Planetary cratering mechanics
Web17,012 O'KEEFE AND AHRENS: PLANETARY CRATERING MECHANICS TABLE 1. Scope of Parameters Studied for Impact of Silicate Projectile on a Planetary Half-Space Parameter Symbol Value Employed Unit Impact velocity Planetary gravity Density Bulk modulus U 12 g O, 1, 10 2, 4, 5, 106x Se r 2.7 E 7.6 x 1011 km/s ge (980 cm/s 2) g/cm 3 dyn/cm 2 WebSep 26, 2024 · Flynn Creek crater is a 3.8 km diameter, 360-million-year-old impact structure located in north central Tennessee, and is an invaluable terrestrial analog for the study of …
Planetary cratering mechanics
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WebAspects of cratering phenomenology are considered along with material properties and shock effects, theoretical cratering mechanics, ejecta, and problems of scaling. Attention … WebJun 23, 2024 · — The planets are arrayed east to south. Look for Mercury low in the east and then scan southeast to south, not in a straight line. Venus is the brightest of the planets, …
WebFeb 4, 2010 · Planetary Sciences Branch, Code SN2, NASA Johnson Space Center, Houston, Texas 77058, USA. ... A variety of such effects can be observed in the lunar cratering record, and some predictions can be made on the basis of calculations of impact melting and crater dimensions. Among them are the following: (1) as event magnitude increases, the volume ... WebSize-dependence in the shape of fresh impact craters on the moon The transition from small simple craters to large complex or modified craters is characterized by eleven changes in the shape of fresh lunar craters which occur within a diameter range of 10 to 30 km.
WebMar 1, 2024 · 15-3 Planetary Cratering Mechanics John D. O'Keefe and Thomas J. Ahrens* Lindhurst Laboratory of Experimental Geophysics Seismological Laboratory, California Institute of Technology Pasadena, CA 91125 ^PLANETARY CRATERING MECHANICS (California N92-18810 I Inst. of Tech.) 53 p CSCL 03B Unclas aa/9i 0071408 … WebMar 31, 1976 · Abstract The solution of many problems in lunar and terrestrial planetary structure is closely associated with progress in studies of the mechanics of meteorite impact cratering. This paper...
WebThe mechanics of impact cratering as a geologic process has long been a topic of interest (Holsapple, 1993; Melosh, ... On a given planetary body, the angle of impacts regarding the target normal follows a Gaussian distribution (Öpik, 1951), as 45° being the largest possibility and 0° and 90° being the least.
WebIn general, the planetary cratering process consists of five stages: contact and compression, excavation, modification, ejecta deposition, and degradation. What happens in each stage, such as shock wave propagation, was briefly explained. outside shelvesWebPlanetary science; Benjamin Kleeman Software Engineer; Carly KleinStern Graduate Student Research Focus: Atmosphere, Oceans, Ice, and Climate; Broc Kokesh Graduate Student … outside shoes australiaWebImpact cratering is a pervasive geologic process that continually modifies the martian surface. Meters to tens-of-meters scale craters have been observed to form during the … outside shopee guaranteeWebMar 11, 2024 · Nigmatulin, R.I. 1979 Spatial averaging in the mechanics of heterogeneous and dispersed systems. ... Fluid density effects in supersonic jet-induced cratering in a granular bed on a planetary body having an atmosphere in the continuum regime. Volume 915; Kaushik Balakrishnan (a1) and Josette Bellan (a1) (a2) outside shoe rackWebThe objective of this study was to obtain a quantitative understanding of the cratering process over a broad range of conditions. Our approach was to numerically compute the … rai raplay rita levi fictionWebTo obtain a quantitative understanding of the cratering process over a broad range of conditions, we have numerically computed the evolution of impact induced flow fields and … outside shooting ranges near meWebon planetary surfaces, including The Compact NASA Atlas of the Solar System and Planetary Mapping (both available from ... 3.4 Impact cratering 43 3.4.1 Impact cratering mechanics 43 3.4.2 Impact craters on Earth 44 3.4.3 Impact craters and planetary environments 50 3.5 Gradation 51 3.5.1 Weathering 51 outside shopee guarantee claims