| Piú votate - Mariner, Viking & MGS's Maps & Mars in the '70s |
O-Mariner9-01.jpgMars from Mariner 9: Craterland...88 visitenessun commento
(11 voti)
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ZE-I-Viking1-vlpan22.jpgFrom the "Viking Archive" - Viking 1: surroundings187 visitenessun commento
(11 voti)
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N-Mariner7-06_enf_69.jpgMars from Mariner 7: approaching Mars (6)74 visitenessun commento
(10 voti)
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N-Mariner7-07_pmf_72.jpgMars from Mariner 7: approaching Mars (7)75 visitenessun commento
(10 voti)
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N-Mariner7-08_pmf_86.jpgMars from Mariner 7: approaching Mars (8)73 visitenessun commento
(10 voti)
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N-Mariner7-05_enf_59.jpgMars from Mariner 7: approaching Mars (5)73 visitenessun commento
(10 voti)
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ZD-Z-VikingLander1-Rocks.2jpg.jpgThe surroundings of Viking 1 Lander (1)170 visiteCommenti originali:"These pictures show a knobby exposure of bedrock broken by vertical fractures. Some of the protuberances are so deeply eroded that they almost form detached boulders. Indeed, we believe that many of the boulders at this site form by this mechanism of "in situ" weathering. The area of bedrock is more clearly delineated. Horizontal rock surfaces have been swept clear of sediment. The fact that this rock weathers in a different fashion than the rocks displayed in other frames suggest a compositional difference between the two exposures of bedrock. However, both rock types are believed to be representative of volcanic lavas that inundated the entire region early in Martian history.
Finding bedrock at this landing site was a surprise. Among other things, it indicates that Martian geologic history is more complex than Lunar history. If a thick layer of ejected deposits once covered this region, it has been subsequently removed by wind, water, or maybe even ice in the form of glaciers".
(10 voti)
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ZD-Z-VikingLander1-Rocks.jpgThe surroundings of Viking 1 Lander (2)152 visiteCommenti originali:"Bedrock exposures are among the most provocative features at the Viking 1 landing site. Bedrock, of course, refers to a body of solid rock that underlies a layer of soil or unconsolidated sediment. On the Moon, bedrock is almost everywhere covered by a thick layer of impact debris. Only at the Apollo 15 site were astronauts Dave Scott and Jim Irwin able to chip off samples of bedrock from layers exposed in the wall of the Hadley Rille".
(10 voti)
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N-Mariner7-09_enn_21.jpgMars from Mariner 7: Craters and Ridges73 visitenessun commento
(9 voti)
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N-Mariner7-01_cof_03c.jpgMars from Mariner 7: approaching Mars (1)74 visitenessun commento
(9 voti)
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O-Mariner9-04.jpgMars from Mariner 9: the North Pole of Mars83 visitenessun commento
(9 voti)
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ZI-Viking2-Rocks.jpgHorizon (3)149 visiteCommenti originali:"The following frames are 2 views of the same area in front of the spacecraft looking toward the North to Northeast, both taken with camera 2 but at different times of day. Linear accumulations of fine grained sediment have planar surfaces that are sharply delineated by shadow and reflected light. The small pyramidal rock in the lower left is a good example of a ventifact, a rock with multiple facets eroded by the wind".
(9 voti)
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