Results 41 to 50 of about 1,238 (178)

Silicate–sulfide interaction within quenched melts of space weathered Ryugu grains

Meteoritics &Planetary Science, EarlyView.
Abstract The first few microns of the surface of airless bodies are subject to severe changes due to the harsh environment of space, known as space weathering. The Hayabusa2 sample return mission from the asteroid Ryugu provides the first opportunity to study these effects on a carbonaceous and hydrated body.
Sylvain Laforet, Hugues Leroux, Corentin Le Guillou, Maya Marinova, Adrien Néri, Adrien Teurtrie, Francisco de la Peña, Damien Jacob, Alexandre Fadel, David Troadec   +9 more
wiley   +1 more source

Selective sampling of asteroids, the Moon, and Mars: Factors affecting the numerical abundances of members of meteorite groups

Meteoritics &Planetary Science, EarlyView.
Abstract Meteorite collection inventories show that many related meteorite groups have very different numerical abundances (e.g., lunar versus Martian meteorites; Eagle Station pallasites versus main‐group pallasites; eucrites versus diogenites; ungrouped Antarctic irons versus ungrouped non‐Antarctic irons; carbonaceous chondrite‐related (CC) iron ...
Alan E. Rubin
wiley   +1 more source

Experimental simulations of space weathering on pentlandite

Meteoritics &Planetary Science, EarlyView.
Abstract Pentlandite (Fe, Ni)9S8 is an important accessory mineral on asteroidal surfaces. It has been identified in returned regolith samples from asteroids Itokawa, Ryugu, and Bennu. Currently, systematic studies to understand the response of this mineral phase under space weathering conditions are lacking.
L. C. Chaves, M. S. Thompson, C. A. Dukes, M. J. Loeffler, M. F. Martinez‐Motta, H. Vannier, B. H. N. Horgan, N. Smith, K. Ardrey   +8 more
wiley   +1 more source

Pairing relationships of howardites, eucrites and diogenites (HED) from the Miller Range ice fields, Antarctica

Meteoritics &Planetary Science, EarlyView.
Abstract We reevaluated pairing relationships among 56 Antarctic howardites, eucrites, and diogenites (HED) from the Miller Range ice fields (MIL) based on new measurements of cosmogenic radionuclides and bulk composition of 28 HED samples and one HED‐related dunite.
Kees C. Welten, Marc W. Caffee, Kevin Righter, Ralph P. Harvey, John Schutt, James M. Karner   +5 more
wiley   +1 more source

Metallic messengers from the cosmos: Rare (Al,Cu)‐bearing meteorites from the Project Stardust collection

Meteoritics &Planetary Science, EarlyView.
Abstract We report the discovery of (Al,Cu)‐bearing metallic alloys in two micrometeorites found in the Project Stardust collection gathered from urban rooftop environments in Norway. Most of the alloys are the same as those found in the Khatyrka meteorite and other micrometeorites, though one has a composition that has not been reported previously ...
Luca Bindi, Jon Larsen, Jan B. Kihle, Guangming Cheng, Jinping Hu, Nan Yao, Chi Ma, Yunbin Guan, Paul D. Asimow, Paul J. Steinhardt   +9 more
wiley   +1 more source

Systematic Characterization of and Search for Activity in Potentially Active Asteroids

The Planetary Science Journal, 2020
Abstract We report on our long-term observational campaign to characterize and monitor a select sample of 75 dynamically selected dormant comet candidates and six near-Sun asteroids. Both asteroid subpopulations can be considered likely to display comet-like activity.
Michael Mommert, David E. Trilling, Joseph L. Hora, Cassandra Lejoly, Annika Gustafsson, Matthew Knight, Nick Moskovitz, Howard A. Smith   +7 more
openaire   +2 more sources

Expected value, to a point: Moral decision‐making under background uncertainty

Noûs, EarlyView.
Abstract Expected value maximization gives plausible guidance for moral decision‐making under uncertainty in many situations. But it has unappetizing implications in ‘Pascalian’ situations involving tiny probabilities of extreme outcomes. This paper shows, first, that under realistic levels of ‘background uncertainty’ about sources of value independent
Christian Tarsney
wiley   +1 more source

Rational Slack and Doxastic Grain

Pacific Philosophical Quarterly, EarlyView.
ABSTRACT This paper argues for granular permissivism, roughly the view that evidence is sometimes permissive between doxastic attitudes at different levels of grain. The argument identifies three sources of rational slack between granularly differing doxastic states: doxastic tidiness, safety, and evidential responsiveness.
Bradford Saad
wiley   +1 more source

Categorial versus naturalized epistemology

Analytic Philosophy, EarlyView.
Abstract How do we know what kinds of things constitute knowledge or justified belief? Naturalized epistemology is committed to denying a priori insight into the kinds of kinds that are and are not knowledge or justification makers. By contrast, it is argued here that knowledge of these matters is a priori knowledge of a special kind.
Nick Zangwill
wiley   +1 more source

The Meteoritical Society: Business from 2023 to 2024

Meteoritics &Planetary Science, Volume 60, Issue 3, Page 680-696, March 2025.
Nancy L. Chabot, Jutta Zipfel, Tasha L. Dunn   +2 more
wiley   +1 more source