| Piú viste - The Clementine Files |
081-The Moon from Clem-SouthPole.jpg112 - Polar Areas: View of the South Pole57 visiteMosaic of about 650 Clementine images of the South Pole of the Moon, from 80° South Lat. to the Pole (center). The Near-Side of the Moon is the top half of the image; the bottom half is the Far-Side. The dark region near the Pole indicates an old depression, inside the rim crest of the South Pole-Aitken Basin. Large parts of this area (about 15.000 Km2) are permanently shadowed and bistatic radar results from Clementine indicate that they could contain deposits of water ice.
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Eartshine.JPG024 - Earthshine57 visiteThe Clementine Startracker acquired this image of the Moon glowing from the reflected light of the Earth.
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Earth.JPG300 - The Earth from Clementine57 visiteThis was imaged by the High Resolution Camera at 750 nm on 11 April 1994 during lunar orbit 242. This mosaic was put together from over 70 HR images as the Clementine spacecraft's attitude was adjusted to scan the sensor across the Earth in strips.
The image shows a 2° by 2° field of view and has a resolution of 6 Km from a distance of about 380.000 Km.
Africa and the Middle East are clearly visible on the right, with South and Central America visible on the left.
The Caribbean, Florida and the the Eastern US (mostly under cloud cover) are visible near the top of the image. North is to the upper right.
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Tsiolkovskij-UVVis.jpg130 - Tsiolkovskij Crater57 visitenessun commento
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ZZ-Farside-Clem.jpg008 - Far-Side Map57 visitenessun commento
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ZZ-Nearside-Clem.jpg009 - Near-Side Map57 visitenessun commento
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ChantCrater-UVVIS.jpg170 - Chant Crater57 visitenessun commento
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Tycho-UVVis-2.gif203 - Tycho Crater57 visitenessun commento
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021-The Moon from Clem-Aristachus-PIA00090.jpg042 - Aristarchus Crater (false colors)56 visiteThe Aristarchus region is one of the most diverse and interesting areas on the Moon. About 500 Clementine images acquired through three spectral filters (415, 750, and 1000 nm) were processed and combined into a multispectral mosaic of this region. Shown here is a color-ratio composite, in which the 750/415 ratio controls the red-channel brightness, it inverse (415/750) controls the blue, and the 750/1000 ratio controls the green. Color ratios serve to cancel out the dominant brightness variations and topographic shading, thus isolating the color differences related to composition or mineralogy. The Aristarchus plateau is a rectangular, elevated crustal block about 200 km across, surrounded by the vast mare lava plains of Oceanus Procellarum. Clementine altimetry shows that the plateau is a tilted slab sloping down to the northwest, that rises more than 2 km above Oceanus Procellarum on its southeastern margin. The plateau was probably uplifted, tilted, and fractured by the Imbrium basin impact, which also deposited hummocky ejecta on the plateau surface. The plateau has experienced intense volcanic activity, both effusive and explosive. It includes the densest concentration of lunar sinuous rilles, including the largest known, Vallis Schroteri, which is about 160 km long, up to 11 km wide, and 1 km deep. The rilles in this area begin at 'cobra-head' craters, which are the apparent vents for low-viscosity lavas that formed vents for 'dark mantling' deposit covering the plateau and nearby areas to the north and east. This dark mantling deposit probably consists primarily of iron-rich glass spheres (pyroclastics or cinders), and has a deep red color on this image. Rather than forming cinder cones as on Earth, the lower gravity and vacuum of the Moon allows the pyroclastics to travel much greater heights and distances, thus depositing an extensive regional blanket. The Aristarchus impact occurred relatively recently in geologic time, after the Copernicus impact but before the Tycho impact. The 42 km diameter crater and its ejecta are especially interesting because of its location on the uplifted southeastern corner of the Aristarchus plateau. As a result, the crater ejecta reveal two different stratigraphic sequences: that of the plateau to the northwest, and that of the portion of Oceanus Procellarum to the southwest. This asymmetry is apparent in the colors of the ejecta as seen in this image, which is reddish to the southeast, dominated by excavated mare lava, and bluish to the northwest, caused by the excavation of highland materials in the plateau. The extent of the continuous ejecta blanket also appears asymmetric: it extends about twice as far to the north and east than in other directions, approximately following the plateau margins. These ejecta lobes could be caused by an oblique impact from the southeast, or it may reflect the presence of the plateau during ejecta emplacement. Two dark blue spots in the center of Aristarchus represent tan especially interesting discovery. The infrared spectral properties measured by Clementine are consistent with a composition of almost pure anorthosite, the primitive rock type produced by the lunar magma ocean. This is the first discovery of a major exposure of anorthosite in this region of the Moon, well within the boundary of the hypothetical Procellarum basin. Don Wilhelms (Geologic History of the Moon, USGS Professional Paper, 1984) proposed that the giant Procellarum basin entirely removed the upper anorthositic crust from the north-central nearside of the Moon.
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029-The Moon from Clem-OrientaleBasin.jpg070 - The "Orientale" basin56 visiteMosaic of more than 2000 Clementine (750-nanometers) images, showing the Orientale Basin of the Moon at full resolution of about 250 mt per pixel. The Orientale Basin is about 930 Km in diameter and is only partly filled by dark, mare lava.
The relative paucity of mare basalt fill, coupled with the young age and topographic freshness of the basin, makes this feature the archetypal lunar multiring basin.
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043-The Moon from Clem-North Pole-2.jpg035 - Plaskett Crater (natural colors)56 visitePlaskett Crater ID:
Location: 82° North Lat. and 174° East Long.;
Dimension: about 110 Km in diameter
Interesting Features: the huge "central peak"
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040-The Moon from Clem-KeplerCrater-1.jpg151 - Kepler Crater56 visitenessun commento
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