| Piú votate - A Tribute To Mars Global Surveyor |
North_Polar_Features-Dunes-Dark_Dunes-MGS.jpgDark Dunes in Vastitas Borealis (Original NASA/JPL/MSSS b/w Frame)94 visiteCaption NASA originale:"This MGS-MOC image shows dark North Polar Dunes overlying other materials in the North Polar Region".
Location near: 79,1 North Lat. and 228,8 West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Summer
(7 voti)
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Volcanic_Features-Collapse_Pit-2003_07_12.jpgCollapse Pit in Tractus Fossae (Original NASA/MGS/MSSS b/w Frame)72 visiteCaption NASA originale:"Extensional faulting, wherein some fraction of the Martian Crust is pulled apart and Faults are formed where the Bedrock breaks, has also led to formation of Collapse Pits in the Tractus Fossae Region. This MGS-MOC image shows one such pit and the layered bedrock exposed in its walls. Dark Streaks on the Slopes of the Pit result from Avalanches of dry, fine-grained debris (probably Dust, as these streaks are only found in the dust-mantled regions of Mars).
This Pit is located near 23,5 North Lat. and 103,8 West Long. Sunlight illuminates the scene from the lower left".
(7 voti)
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Mars-01.jpgMars' Solar Longitude 145 (1) - Tharsis Region97 visiteQueste tre immagini di Marte - riprese dalla Sonda MGS (Mars Global Surveyor) - oltre ad essere estremamente belle, ci rammentano la posizione attuale del Pianeta Rosso ed il succedersi delle sue stagioni per l'AD 2005, in accordo al Sistema "LS" o della "Longitudine Solare".
Ma che cos' questo Sistema e come funziona?
La Longitudine Solare (o LS tout-court), oltre ad essere (ovviamente) un angolo, anche uno strumento di misura dell'Anno Marziano.
Marte descrive un'orbita completa attorno al Sole - ossa un giro di 360 - in "UN Anno Marziano" il quale prende avvo alla Longitudine Solare di 0 e si completa alla Longitudine Solare di 360.
Le stagioni Marziane, in accordo al "Sistema LS", si succedono nel modo seguente:
LS andante da 0 a 90 = Primavera a Nord ed Autunno a Sud
LS andante da 90 a 180 = Estate a Nord ed Inverno a Sud
LS andante da 180 a 270 = Autunno a Nord e Primavera a Sud
LS andante da 270 a 360 = Inverno a Nord ed Estate a Sud
Tutto chiaro?!?
(7 voti)
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Mars-03.jpgMars' Solar Longitude 145 (3) - Mare Cimmerium and Mare Elysium80 visitenessun commento
(7 voti)
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Souhern_Emisphere.jpgThe Southern Hemisphere of Mars (Natural Colors; credits: NASA/MGS/MSSS)124 visiteCaption NASA:"The wide angle camera view of Mars shown here was obtained by the Mars Global Surveyor Mars Orbiter Camera in late July 1999, about 1 week before the start of southern Spring. The frosty, retreating south polar cap (white) is seen in the lower quarter of the image and wisps of dust storm clouds (grayish-orange in this view) occur just above the cap at the lower left. The southernmost of the large Tharsis volcanoes, Arsia Mons, is seen at the upper left. Arsia Mons is about 350 Km across".
(7 voti)
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Phobos-Phobos_Monolith-10.jpgThe Phobos' Monoliths in context (an Image-Mosaic in Absolute Natural Colors; credits for the additional process. and color.: Marco Faccin and Paolo C. Fienga/Lunar Explorer Italia/Italian Planetary Foundation)155 visiteTanto per ricordare agli Amici "Anomaly Hunters" che di Monoliti (o, come suggeriamo noi, di "Parallelepipedal-shaped Ejecta Boulders"), su Phobos, ce ne sono ALMENO due. E comunque, se proprio vogliamo parlare di Anomale, potremmo discutere non solo (e non tanto!) della forma dei due rilievi controversi ed indicati da una freccia, quanto della loro (straordinaria ed inspiegabile, oltre che totalmente fuori contesto, a nostro parere) Albedo...MareKromium
(6 voti)
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Volcanoes-The_FootPrint_Volcano-A-MGS-PCF-LXTT-IPF.jpgThe "Footprint" Volcano (Absolute Natural Colors; credits for the additional process. and color.: Drr Don P. Mitchell and Paolo C. Fienga - Lunexit Team)100 visiteThis NASA - Mars Global Surveyor (MGS) - Mars Orbiter Camera (MOC) High Resolution image, acquired on the date of July, 13, 2003, shows a small, Dust-covered and so far - officially - Unnamed Volcano (note: the nickname "Footprint" has been given to this Surface Feature by the Researchers of the Italian Planetary Foundation) that is located on the Volcanic Plains to the East of the Giant Martian Volcano, Pavonis Mons.
It is interesting to notice that the Floor of the Caldera - such as the elliptical depression visible at the Summit of the Volcano - has a few windblown Ripples on it. The Ripples and the extremely thick Dust Mantle, together with a number of small Impact Craters located on its Surface, are signs which indicate that the "Footprint" Volcano erupted a VERY long time ago, and that there has been no more activity in (geologically speaking) recent times. In addition to the above, we also wish to underline that, while the Surface surrounding the Footprint Volcano has kept, despite the eons of volcanic idleness, a dark gray color (such as the typical colors of Lava, once is cooled off, and Volcanic Ashes), the Land that is farther away from the Volcano has maintained (or maybe re-gained?) the typical brown-orange color which characterizes most of the Equatorial and Peri-Equatorial Surface of Mars. This image covers an area approx. 3 by 6,8 Km wide (such as approx. 1,9 by 4,2 miles). The Footprint Volcano is located near 1,6 South Lat. and 105,7 West Long.; the Sunlight illuminates the scene from the South.
The frame has been colorized in Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - Mars Global Surveyor Orbiter and then looked down, towards the Surface of Mars), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team.MareKromium
(6 voti)
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Noachis_Terra-M0705535-01.jpgBizarre-looking Surface Features of Southern Noachis Terra (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)194 visitenessun commentoMareKromium
(6 voti)
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Utopia_Planitia-PIA07839.jpgPolygons in Utopia Planitia (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)245 visiteCaption NASA originale:"This MGS-MOC image shows a typical view of Polygon-cracked and Pitted Surfaces unique to Western Utopia Planitia. No other place on Mars has this appearance. Some Mars scientists have speculated that ground ice may be responsible for these landforms".
Location near: 42,3 North Lat. and 275,6 West Long.
Image width: ~3 Km (~1,9 mi)
Illumination from: lower left
Season: Northern SummerMareKromium
(6 voti)
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Craters-Kaiser_Crater-PCF-LXTT-01.jpgKaiser Crater (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team) 175 visiteOriginal caption:"As the MGS Primary Mission drew to an end, the Southern Hemisphere of Mars was in the depths of Winter. At high latitudes, it is dark most - if not all - of the day. Even at middle latitudes, the Sun shines only thinly through a veil of Water and Carbon Dioxide Ice Clouds and the ground is so cold that Carbon Dioxide Frosts have formed. Kaiser Crater (located at approx. 47 South Latitude and 340 West Longitude) is one such place. At a latitude comparable to Seattle, Washington, Duluth, Minnesota, or Helena, Montana, Kaiser Crater is studied primarily because of the sand Dunefield found within the confines of its Walls (lower center of the MOC image). The normally dark-gray or blue-black sand can be seen in this image to be shaded with light-toned frost. Other parts of the Crater are also frosted (...)".
MareKromium
(6 voti)
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Volcanoes-Olympus_Mons-MGS-2003_09-PCF-LXTT-00.jpgOlympus Mons (Absolute Natural Colors; credits for the additional process. and color: Dr Paolo C. Fienga - Lunexit Team)282 visiteCaption originale: "This is a red camera wide angle view of the Giant Martian Volcano, Olympus Mons, acquired by the Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC). The Volcano is large enough to cover much of the state of New Mexico. This view was taken looking West toward the Sunward Limb of the Planet. The limb is the horizon to the left; the dark band is outer space. Sunlight illuminates this scene from the lower left". MareKromium
(6 voti)
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North_Polar_Cap-M0105057-PCF-LXTT.jpgFrame M0105057 - The North Polar Cap (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)258 visitenessun commentoMareKromium
(6 voti)
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