منابع مشابه
The origin of lunar crater rays
Lunar rays are filamentous, high-albedo deposits occurring radial or subradial to impact craters. The nature and origin of lunar rays have long been the subjects of major controversies. We have determined the origin of selected lunar ray segments utilizing Earth-based spectral and radar data as well as FeO, TiO2, and optical maturity maps produced from Clementine UVVIS images. These include ray...
متن کاملMeteor Storm Evidence against the Recent Formation of Lunar Crater
It has been suggested that the formation of 22 km diameter lunar crater Giordano Bruno was witnessed in June 1178 AD [1]. To date, this hypothesis has not been well tested. Such an impact on the Earth would be “civilization threatening.” Previous studies have shown that the formation of Giordano Bruno would lead to the arrival of 10 million tonnes of ejecta in the Earth’s atmosphere in the foll...
متن کاملLack of exposed ice inside lunar south pole Shackleton Crater.
The inside of Shackleton Crater at the lunar south pole is permanently shadowed; it has been inferred to hold water-ice deposits. The Terrain Camera (TC), a 10-meter-resolution stereo camera onboard the Selenological and Engineering Explorer (SELENE) spacecraft, succeeded in imaging the inside of the crater, which was faintly lit by sunlight scattered from the upper inner wall near the rim. The...
متن کاملLunar Meteorite Source Crater Size: Constraints from Impact Simulations
Hydrocode simulations of lunar impact events show that craters as small as 450 meters in diameter are viable candidates for the source of most lunar meteorites. The lunar cratering flux implies that 6 impact events of this size occurred on the moon in the last 0.1 Ma. This is in good agreement with the number of impacts (7) inferred from the geochemical analysis of the samples in hand. The resu...
متن کاملParallel Processing for Detection of Lunar Crater Morphometry-A Review
Craters appears on the lunar's surface in high density and the most interesting landform features of any planetary surface. Craters are important landform features on the lunar surface. Hence, detection and analyzing quantitative information (Morphometric) are key role of present day research. Morphometric measuring are useful for understating formation and evolution of surface features. It is ...
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ژورنال
عنوان ژورنال: Nature
سال: 1879
ISSN: 0028-0836,1476-4687
DOI: 10.1038/020121b0