| Piú votate - A Tribute To Mars Global Surveyor |
Volcanic_Features-Pits-Ascraeus_Mons-PIA07313-01.jpgAscraeus Mons' Pit Chain (EDM/HD - Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)119 visiteCaption NASA originale:"This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows Collapse Pits on the Northern Flank of the giant Tharsis Shield-Volcano, Ascraeus Mons. Details in Rock and Dust are seen when this image is examined at its full, 1,5 meters (5 ft) per pixel resolution. Large, dark Boulders occur on the Floors of some of the Pits, for example. This scene is located near 13,1° North Lat. and 103,1° West Long. The picture covers an area of about 3 Km (such as approx. 1,9 mi) wide". 
(9 voti)
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North_Polar_Regions-The_Erg-PIA07282.jpgOutcrops in the North polar Erg (Original NASA/MGS/MSSS b/w Frame)82 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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Volcanic_Features-Pits-Ascraeus_Mons-PIA07313-03.jpgAscraeus Mons' Pit Chain (Original HD NASA/MGS/MSSS b/w Frame)116 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)148 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 Borealis237 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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Phobos-Phobos_Monolith-03.jpgThe "Phobos' Monolith" (EDM n.2)1263 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.
(52 voti)
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Earth_and_Moon_from_Mars-00.jpgEarth and Moon from Mars93 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)106 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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North_Polar_Features-Polygons-PIA07354-0.jpgNorth Polar "Polygons" (Original NASA/MGS/MSSS b/w Frame)71 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)70 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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Martian_Eclipse-moc2_msss_3shadow100-00.jpgMOC Views of Martian Solar Eclipses (Original NASA/MGS/MSSS b/w Frame)102 visiteThe shadow of the martian moon, Phobos, has been captured in many recent wide angle camera views of the red planet obtained by the Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC). Designed to monitor changes in weather and surface conditions, the wide angle cameras are also proving to be a good way to spot the frequent solar eclipses caused by the passage of Phobos between Mars and the Sun.This picture shows three samples of MOC's global image swaths, each in this case with a shadow of Phobos visible (arrow). The first scene (left) was taken on September 1, 1999 and shows the shadow of Phobos cast upon southern Elysium Planitia. The large crater with dark markings on its floor at the lower right corner is Herschel Basin. The second scene shows the shadow of Phobos cast upon northern Lunae Planum on September 8, 1999. Kasei Valles dominates the upper right and the deep chasms of Valles Marineris dominate the lower third of the September 8 image. The picture on the right shows the shadow of Phobos near the giant volcano, Olympus Mons (upper left), on September 25, 1999. Three other major volcanoes are visible from lower-center (Arsia Mons) and right-center (Pavonis Mons) to upper-middle-right (Ascraeus Mons).
(7 voti)
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South_Polar_Regions-South_Pole.jpgThe South Pole of Mars (Natural Colors; credits: NASA/MGS/MSSS)197 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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