scholarly journals Identification of Multiscale Spatial Structure of Lunar Impact Crater: A Semivariogram Approach

Author(s):  
Jiao Wang ◽  
Dongping Ming ◽  
Weiming Cheng
2021 ◽  
Author(s):  
Daniel Sheward ◽  
Anthony Cook ◽  
Chrysa Avdellidou ◽  
Marco Delbo ◽  
Bruno Cantarella ◽  
...  

The form of the lunar impact crater size-frequency distribution is discussed. Latest results on the lunar cratering chronology in the first 1.5 Ga after its formation are reviewed. It is shown that most cratering arguments speak against an extraordinary high flux increase (‘cataclysm’) at ca . 4 Ga ago. From age determination by crater frequency measurements, it is concluded that the dominant process of the formation of light (Cayley) plains is not deposition of basin ejecta but an endogenic one.


The Moon ◽  
1975 ◽  
Vol 12 (2) ◽  
pp. 201-229 ◽  
Author(s):  
Gerhard Neukum ◽  
Beate K�nig ◽  
Jafar Arkani-Hamed

Nature ◽  
1974 ◽  
Vol 252 (5484) ◽  
pp. 556-558 ◽  
Author(s):  
G. HULME
Keyword(s):  

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Chen Yang ◽  
Haishi Zhao ◽  
Lorenzo Bruzzone ◽  
Jon Atli Benediktsson ◽  
Yanchun Liang ◽  
...  

AbstractImpact craters, which can be considered the lunar equivalent of fossils, are the most dominant lunar surface features and record the history of the Solar System. We address the problem of automatic crater detection and age estimation. From initially small numbers of recognized craters and dated craters, i.e., 7895 and 1411, respectively, we progressively identify new craters and estimate their ages with Chang’E data and stratigraphic information by transfer learning using deep neural networks. This results in the identification of 109,956 new craters, which is more than a dozen times greater than the initial number of recognized craters. The formation systems of 18,996 newly detected craters larger than 8 km are estimated. Here, a new lunar crater database for the mid- and low-latitude regions of the Moon is derived and distributed to the planetary community together with the related data analysis.


2012 ◽  
Vol 117 (E12) ◽  
pp. n/a-n/a ◽  
Author(s):  
C. I. Fassett ◽  
J. W. Head ◽  
S. J. Kadish ◽  
E. Mazarico ◽  
G. A. Neumann ◽  
...  

1967 ◽  
Vol 31 ◽  
pp. 45-46
Author(s):  
Carl Heiles

High-resolution 21-cm line observations in a region aroundlII= 120°,b11= +15°, have revealed four types of structure in the interstellar hydrogen: a smooth background, large sheets of density 2 atoms cm-3, clouds occurring mostly in groups, and ‘Cloudlets’ of a few solar masses and a few parsecs in size; the velocity dispersion in the Cloudlets is only 1 km/sec. Strong temperature variations in the gas are in evidence.


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