| Piú viste - A Tribute To Mars Global Surveyor |
Acidalia_Planitia-Unusual_Landforms-M0300102-PCF-LXTT-00.jpgUnusual Landforms in Acidalia Planitia (CTX Frame - Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)138 visitenessun commentoMareKromium
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Craters-Unnamed_Crater_in_Terra_Tyrrhena-MGS-04.jpgUnnamed Crater and Dunes in Terra Tyrrhena (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team138 visitenessun commentoMareKromium
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South_Polar_Regions-Polygons-PIA05951.jpgThe "Martian Polygons" (Original NASA-MGS-MSSS b/w frame)136 visiteThis Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows "polygons" patterned ground in the South Polar region near 82.0°S, 90.8°W. 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.
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Craters-Unnamed_Crater_in_Chrise_Planitia-PIA07304.jpgUnnamed Crater in Chrise Planitia (Original NASA/MGS/MSSS b/w Frame)136 visiteCaption NASA originale:"This MGS-MOC image shows an impact crater in Chryse Planitia, not too far from the Viking 1 Lander site, that seems to resemble a bug-eyed head. The 2 odd depressions at the north end of the crater (the "eyes") may have formed by wind or water erosion. This Region has been modified by both processes, with water action occurring in the distant past via floods that poured across western Chryse Planitia from Maja Valles, and wind action common occurrence in more recent history. This crater is located near 22.5°N, 47.9°W". Che dire? Forse gli Alieni (diremmo che in questo caso potrebbe trattarsi dei "Grigi"...) non solo posseggono "tecnologia e senso artistico" ma anche un cospicuo "senso dell'umorismo": solo così, infatti, potremmo spiegare un simile "autoritratto"!
Scherzi a parte, in questo MGS frame è ripresa un'opera della Natura davvero incredibile e che, sicuramente, qualcuno interpreterà alla stregua della "Sfinge di Cydonia".
Naturale o Artificiale? That is the question...
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Acidalia_Planitia-Unusual_Landforms-M0300102-PCF-LXTT-02.jpgUnusual Landforms in Acidalia Planitia (EDM n.2 - Enhanced Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)136 visitenessun commentoMareKromium
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Martian_Mountains-MGS-01.jpgCharitum Montes (Natural Colors; credits: NASA/MGS/MSSS)134 visiteCaption originale: "This is a perspective view of the Charitum Montes, the Mountain Range that bounds Southern Argyre Planitia, created by combining red and blue Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) wide angle images with topography from the MGS Mars Orbiter Laser Altimeter (MOLA). Carbon dioxide frost coats some of the hills, craters, and mountainsides in this southern springtime image. The picture is located near 57° South Lat. and 43°West Long. North is toward the top, South toward the bottom. Sunlight illuminates the scene from the upper left. The area shown is about 355 Km. A smaller portion of this image was previously released in July 2003 as "Frosty Mountains."
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Volcanic_Features-Plume-Tharsis-PIA04285.jpgAn isolated "Water Ice Cloud" over Tharsis or a volcanic "Plume"? (Saturated Natural Colors; credits: NASA/JPL/MSSS)134 visiteOriginal caption:"This composite of red and blue MGS-MOC daily global images acquired on 6 July 2005 shows an isolated water ice cloud extending more than 30 Km (more than 18 miles) above the Martian surface. Clouds such as this are common in late Spring over the terrain located South-West of the Arsia Mons volcano. Arsia Mons is the dark, oval feature near the limb, just to the left of the "T" (in the "Tharsis Montes" label).
The dark, nearly circular feature above the "S" (in "Tharsis") is the Pavonis Mons Volcano and the other dark circular feature, above and to the right of "S" in "Montes," is Ascraeus Mons.
Illumination is from the left/lower left.
Season: Northern Autumn/Southern Spring".
Nota: purtroppo non ci sono vulcanologi nel Gruppo Lunar Explorer, ma la sensazione (nulla di più) che la "isolata nuvola di ghiaccio d'acqua", come la chiama la NASA sia, in realtà, il residuo di un evento vulcanico, è molto intensa (confrontate la sua forma con qualcuna delle "volcanic plumes" di Io...).
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Phobos_from_Mgs-011.jpgMartian Limb and Phobos (Natural Colors; credits: NASA/MGS/MSSS)132 visiteUna spettacolare veduta del bordo ("limb") di Marte e della sua luna "misteriosa", Phobos, la quale costituisce anche uno degli oggetti più "bui" dell'intero Sistema Solare. Ecco il commento originale a questa immagine:
"Phobos is one of the darkest objects in the Solar System. Thus, 4 wide angle images were obtained to make the picture of Phobos over the martian limb: a pair of red and blue wide angle images was acquired for the limb and a pair of separate images were required to see Phobos. The wide angle images illustrate the fact that Phobos is mostly colorless (dark gray); the faint orange/red hue in the wide angle picture is a combination of slight differences in the focal lengths of the blue and red cameras and the orange/red illumination provided by reflection of sunlight off Mars. To a person standing on Phobos, the Red Planet would fill most of the sky".
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Volcanoes-Olympus_Mons_and_Tharsis_Region.jpgTharsis Region (Natural Colors; credits: NASA/MGS/MSSS)132 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" (ossìa "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.
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Craters-Tikhonravov_Crater-PIA03962-01.jpgSedimentary Rocks inside Tikhonravov Crater - Arabia Terra (Saturated Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)131 visiteCaption NASA originale:"This MGS-MOC image shows Layered Sedimentary Rocks exposed by erosion, then mantled by Dust, in Tikhonravov Crater in central Arabia Terra. Dark Slope Streaks occur where some of the Dust has slid down the layered Slopes".
Location near: 13,8° North Lat. and 324,8° West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern AutumnMareKromium
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Martian_Eclipse-moc2_msss_3shadow100-01.jpgMOC Views of Martian Solar Eclipses (Original NASA/MGS/MSSS - Natural Color Frame)130 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.
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Utopia_Planitia-Smoke-D-M0202863-PCF-LXTT.jpgControversial Surface Feature in Utopia Planitia (EDM n.2)130 visiteUn irrequieto camino vulcanico si nasconde al di sotto di questo cratere e sta dando chiari segnali di risveglio? Oppure si tratta di fumi esausti che arrivano da un'installazione sotterranea?
O magari è un'illusione ottica e quello che appare come uno sbuffo di fumo nero è solo un dark wind-streak, come ne abbiamo già visti tanti su Marte e Venere?
Domande, domande, domande...
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