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APOLLO 16 AS 16-120-19268.jpgAS 16-120-19268 - King Crater53 visiteThe similarity in appearance of the Southern part of the central peak and the slump terraces on the Southern wall of the crater is emphasized in this oblique view of the crater King.
The parallelism of the two arms of the central peak and the Southern segment of the peak suggests that the unique shape of the structure is caused by a preexisting tabular body that was excavated during the formation of the crater.
Numerous comical structures with summit pits are present on the crater floor in the lower right part of the photograph.
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APOLLO 17 AS 17-2444.jpgAS 17-2444 - Mare Imbrium & Copernicus Crater53 visiteThis oblique view across southern Mare Imbrium looks toward Copernicus, the large crater near the horizon. The distance from the lower edge of the picture to the center of Copernicus is 400 km. The mountains at the edge of Mare Imbrium are the Montes Carpatus, and the large crater near the center of the picture is Pytheas, almost 19 km in diameter. Copernicus is one of the youngest of the Moon's large craters. It is visible from Earth, even without the aid of a telescope because of its bright ejecta blanket and its extensive bright rays. The many chains and clusters of small irregular craters and the many bright streaks or rays extending across Mare Imbrium are caused by the secondary impact of debris ejected from Copernicus. The viewing angle accentuates the radial pattern of the secondary impact features. The Sun angle is sufficiently low to show their relief, but high enough to show the contrast between the bright streaks and the normal dark mare surface. As in figure 124, herringbone ridges point toward the primary crater, and the flaring sides of the secondary craters point away from it. The arrow midway between Copernicus and the left edge of the photograph points to a less common pattern of secondary craters; these are concentric to Copernicus.
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APOLLO 17 AS 17-2773.jpgAS 17-2773 - Overlapping Craters53 visiteThis pair of overlapping medium-sized craters illustrates some of the criteria used to determine relative ages: material ejected from the larger polygonal crater on the left partially fills the smaller crater on the right; thus, the crater on the left is younger. Furthermore, the wall of the large crater is complete, whereas the West wall of the smaller crater is absent, obviously having been destroyed by the larger crater.
Even if the 2 craters did not overlap, the sharp rim, terraced walls and prominent central peak of the larger crater clearly identify it as the younger of the two. The frames used in the stereogram were selected to show exaggerated relief, a technique very helpful to photointerpreters in determining shapes and relative elevations of surface features.
These 2 craters are located in the rugged terrain of the Far-Side highlands, approx. 250 Km north of Tsiolkovsky.
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APOLLO 16 AS 16-5006 (2).jpgAS 16-5006 - Sketch of the details of King Crater (2)53 visitenessun commento
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APOLLO 16 AS 16-5006 (1).jpgAS 16-5006 - Details of King Crater (1)53 visiteHere is an enlarged vertical view of more flow lobes inside King Crater. Fine lineations radial to King are prominent in the ejecta blanket behind (South-East of) the lobate fronts. The term "deceleration lobe" has been applied because the lobes occur only where the ejecta slowed down and came to rest on slopes that face toward King. They resemble terrestrial rock avalanche deposits that came to rest after climbing a small slope. Some lobes overlap each other outward like shingles.
The sketch (2) shows what would probably be seen in a cutaway view. The arrow shows the direction of movement of the ejecta over the old landscape.
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APOLLO 16 AS 16-4531.jpgAS 16-4531 - Teophilus' "Peak"53 visiteA detailed view of part of the central peak complex of Theophilus. Central peaks are typical of most young, large impact craters on the Moon-and also of many manmade craters on Earth. From experimental data using controlled explosions, central peaks are known to consist of bedrock originally lying below the crater floor that, during the explosion, was uplifted, faulted, and folded by shock wave action. The irregular light-toned mountainous mass projecting above the floor of Theophilus is split into at least three enormous blocks separated by V-shaped structural valleys. Four or five circular craters without a prominent raised rim are located near or at the bases of the steep slopes. If these craters are endogenic vents rather than impact craters, their presence further suggests structural control along major fault planes. The planar walls of the northwest-trending valley contrast with other sloping surfaces of the central peak complex. They are steeper and, except for a few outcrops of protruding bedrock, are marked by linear grooves not unlike slickensides on many fault planes on Earth. Rock chutes do not seem to be a likely explanation for the grooves because there are no talus deposits or blocks at their lower ends. The debris cover is thin enough along the southern valley wall (top of picture) to show that the southern mountain block consists of layered rocks-at least five thick, light-toned layers alternate with thin, dark layers.
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53-st123954_smart-1_moon_H.jpgThe Lunar Limb, from 600 Km53 visitenessun commento
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0-APOLLO_08_Insignia.jpgThe Apollo 8 "Insignia"53 visite
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APOLLO_12_AS_12-55-8221.jpgAS 12-55-8221 - On the way to the Moon...53 visite...A proposito: anche il rullino 55 non c'รจ nella Collezione NASA dedicata all'Apollo 12 e pubblicata nell'Apollo Lunar Surface Journal, ma i frames in questione (anche se solo nelle loro versioni ultracompresse - e quindi qualitativamente scarse e - sovente - molto ingannevoli...) li potrete comunque trovare nell'Apollo Image Atlas custodito e gestito dal Lunar and Planetary Institute.
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APOLLO_12_AS_12-57-8448_HR.jpgAS 12-57-8448 (HR) - Soil surface disturbed by Astronauts' boots53 visitenessun commento
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APOLLO_12_AS_12-57-8451_HR.jpgAS 12-57-8541 - The texture of the Moon53 visitenessun commento
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APOLLO_14_AS_14-66-9292_(HR).jpgAS 14-66-9292 (HR) - Looking for the Blue Flare... (4)53 visitenessun commentoMareKromium
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