the viewing geometry, the image is tilted on its side, relative to the mosaic shown in the 15 June 2006 release. In other words, in this image, North is toward the right and West is up. This anaglyph, when viewed in conjunction with the 15 June 2006 mosaic of these layers, provides a more complete sense of the cross-cutting relations between layers in the mound located in southern Galle (Happy Face) Crater. The layers are part of a mound of sedimentary rock in southern Galle — a remnant of a once more-extensive deposit of sedimentary material in this south mid-latitude impact basin.
Location near: 52,3° South Lat. and 30,1° West Long.
Image width: ~7,3 Km (~4,5 mi)
Illumination from: upper right
Anaglyph from MOC images: E22-01557 and M14-02055
(3 voti)
|
|
North_Polar_Features-Dunes-MGS-03.JPGNorth Polar Dunes (Original NASA/MGS/MSSS b/w Frame)65 visiteCaption NASA originale:"This MGS-MOC image shows dunes covered with a seasonally-deposited layer of solid Carbon Dioxide (CO2) in the North Polar Region of Mars. The dark spots indicate areas where the CO2 frost has begun to change, either by being sublimed away, or by becoming rougher or coarser-grained, such that it appears darker than surrounding frost. Over the course of the Spring season, the frost will be completely removed and the dark sands that make up the dune field will be visible by Summer".
Location near: 77,7° North; 41,7° West
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Spring
(3 voti)
|
|
Clouds-Hellas_Planitia-MGS.JPGHeavy Dusty Clouds obscuring Hellas Planitia (Original NASA/MGS/MSSS b/w Frame)53 visiteCaption NASA originale:"This MGS-MOC image shows billowing clouds of dust rising from a storm South-East of Hellas Planitia.
The dust storm in this case obscured the Mars Orbiter Camera's view of the Martian Surface".
Location near: 62,2° South; 259,0° West
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Autumn
(3 voti)
|
|
South_Polar_Features-Residual_Cap.JPGSouth Polar "Shoreline" (Original NASA/MGS/MSSS b/w Frame)63 visiteCaption NASA originale:"This MGS-MOC image shows the very edge of the South Polar Residual Cap of Mars. The bright areas, which appear somewhat like pieces of sliced "Swiss cheese", are composed mainly of frozen Carbon Dioxide. The Scarps around the edges of the Carbon Dioxide mesas have been retreating at a rate of roughly 3 mt (~3 yards) per Martian Year; in this case, exposing a darker surface that lies below".
Location near: 85,4° South; 88,6° West
Image width: ~3 km (~1,9 mi)
Illumination from: upper left
Season: Southern Summer
(3 voti)
|
|
Channels-Evros_Vallis-MGS.JPGEvros Vallis (Original NASA/MGS/MSSS b/w Frame)57 visiteCaption NASA originale:"This MGS-MOC image shows a small portion of Evros Vallis, an ancient Channel located South of the large Impact Basin, Schiaparelli. In this image, the Walls and Floor of the Valley, as well as the adjacent upland, are all mantled by Dust. In addition to the Dust Mantle, large, windblown Ripples occur in low-lying areas, particularly on the Valley Floor. The Ripples, also, have been covered by Dust".
Location near: 12,7° South Lat. and 346,7° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Autumn
(3 voti)
|
|
South_Polar_Features-Swiss_Cheese_Terrain-04.jpgThe "drawings" of the South Polar Residual Cap (2)58 visitenessun commento
(3 voti)
|
|
South_Polar_Features-Swiss_Cheese_Terrain-03.jpgThe "drawings" of the South Polar Residual Cap (1)53 visiteCaption NASA originale:"This MGS-MOC image shows a Summertime view of the South Polar Residual Cap of Mars. In this image, mesas composed largely of solid Carbon Dioxide are separated from one another by irregularly-shaped depressions. The variation in brightness across this scene is a function of several factors including, but not limited to, varying proportions of dust and solid Carbon Dioxide, undulating topography, and differences in the roughness of the slopes versus the flat surfaces".
Location near: 86,7° South; 343,3° West
Image width: ~3 Km (~1,9 mi)
Illumination from: upper left
Season: Southern Summer
(3 voti)
|
|
South_Polar_Features-Swiss_Cheese_Terrain-02.jpgSummertime at the South Pole (2)53 visitenessun commento
(3 voti)
|
|
| 511 immagini su 43 pagina(e) |
 |
|
|
|
|
30 | |
|
|
|
|
