| Risultati della ricerca nelle immagini - "Linea" |
Dione-PIA07638.jpgDione: Carthage Linea61 visiteDione's icy surface is scarred by craters and sliced up by multiple generations of geologically-young bright fractures. Numerous fine, roughly-parallel linear grooves run across the terrain in the upper left corner. Most of the craters seen here have bright walls and dark deposits of material on their floors. As on other Saturnian moons, rockslides on Dione may reveal cleaner ice, while the darker materials accumulate in areas of lower topography and lower slope (e.g. crater floors and the bases of scarps).
The terrain seen here is centered at 15,4° North Latitude, 330,3° West Longitude, in a Region called Carthage Linea. North on Dione is up and rotated 50° to the left.
The image was taken in visible green light with the Cassini narrow-angle camera on Oct. 11, 2005, at a distance of approx. 19.600 Km (roughly 12.200 miles) from Dione. The image scale is about 230 mt (760 feet) per pixel".
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Dione-PIA07748.jpgThe surface of Dione from about 4486 Km65 visiteThe terrain in this image is located within a 60-Km-wide impact crater along the feature called Padua Linea. The western rim of the encompassing crater runs from the middle left to the upper right. The crater's central peak can be seen at the lower right. Multiple generations of fractures are visible here. Numerous fine, roughly parallel linear grooves run across the terrain from top to bottom and are interrupted by the larger, irregular bright fractures. In several places, fractures postdate some deposits in the bottoms of craters that are not badly degraded by time. Such a fracture, for example, runs from the center toward the upper right. Most of the craters seen here have bright walls and dark deposits of material on their floors. As on other Saturnian moons, rockslides on Dione may reveal cleaner ice, while the darker materials accumulate in areas of lower topography and lower slope (e.g. crater floors and the bases of scarps). This view is centered on terrain near 11° South lat. and 238° West long.
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ESP_022195_1335_RED_abrowse-Slope_Linea-PCF-LXTT-2.jpgTransient "Slope Linea Formation" in a well-preserved Unnameed Southern Crater (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)216 visiteAcquisition date: 21 April 2011
Mars Local Time (M.L.T.): 14:48 (Early Afternoon)
Latitude (centered): 45,9° North
Longitude (East): 9,5°
Range to Target Site (Spacecraft Altitude): 250,9 Km (156,8 miles)
Original Image Scale Range: 25,1 cm/pixel (with 1 x 1 binning) so objects ~75 cm across are resolved
Map Projected Scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 2,0°
Sun-Crater-Spacecraft Angle (Phase Angle): 37,9°
Solar Incidence Angle (S.AI.A.): 40° (with the Sun about 50° above the Local Horizon)
Solar Longitude: 278,5° (Northern Winter)
MareKromium
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Linear_Ridges-PCF-LXTT-1.jpgLinear Ridges (Enhanced Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)58 visitenessun commentoMareKromium
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PSP_008598_2155_RED_abrowse~0.jpgLineated Valley Fill in Coloe Fossae (MULTISPECTRUM; credits: Lunexit)68 visiteThis Region consists of several relatively straight and narrow canyons located near the boundary between the high-standing, heavily cratered areas of the Southern Hemisphere and the low, uncratered plains that cover most of the Northern Hemisphere of Mars.
Transitional areas such as this are known as the “Fretted Terrain” and are characterized by a complicated mix of cliffs, mesas, buttes, and canyons.
This image reveals a canyon with relatively steep and smooth walls. The floor of the canyon displays a complex set of ridges and grooves that are generally parallel to the canyon walls.
The material comprising the canyon floor is common observed in Fretted Terrain and is called "Lineated Valley Fill" (LVF).
The cause of the LVF texture is not well understood but may result from patterns of ice rich soils or ice loss. The linear alignment may be caused by the downhill movement of ice-rich soil, or glacial flow in dirty ice or ice-rich soil.MareKromium
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