| Piú viste - A Tribute To Mars Global Surveyor |
Z-01-20130618_S23_00831sub.gifEnd of Transmissions (EDM)112 visiteMars Global Surveyor was the first successful U.S. Mission launched to Mars since the Viking Missions in 1976. After a 20-year absence at the planet, Mars Global Surveyor ushered in a new era of Mars exploration with its five science investigations. Mars Global Surveyor arrived at Mars on September 11, 1997 (September 12, UTC), and has contributed a multitude of findings, including signs of past, persistent water such as an ancient delta and currently active water features in the gullies of canyon walls. After nearly a decade of discovery, MGS went silent in November, 2006.MareKromium
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Craters-Newton_Crater-01-42S_158W_30.jpgGullies inside Newton Crater - Terra Sirenum (Natural Colors; credits: NASA/MGS/MSSS)108 visiteCaption NASA originale:"This picture shows gullies in a crater at 39.0°S, 166.1°W and it is one of the highest-resolution images ever obtained from Mars. Also in this case the resolution is 1,5 meters (5 feet) per pixel".
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Terra_Meridiani-E0200373-02.jpgBizarre-looking Features in Terra Meridiani (Original NASA/MGS/MSSS b/w M0705535 - EDM n.2)107 visitevedi i commenti svolti in precedenza
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South_Polar_Features-Thawing_Time.gifThawing (GIF-Movie; credits for the additional process.: Mars Unearthed)107 visitenessun commentoMareKromium
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Craters-Unnamed_Buried_Craters-MGS-PIA06855-00.jpgUnnamed Buried Craters in Utopia Planitia (Original NASA/MGS/MSSS b/w Frame)106 visiteCaption NASA:"This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows a cracked Plain in Western Utopia Planitia. The three circular crack patterns indicate the location of three buried Unnamed Impact Craters. These landforms are located near 41,9° North Lat. and 275,9° West Long. The image covers an area approximately 3 km (about 1,9 mi) across. Sunlight illuminates this scene from the lower left".
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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.
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Souhern_Emisphere.jpgThe Southern Hemisphere of Mars (Natural Colors; credits: NASA/MGS/MSSS)104 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".
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Dunes-Dark_Dunes-Chasma_Boreale-PIA07350-00.jpgDark Dunes in Chasma Boreale (Original NASA/JPL/MSSS b/w Frame)103 visiteCaption NASA originale:" This MGS-MOC image shows Dark Sand Dunes overlying an eroded, layered substrate in Chasma Boreale, amid the materials of the Martian North Polar Cap.
Location near: 84,5° North Lat. and 358,3° West Long.
Image width: ~3,0 Km (~1,9 mi)
Illumination from: lower left
Season: Northern Summer".
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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).
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Chaotic_Terrain-Iani_Chaos-MGS.jpgFeatures of Iani Chaos (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)100 visitenessun commentoMareKromium
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Volcanoes-Arsia_Mons.jpgArsia Mons with Water-Ice Clouds and the shadow of Phobos (credits NASA/JPL/MSSS)99 visiteCaption originale:"This pair of MGS-MOC color images shows early Autumn Clouds over the Arsia Mons Volcano, plus the shadow of the innermost of the Martain Moon Phobos. The picture on the left is taken from the MOC daily global map acquired at 7,5 km (~4,7 mi) per pixel on 28 January 2006, about a week after the start of Southern Autumn.
The picture on the right was taken at the same time, but at a higher resolution of 489 mt (~1604 ft) per pixel.
Both pictures are composites of MOC red and blue wide angle images, and both are oriented such that North is up and East is to the right. Arsia Mons and the other large Tharsis volcanoes commonly develop afternoon orographic (i.e., topographically-controlled) water ice clouds at this time of year. The equatorial Tharsis volcano, Pavonis Mons, is also under a deck of Water-Ice Clouds; it is located toward the upper right corner of the left, lower-resolution image.
Sunlight glints off the dusty Surface and the Clouds and Aerosols in the Atmosphere, producing the bright diagonal Streak located just South/East (lower right) of Arsia Mons. A Water-Ice Haze is seen on the left side of the lower-resolution image. The dark oval to the North-East of Arsia Mons, as noted above, is the shadow of Phobos".
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Craters-Unnamed_Crater_with_Dark_Streaks-2003_08.jpgDark Slope Streaks on the edge of an Unnamed Crater (Saturated Natural Colors; credits: NASA/MGS/MSSS)98 visiteCaption NASA originale:"This June 2003 MGS-MOC image shows a crater rim mantled with fine dust near 7.6°N, 171.8°W. Occasional avalanches of dust have created dark streaks that are tapered at their source and broaden downslope.
A suite of particularly large streaks are seen in the lower right quarter of the picture. The MOC narrow angle camera does not take color images; this full-resolution (1,5 m/pixel; 5 ft/pixel) picture has been "colorized" using data from a previous color image of Mars.
Sunlight illuminates this scene from the lower left".
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