Results 1 to 10 of about 123,664 (306)
Untrackable distal ejecta on planetary surfaces [PDF]
Nature Communications, 2023 Heterogeneous shock impedances of planetary materials cause abrupt changes of ejection angles, forming non-radial ejecta. Interpretations for provenances of surface deposits and ages derived from crater counts are affected by such untrackable ejecta.
Rui Xu +4 more
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Decoding planetary surfaces by counting cracks. [PDF]
Proc Natl Acad Sci U S APlanets are often covered with thin cracked shells. From mud films to lithospheres of rock or ice, fracture networks form two-dimensional (2D) tessellations of convex polygons whose geometry encodes their genesis. Here, we chart the geometry of 2D fracture mosaics across the solar system, and decode their formative conditions using a new dynamical ...
Silver S +3 more
europepmc +4 more sources
The Planetary Science Journal, 2023 We describe a model of the fluid mechanics and thermodynamics of turbulent lava flows capable of thermally eroding sinuous rille channels on bodies without atmospheres.
Lionel Wilson, James W. Head
doaj +1 more source
The Planetary Science Journal, 2023 The surfaces of airless planetary bodies, such as the Moon or Mercury, are covered with regoliths, which interact with the solar wind. The solar protons can either be absorbed by the surface or neutralized and reflected as hydrogen energetic neutral ...
S. Verkercke +6 more
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Main Results from the ISSI International Team “Characterization of 67P Cometary Activity”
Universe, 2023 The ESA/Rosetta mission accompanied the Jupiter Family Comet 67P/Churyumov-Gerasimenko and provided a huge amount of data which are providing important results about cometary activity mechanisms.
Andrea Longobardo +10 more
doaj +1 more source
Geomorphological processes on terrestrial planetary surfaces [PDF]
, 1980 This review deals with features and processes on planetary surfaces, first by examining the impact of photographic explorations of Moon, Mars, and Mercury on studies of surface processes on our own planet, and second by treating matters related to ...
Sharp, Robert P.
core +1 more source
Optical Constants of Martian Dust Analogs at UV–Visible–Near-infrared Wavelengths
The Astrophysical Journal Supplement Series, 2023 We present an advanced light-scattering model to retrieve the optical constants of three Martian dust analogs: Johnson Space Center regolith simulant, Enhanced Mojave Mars Simulant, and Mars Global Simulant.
Julia Martikainen +9 more
doaj +1 more source
Polarimetry of Water Ice Particles Providing Insights on Grain Size and Degree of Sintering on Icy Planetary Surfaces [PDF]
, 2018 The polarimetry of the light scattered by planetary surfaces is a powerful tool to provide constraints on their microstructure. To improve the interpretation of polarimetric data from icy surfaces, we have developed the POLarimeter for ICE Samples ...
Cerubini, Romain +4 more
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Electrostatic Repulsion of Dust from Planetary Surfaces
The Planetary Science Journal, 2023 Surfaces of planetary bodies can have strong electric fields, subjecting conductive grains to repulsive electrostatic forces. This has been proposed as a mechanism to eject grains from the ground.
F. Chioma Onyeagusi +3 more
doaj +1 more source
Life, 2019 At present, the study of diverse habitable environments of astrobiological interest has become a major challenge. Due to the obvious technical and economical limitations on in situ exploration, laboratory simulations are one of the most feasible research
Eva Mateo-Marti +5 more
doaj +1 more source