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APOLLO 15 AS 15-0757.jpgAS 15-0757 - Tsiolkovsky63 visiteTsiolkovsky is one of the most prominent features on the Far-Side of the Moon. It is a 1 90-Km- wide impact crater with a large, complex central peak that is offset from the apparent center of the crater. Differences in tone and texture between the central peak, the lava-flooded floor, the terraced walls and the ejecta blanket are dramatically displayed in this oblique view. The ejecta blanket is dominated by a coarse pattern of ridges radiating outward from the crater; superposed on this pattern are many small level pools of smooth material that are much lighter than the otherwise similar smooth dark mare in the floor of Tsiolkovsky. The pools probably originated differently. They may consist of rock that was melted by the heat and pressure generated during the impact event and that flowed into depressions before it hardened.
Cratering experiments on Earth have shown that central peaks consist of bedrock that has been displaced upward by a distance equal to about 1/10th the diameter of the resulting crater. If samples could be obtained from the central peak at Tsiolkovsky, they might be rocks that were 20 km below the Moon's surface before Tsiolkovsky was created.
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APOLLO 15 AS 15-1030.jpgAS 15-1030 - Tsiolkovsky60 visiteThis vertical view shows the central part of Tsiolkovsky in more detail. From the nature of the boundary between the dark mare lavas and the lighter materials at the base of the walls and in the central peak, we know that the lavas must have lapped upon and embayed the lighter materials. The relatively level areas of lighter material in the southwest and northwest parts of the floor have a distinctly different texture than the coarse blocky materials of slumped wall that surround the floor elsewhere. Finely cracked, furrowed, and hummocky, they closely resemble parts of the floor of the crater King. They probably consist of impact melt that solidified to form the original floor of Tsiolkovsky before it was flooded by mare lavas.
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APOLLO 15 AS 15-91-12383 HR-1.jpgAS 15-91-12383 - Tsiolkovsky Crater (HR)120 visitenessun commento
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APOLLO 15 AS 15-91-12383.jpgAS 15-91-12383 - Tsiolkovsky Crater55 visitenessun commento
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APOLLO 15 AS 15-9591.jpgAS 15-9591 - Tsiolkovsky53 visiteModerate enlargement of part of a panoramic camera frame provides greater detail of the central peak complex of Tsiolkovsky. A relatively large population of superposed craters has been preserved on level areas of the peaks (near the left-center of the photograph). In contrast, very few craters are present on steep slopes-most have been destroyed by the downslope movement of erosional debris. An intermediate population of craters on the dark mare shows that the mare surface is younger than the level areas of the peak complex but older than the freshly exposed steep slopes of the peaks. The youngest part of the mare surface is the dark, smooth area adjacent to the small angular rifle in the upper left corner. Here small craters have been almost completely filled by the flow and are barely discernible. The rifle may have served as the vent for the young lavas.
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APOLLO 15 AS 15-9596.jpgAS 15-9596 - Tsiolkovsky53 visiteDrastic enlargement of a panoramic camera frame provides a wealth of detail within the small area outlined in AS 15-9591. Note the many large blocks on the slope. The largest block is about 125 mt wide. Most blocks apparently originated at the discontinuous ledge near the top of the slope. Note also the fillets on the upslope side of many of the blocks. They probably consist of fine-grained debris that was trapped behind the blocks as it moved downslope. The arrows identify what appear to be two craters in the process of being destroyed by erosion. Otherwise, craters are absent on the steeply dipping slope, although numerous craters are present on the gentler slopes above.
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APOLLO 15-M-0757.jpgAPOLLO 15 AS 15-M-0757 - Flying over Tsiolkovsky Crater (HR)72 visitenessun commento
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APOLLO 17 AS 17-M-0446-1.jpgAS 17-m-0446 - metric frames (1)55 visite
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APOLLO 17 AS 17-M-0446-2.jpgAS 17-m-0446 - metric frames (2)53 visite
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APOLLO 17 AS 17-M-0447-1.jpgAS 17-m-0447 - metric frames (1)53 visite
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APOLLO 17 AS 17-M-0447-2.jpgAS 17-m-0447 - metric frames (2)53 visite
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APOLLO_08_AS_08-10074968.jpgAS 08 - 10074968 (NASA Archives' Serial) - Tsiolkovsky's Peak55 visite
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