Results 141 to 150 of about 7,916,508 (186)

Formation of Simple Impact Craters in Layered Targets: Implications for Lunar Crater Morphology and Regolith Thickness [PDF]

open access: yesJournal of Geophysical Research E: Planets, 2018
AbstractImpact crater morphologies vary significantly across the lunar maria. Craters with diameter less than 400 m are closely related to variations in target properties (rock strength, porosity, and layering) as well as the impact velocity. Here we investigate target and impact conditions feasible for reproducing crater morphologies, such as normal ...
Kai Wünnemann   +2 more
exaly   +4 more sources

Research Progress of Lunar Impact Crater Detection

2020 International Conference on Computer Science and Management Technology (ICCSMT), 2020
Impact craters are the most prominent topographic feature on the lunar surface, which will play a very important role in the construction of lunar bases and lunar surface activities in the future. Due to the large number of meteorite craters, different diameters and shapes, and the superposition of their morphologies, the artificial identification of ...
Yutong Jia   +3 more
openaire   +1 more source

Magnetic signatures of lunar impact craters

open access: yesIcarus
The hypothesis that the lunar core dynamo once generated a global magnetic field is widely accepted [1–2]. Paleomagnetic analysis of lunar samples shows that the lunar dynamo field operated from about 4.2 Ga to sometime between 1.92 and 0.8 Ga [3–5].
Mark Wieczorek
exaly   +4 more sources

Impact melt in small lunar highland craters [PDF]

open access: yesJournal of Geophysical Research E: Planets, 2012
Impact melt deposits have been identified in small, simple impact craters within the lunar highlands. Such deposits are rare, but have been observed in craters as small as 170 m diameter. The melt occurs as well‐defined pools on the crater floor, as well as veneers on the inner crater wall and stringers of material extending over the rim and away from ...
J. B. Plescia, M. J. Cintala
exaly   +2 more sources

A study of lunar impact crater size-distributions

The Moon, 1975
Discrepancies in published crater frequency data prompted this study of lunar crater distributions. Effects modifying production size distributions of impact craters such as surface lava flows, blanketing by ejecta, superposition, infilling, and abrasion of craters, mass wasting, and the contribution of secondary and volcanic craters are discussed. The
Gerhard Neukum, Jafar Arkani-Hamed
exaly   +2 more sources

The Impact Theory of the Origin of Lunar Craters

Publications of the Astronomical Society of the Pacific, 1956
Abstract : The purpose of this paper is to present the results of computations on the pressures and temperatures attained in the impact of large meteorites on the lunar surface, based on the equation of state as obtained from the ThomasFermi statistical model of the atom.
J. J. Gilvarry, J. E. Hill
openaire   +1 more source

Study on the volume of landslides in lunar impact craters

Advances in Engineering Technology Research, 2023
The lunar exploration project is of great significance, among which the statistics and measurement of lunar landslide are an important part of lunar exploration. With the help of Google Earth software, lunar image data were obtained, and the volume calculation and analysis of landslides in 14 meteorite impact craters on the Moon were performed using ...
openaire   +1 more source

Pseudo‐volcanism and lunar impact craters

Eos, Transactions American Geophysical Union, 1968
One of the ‘freshest’ heavily rayed craters on the Moon is the large nearly circular Copernicus. Copernicus is generally considered to be of impact origin [Shoemaker, 1962; Schmidt et al., 1967], and many of the small craters associated with it, including some of those arranged in chains, are ascribed to impacts of secondary fragments.
openaire   +1 more source

The Lunar Record of Recent Impact Cratering

2001
The history of the accretion of extraterrestrial material onto the Earth covers the entire lifetime of the planet, from the accretion of great quantities of mass at the time the planet formed ∼4.5 Ga, to the much less dramatic infall of stones and dust to the Earth today. Impact craters are the scars left behind when some of the larger portions of this
Jennifer A. Grier, Alfred S. McEwen
openaire   +1 more source

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