| Risultati della ricerca nelle immagini - "Bessel" |
APOLLO 15 AS 15-9328.jpgAS 15-9328 - Bessel Crater55 visiteOutcrops of layered rock are strikingly evident in the upper part of the far wall of the crater Bessel (17- Km diameter) in South-Central Mare Serenitatis. The outcrop is most evident where it forms shadows; however, the dark debris that streams downslope from the layered rock is visible even on parts of the crater wall where the Sun has washed out all details of relief. The outcrop is at a uniform distance below the crater rim, indicating that the strata are horizontal. Thus, Bessel furnishes convincing evidence that mare surfaces are underlain by dark layered rock. The dark rock is now known to be basalt that accumulated as successive flows or layers of lava.
Bessel is youthful enough that boulders are abundant on its rim and floor.
An anomalously high number of boulders is visible in and around the 750-m diameter crater (arrow) on the floor.
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LRO-2500-Bessel_Crater.jpgBessel (possible Natural Colors on a Radar Image; credits: Dr Paolo C. Fienga - Lunexit Team)86 visiteMini-RF S-band Zoom Synthetic Aperture Radar (SAR) image strip through central Mare Serenitatis on the Near-Side of the Moon (approx. Long. of the strip ~ 18° East; center Lat. ~ 20° North).
The radar strip runs through the crater Bessel (inset; approx. 15 km (or about 9 mile) diameter; center at 21,8° North Lat. and 17,9° East Long.) and covers the highlands of the Haemus Mountains (on the Rim of the Serenitatis Basin) in its Southern (bottom) third.
The full-resolution SAR data are 30 mt (90 feet). The Streaks of bright and dark material in the Walls of Bessel probably reflect the blockiness of Landslides within the Crater, brighter Streaks having more blocks of the 10-cm (4") scale.
The radar strip covers a major geological boundary in Mare Serenitatis; the darker, lower Maria has higher Titanium content than central Serenitatis. We see this geological boundary in the Mini-RF radar image, caused by higher absorption of RF energy by the high content of the Iron-Titanium Oxide mineral "Ilmenite".
Thus, Mini-RF SAR images can be used to map the Titanium content of the Lunar Maria. The background image is part of the Clementine global mosaic.MareKromium
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as17-145-22273.JPGAS 17-145-22273 - Docking Time!54 visiteCaption NASA originale:"CSM - orbit 52. The Command Module docking probe photographed from the Lunar Module during docking. The LM is the active vehicle during this maneuver. Craters visible on the Lunar Surface are Bessel and Deseilligny.
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