Results 1 to 10 of about 164,975 (347)

Lunar impact crater identification and age estimation with Chang'E data by deep and transfer learning. [PDF]

Nat Commun, 2020
Impact craters, as "lunar fossils", are the most dominant lunar surface features and occupy most of the Moon's surface. Their formation and evolution record the history of the Solar System. Sixty years of triumphs in the lunar exploration projects accumulated a large amount of lunar data. Currently, there are 9137 existing recognized craters.
Yang C, Zhao H, Bruzzone L, Benediktsson JA, Liang Y, Liu B, Zeng X, Guan R, Li C, Ouyang Z.   +9 more
europepmc   +2 more sources

Dynamics of shallow impact cratering [PDF]

Physical Review E, 2005
We present data for the time-dependence of wooden spheres penetrating into a loose non-cohesive packing of glass beads. The stopping time is a factor of three longer than the time $d/v_\circ$ needed to travel the total penetration distance $d$ at the impact speed $v_\circ$. The acceleration decreases monotonically throughout the impact.
Randall D. Kamien, Douglas J. Durian, Douglas J. Durian, M. A Ambroso   +3 more
openaire   +6 more sources

YOLOv8-LCNET: An Improved YOLOv8 Automatic Crater Detection Algorithm and Application in the Chang’e-6 Landing Area [PDF]

Sensors
The Chang’e-6 (CE-6) landing area on the far side of the Moon is located in the southern part of the Apollo basin within the South Pole–Aitken (SPA) basin.
Jing Nan, Yexin Wang, Kaichang Di, Bin Xie, Chenxu Zhao, Biao Wang, Shujuan Sun, Xiangjin Deng, Hong Zhang, Ruiqing Sheng   +9 more
doaj   +2 more sources

Impact cratering on Earth

, 2001
Approximately 160 known terrestrial impact structures are distributed worldwide, with concentrations in geologically stable areas. The basic types are simple' craters, up to 4 km in diameter, with uplifted and overturned rimrocks surrounding a bowl-shaped depression, and complex' structures, generally over 3 km in diameter, with a central uplifted ...
R. A. F. Grieve
openaire   +2 more sources

Hydrothermal activity generated by impact melt emplacement on the rim of Ritchey crater, Mars [PDF]

Nature Communications
Impact-induced hydrothermal systems have the potential to sustain long-lived aqueous environments throughout the history of Mars, yet their nature and distribution are not well-understood.
Lingqi Zeng, Briony H. N. Horgan
doaj   +2 more sources

Experimental study on mesoscopic damage and fragmentation characteristics of hard rock under repeated particle impacts

Rock and Soil Mechanics, 2022
Particle impact, a new drilling technology, has been applied in drilling and gas and oil exploitation. Also, it is considerably promising as an assisting rock-breaking method for the excavation of tunnels in extremely hard rocks.
JU Ming-he, TAO Ze-jun, LI Xiao-feng, YU Li-yuan, JIANG Li-jie, LI Xiao-zhao   +5 more
doaj   +1 more source

Polygonal impact craters on Ganymede

Meteoritics & Planetary Science, 2023
AbstractPolygonal impact craters (PICs) are unique geological features observed on various planetary bodies and constitute a small percentage of the impact crater population. This study focuses on PICs on Ganymede, where no such craters have been investigated so far. Here we present the distribution of PICs, examine their morphological characteristics,
Namitha Rose Baby, Thomas Kenkmann, Katrin Stephan, Roland Wagner   +3 more
openaire   +6 more sources

The Morphometry of Impact Craters on Bennu [PDF]

Geophysical Research Letters, 2020
AbstractBennu is an ~500‐m‐diameter rubble‐pile asteroid that is the target of detailed study by the Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS‐REx) mission. Here we use data from the OSIRIS‐REx Laser Altimeter to assess depth‐to‐diameter ratios (d/D) of 108 impact craters larger than 10 m in ...
James H. Roberts, Kevin J. Walsh, Michael C. Nolan, P. Michel, R. T. Daly, J. R. Weirich, Eric Palmer, H. Nair, J. A. Seabrook, Michael Daly, Carolyn M. Ernst, Mark E. Perry, Catherine L. Johnson, Catherine L. Johnson, E. B. Bierhaus, Erica Jawin, R. C. Espiritu, Dante S. Lauretta, Hannah C.M. Susorney, Olivier S. Barnouin, David Trang, Robert Gaskell   +21 more
openaire   +4 more sources

Microbial Life in Impact Craters [PDF]

Current Issues in Molecular Biology, 2020
Asteroid and comet impacts are known to have caused profound disruption to multicellular life, yet their influence on habitats for microorganisms, which comprise the majority of Earth's biomass, is less well understood. Of particular interest are geological changes in the target lithology at and near the point of impact that can persist for billions of
Cockell, Charles S., Osinski, Gordon, Sapers, Haley, Pontefract, Alexandra, Parnell, John   +4 more
openaire   +3 more sources

Impact crater degradation, Oxia Planum, Mars

Journal of Maps, 2021
The main goal of the European Space Agency (ESA) and Roscosmos ExoMars rover mission is to collect samples from the near-subsurface of Mars. The rover will look for any physical or chemical evidence of ancient life in the near subsurface.
Amelie L. Roberts, Peter Fawdon, Melissa Mirino   +2 more
doaj   +1 more source