| Piú votate - A Tribute To Mars Global Surveyor |
North_Polar_Regions-The_Erg-PIA07282.jpgOutcrops in the North polar Erg (Original NASA/MGS/MSSS b/w Frame)80 visiteCaption NASA originale:"This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image, acquired during Northern Summer in December 2004, shows dark, windblown Sand Dunes in the North Polar Erg: a vast Sea of Sand Dunes that surrounds the North Polar Cap. These landforms are located near 80,3° North Lat. and 144,1° West Long. Light-toned features in the image are exposures of the substrate that underlies the immense Erg. The image covers an area of about 3 Km (1,9 mi) wide and is illuminated by sunlight from the lower left".
Nota Lunexit: le "light-toned features", a nostro avviso, sono soltanto degli affioramenti rocciosi (Rocky Outcrops). 
(9 voti)
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Martian_Eclipse-moc2_msss_3shadow100-01.jpgMOC Views of Martian Solar Eclipses (Original NASA/MGS/MSSS - Natural Color Frame)126 visiteThis picture shows wide angle red (left), blue (middle) and color composite (right) views of the shadow of Phobos (elliptical feature at center of each frame) as it was cast upon western Xanthe Terra on August 26, 1999, at about 2 p.m. local time on Mars. The image covers an area about 250 Km (155 miles) across and is illuminated from the left. The meandering Nanedi Valles is visible in the lower right corner of the scene. Note the dark spots on three crater floors - these appear dark in the red camera image (left) but are barely distingished in the blue image (middle), while the shadow is dark in both images. The spots on the crater floors are probably small fields of dark sand dunes.
(9 voti)
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Volcanic_Features-Pits-Ascraeus_Mons-PIA07313-03.jpgAscraeus Mons' Pit Chain (Original HD NASA/MGS/MSSS b/w Frame)112 visitenessun commento
(13 voti)
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Controversial_Features-The_D_M_Pyramid-02.jpgThe D&M Pyramid (Original NASA/MGS/MSSS b/w Frame)147 visiteCaption NASA originale:"The mosaics shows a Cydonia landform popularly known as the "D&M Pyramid." It is located near 40.7°N, 9.6°W. Although it is not really shaped like a pyramid, the Cydonia landform is 1 of thousands of massifs, buttes, mesas, knobs and blocks that mark the transition from the far northwestern Arabia Terra cratered highlands down to the northeastern Acidalia Planitia lowlands. Each block, whether shaped like a face, a pyramid, or simply a mesa, massif or knob, is a remnant of the bedrock of northeastern Arabia that was left behind as erosion slowly degraded the terrain along this zone between the highlands and the lowlands. A few outcroppings of layers in this ancient bedrock can be seen in the mosaic of the pyramid-like landform shown here; much of the landform is covered with eroded mantling material that was deposited long after this highlands remnant became an isolated feature in Cydonia".
Lunar Explorer, questa volta, concorda pienamente con quanto riportato nella caption NASA.
(8 voti)
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Vastitas_Borealis-M0306518.jpgThick Cloud-Front over Vastitas Borealis233 visiteLongitude of image center: 23,58° West
Latitude of image center: 71,21° North
Scaled pixel width: 268,79 meters
Scaled image width: 130,93 Km
Scaled image height: 114,11 Km
Solar Longitude (Ls): 181,47°
Local True Solar Time: 14,20 decimal hours
Emission Angle: 3,73°
Incidence Angle: 74,99°
Phase Angle: 72,60°
North Azimuth: 97,66°
Sun Azimuth: 312,21°
Spacecraft Altitude: 430,36 Km
Slant Distance: 431,17 KmMareKromium
(4 voti)
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Earth_and_Moon_from_Mars-00.jpgEarth and Moon from Mars90 visiteCaption originale:"This is the first image of Earth ever taken from another planet that actually shows our home as a planetary disk. Because Earth and the Moon are closer to the Sun than Mars, they exhibit phases, just as the Moon, Venus, and Mercury do when viewed from Earth. As seen from Mars by MGS on 8 May 2003, Earth and the Moon appeared in the evening sky. The MOC Earth/Moon image has been specially processed to allow both Earth (with an apparent magnitude of -2.5) and the much darker Moon (with an apparent magnitude of +0.9) to be visible together. The bright area at the top of the image of Earth is cloud cover over central and eastern North America. Below that, a darker area includes Central America and the Gulf of Mexico. The bright feature near the center-right of the crescent Earth consists of clouds over northern South America. The image also shows the Earth-facing hemisphere of the Moon, since the Moon was on the far side of Earth as viewed from Mars.The slightly lighter tone of the lower portion of the image of the Moon results from the large and conspicuous ray system associated with the crater Tycho.
(18 voti)
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Craters-Galle_Crater-Happy_Face_Crater-MGS-2.jpgGalle Crater (Saturated Natural Colors; credits: NASA/MGS/MSSS)104 visiteIl nome che è stato dato al cratere qui ripreso dal Mars Global Surveyor spiega già tutto: da questa angolazione, infatti, si potrebbe dire che un dotato burlone sia andato a disegnare un bel "viso sorridente" sulla superficie di Marte. Ovviamente si tratta di un semplice effetto ottico determinato dalla particolare prospettiva in cui si trovava la Sonda rispetto al cratere nel momento della ripresa.
Eppure - credeteci! - c'è stato qualcuno che ha pensato che questa "Faccia Felice" fosse un altro degli enigmatici "Monumenti di Marte", dopo la Sfinge e le Piramidi di Cydonia Mensae.
(18 voti)
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Phobos-Phobos_Monolith-03.jpgThe "Phobos' Monolith" (EDM n.2)1258 visiteUn'ultima curiosità: dopo aver visto e studiato le "Anomalie" di Marte dobbiamo dire che anche Phobos non è da meno. Guardate attentamente quest'immagine e cercate di rispondere ad una semplice domanda: cos'è quella colonna a pianta triangolare che si staglia, perfettamente verticale, sulla superficie del Satellite? Noi abbiamo pensato al Monolito di "2001: Odissea nello Spazio" ma la verità è che si tratta di un altro mistero che, forse, resterà tale.
(50 voti)
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North_Polar_Features-Polygons-PIA07354-0.jpgNorth Polar "Polygons" (Original NASA/MGS/MSSS b/w Frame)68 visiteCaption NASA originale:"This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows Polygons formed in ice-rich material in the North Polar Regions of Mars. The bright surfaces in this image are covered by a thin Water Ice Frost".
(7 voti)
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Craters-Unnamed_Craters_with_Sedimentary_Rock_Outcrops-PIA07127-00.jpgSedimentary Rocks (Original NASA/MGS/MSSS b/w Frame)69 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".
(7 voti)
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South_Polar_Regions-South_Pole.jpgThe South Pole of Mars (Natural Colors; credits: NASA/MGS/MSSS)196 visiteCaption NASA:"During Spring, the Ice Cap - predominantly formed by layers of frozen carbon dioxide (dry ice) plus some water ice - begins to shrink as the ices change directly from solid to gas (cosiddetta "sublimazione"). Hazy clouds of ice crystals and fog extend across the bottom of the picture and a darker, more defrosted area, is visible at the upper right, near the Red Planet's night side".
(16 voti)
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Earth_and_Moon_from_Mars-01.jpg"Us", from Mars (EDM)91 visitevedi il commento al frame precedente
(19 voti)
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