Results 51 to 60 of about 186,974 (222)
Meteoritics &Planetary Science, EarlyView.Abstract The Atacama Desert in Chile is characterized by its high meteorite density and old meteorite terrestrial ages. In this work, we present new terrestrial ages derived from measurements of the concentration of cosmogenic 36Cl in the metal fraction of 51 ordinary chondrites collected over a 6.8 km2 area located in the Catalina Dense Collection ...
Carine Sadaka +13 more
wiley +1 more source
Microbial Endolithic Community at Meteor Crater
Meteoritics &Planetary Science, EarlyView.Abstract Postimpact recovery and evolution in response to climate changes produced a modern ecosystem at Meteor Crater dominated by a grassland and woodland of piñon and juniper, which has been used to evaluate floral and megafaunal consequences of impact cratering during the Phanerozoic Eon of complex life.
David A. Kring, Charles S. Cockell
wiley +1 more source
Physical Review Physics Education Research, 2018 [This paper is part of the Focused Collection on Astronomy Education Research.] We examined teachers’ spatial-scientific reasoning and the alternative conceptions they held regarding Earth-space content. While participating in a professional development (
Jennifer Wilhelm +3 more
doaj +1 more source
Dust Outburst Dynamics and Hazard Assessment for Close Spacecraft–Comet Encounters
The Planetary Science Journal, 2021 Using the gas drag by sublimating cometary surface ices for the acceleration of dust particles and deceleration by the gravity field of the nucleus combined with basic laws of mechanics, the sizes, velocities, and number densities of escaping particles ...
Uwe Fink +6 more
doaj +1 more source
EPJ Web of Conferences, 2017 The proposal to use ground based radio telescopes for detection of Askaryan radio pulses from particle cascades arising when extremely high-energy (EHE > 1020 eV) cosmic rays (including neutrinos) interact with the lunar regolith of multi gigaton mass ...
Zheleznykh Igor +3 more
doaj +2 more sources
The Second Lunar Anomaly in Ancient Indian Astronomy [PDF]
Archive for History of Exact Sciences, 2006 All early Indian lunar models, from about A.D. 450 – 650, used only one anomaly – the variation in speed of the Moon as it circles the zodiac. Unlike the Hipparchan model, which treated the same anomaly in terms of a single epicycle or its equivalent eccentric deferent, the Indian lunar (and solar) models without exception used the concentric equant ...
openaire +1 more source
Solar Activity Dependence of the Dayside Lunar Surface Potential in the Terrestrial Magnetotail
Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.Abstract On the dayside of the Moon, the surface potential is primarily determined by (a) photoelectron emission by solar radiation and (b) the ambient plasma environment. Both of these drivers have large variability, but the resulting variability of the lunar surface potential has not been fully characterized yet.
Masahisa Kato +4 more
wiley +1 more source
Soil Science Society of America Journal, Volume 90, Issue 2, March/April 2026.Abstract Recent publications in soil science have reopened discussions over how soil and soil science should be defined, reflecting productive tension between historical constructs and the evolving frontiers of the discipline. While new definitions offered over the past decade provide valuable perspectives, they inevitably rely on past conventions and ...
Aaron Lee M. Daigh
wiley +1 more source
Effect of Boulder‐Size Distributions on Thermally Derived Rock Abundances on the Moon
Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.Abstract Rock abundance, defined as the surface's fractional area covered by rocks, is used to characterize the Moon's regolith, decipher its impact history, and assess potential landing sites. By definition, it should be agnostic to rock‐size distributions. However, it has been suggested that rock abundances, derived from surface temperatures measured
Brian Amaro +4 more
wiley +1 more source