Results 1 to 10 of about 82,273 (326)

Method for Identifying Lava Tubes Among Pit Craters Using Brightness Profile Across Pits on the Moon or Mars [PDF]

Journal of Astronomy and Space Sciences, 2016
Caves can serve as major outposts for future human exploration of the Moon and Mars. In addition, caves can protect people and electronic equipment from external hazards such as cosmic ray radiation and meteorites impacts and serve as a shelter ...
Jongil Jung, Ik-Seon Hong, Eunjin Cho, Yu Yi   +3 more
doaj   +2 more sources

The influence of helium-induced defects on the migration of strontium implanted into SiC above critical amorphization temperature

Frontiers in Materials, 2023
The presence of radiation-induced defects and the high temperature of implantation are breeding grounds for helium (He) to accumulate and form He-induced defects (bubbles, blisters, craters, and cavities) in silicon carbide (SiC).
T. F. Mokgadi, Z. A. Y. Abdalla, M. Madhuku, E. G. Njoroge, M. Mlambo, P. Mdluli, A. Sohatsky, V. A. Skuratov, V. A. Skuratov, V. A. Skuratov, J. B. Malherbe, T. T. Hlatshwayo   +11 more
doaj   +1 more source

Advective structures of the bottom of lake Natron and its surroundings (Tanzania)

Руды и металлы, 2022
In this study we consider the features of the development of weakly lithified bottom sediments and the general structure of lake Natron against the background of its seasonal drying and watering.
Alexander N. Baryshev
doaj   +1 more source

What Is a Polygonal Impact Crater? A Proposed Framework Toward Quantifying Crater Shapes

Earth and Space Science, 2023
Impact craters are used for a wide array of investigations of planetary surfaces. A crater form that is somewhat rare, forming only ∼10% of impact craters, is the polygonal impact crater (or PIC).
Stuart J. Robbins, Jamie D. Riggs
doaj   +1 more source

Shaping of the Present-Day Deep Biosphere at Chicxulub by the Impact Catastrophe That Ended the Cretaceous

Frontiers in Microbiology, 2021
We report on the effect of the end-Cretaceous impact event on the present-day deep microbial biosphere at the impact site. IODP-ICDP Expedition 364 drilled into the peak ring of the Chicxulub crater, México, allowing us to investigate the microbial ...
Charles S. Cockell, Bettina Schaefer, Cornelia Wuchter, Marco J. L. Coolen, Kliti Grice, Luzie Schnieders, Joanna V. Morgan, Sean P. S. Gulick, Sean P. S. Gulick, Sean P. S. Gulick, Axel Wittmann, Johanna Lofi, Gail L. Christeson, David A. Kring, Michael T. Whalen, Timothy J. Bralower, Gordon R. Osinski, Philippe Claeys, Pim Kaskes, Sietze J. de Graaff, Thomas Déhais, Steven Goderis, Natali Hernandez Becerra, Sophie Nixon, IODP-ICDP Expedition 364 Scientists   +24 more
doaj   +1 more source

Survival of Ancient Lunar Water Affected by Topographic Degradation of Old, Large Complex Craters

Geophysical Research Letters, 2022
Lunar water is redistributed by various processes. Topographic diffusion affects the transport of water and contributes to its preservation in subsurface layers.
C. L. Talkington, M. Hirabayashi, P. E. Montalvo, A. N. Deutsch, C. I. Fassett, M. A. Siegler, S. L. Shepherd, D. T. King Jr.   +7 more
doaj   +1 more source

New Lunar Crater Production Function Based on High-Resolution Images

Remote Sensing, 2023
The lunar crater production function describes the general pattern of the size–frequency distribution of craters on the lunar surface, and it is the foundation of the surface dating method via crater counting.
Jianan Liu, Zongyu Yue, Kaichang Di, Sheng Gou, Yangting Lin   +4 more
doaj   +1 more source

First Digits’ Shannon Entropy

Entropy, 2022
Related to the letters of an alphabet, entropy means the average number of binary digits required for the transmission of one character. Checking tables of statistical data, one finds that, in the first position of the numbers, the digits 1 to 9 occur ...
Welf Alfred Kreiner
doaj   +1 more source

Depth to Diameter Analysis on Small Simple Craters at the Lunar South Pole—Possible Implications for Ice Harboring

Remote Sensing, 2022
In this paper, we present a study comparing the depth to diameter (d/D) ratio of small simple craters (200–1000 m) of an area between −88.5° to −90° latitude at the lunar south pole containing Permanent Shadowed Regions (PSRs) versus craters without PSRs.
Ramiro Marco Figuera, Christian Riedel, Angelo Pio Rossi, Vikram Unnithan   +3 more
doaj   +1 more source

Comparison of Automated Crater Catalogs for Mars From Benedix et al. (2020) and Lee and Hogan (2021)

Earth and Space Science, 2023
Crater mapping using neural networks and other automated methods has increased recently with automated Crater Detection Algorithms (CDAs) applied to planetary bodies throughout the solar system. A recent publication by Benedix et al.
C. Lee
doaj   +1 more source