Results 31 to 40 of about 14,986 (134)
Meteoritics &Planetary Science, EarlyView.Abstract The Campo del Cielo iron meteorite (IAB‐MG) provides a unique window into early solar system processes, particularly the formation and evolution of carbon phases in non‐magmatic iron meteorites. In this study, we conducted a systematic nanostructural investigation of three distinct graphite occurrences—cliftonite (type I), interstitial ...
Xiao Tian Deng +8 more
wiley +1 more source
Low Mg/Si planetary host stars and their Mg-depleted terrestrial planets
, 2012 Simulations have shown that a diverse range of extrasolar terrestrial planet bulk compositions are likely to exist, based on the observed variations in host star elemental abundances.
Asplund +19 more
core +1 more source
Sampling the volcanic plumes at Io: Impact speeds and shock conditions
Meteoritics &Planetary Science, EarlyView.Abstract The desire to sample material from the interior of Io, by flying through its volcanic plumes, requires consideration of the flyby speed and the types of sample collection techniques that can be utilized. Low speed collection (1–2.5 km s−1) would require an orbit around Io itself, which is unlikely due to the accumulated radiation dose that ...
M. J. Burchell +2 more
wiley +1 more source
, 2017 We report and discuss the discovery of a comoving pair of bright solar-type stars, HD 240430 and HD 240429, with a significant difference in their chemical abundances.
Brewer, John M. +5 more
core +1 more source
Toward a “strong” normativity of fear in Hans Jonas and Aristotle
The Southern Journal of Philosophy, EarlyView.Abstract What does it mean to say that one “ought” to undergo an emotion? In The Imperative of Responsibility, Hans Jonas provocatively asserts that twentieth‐century citizens “ought” to fear for the well‐being of future generations. I argue that Jonas's demand is not straightforwardly reducible to claims about the fittingness, expedience, or aretaic ...
Magnus Ferguson
wiley +1 more source
Constraining the volatile fraction of planets from transit observations [PDF]
, 2016 The determination of the abundance of volatiles in extrasolar planets is very important as it can provide constraints on transport in protoplanetary disks and on the formation location of planets.
Alibert, Yann
core +2 more sources
(Co‐)Reference All the Way Down: A Unified Theory of (Pro) Nominals in Ordinary English
Theoria, EarlyView.ABSTRACT This essay joins two themes, both arising from Kripke's inspiring ideas in the theory of reference. The first theme concerns reference in general. The second examines the notion of co‐reference and the role it plays in a unified theory of pronouns for natural language.
Jessica Pepp, Joseph Almog
wiley +1 more source
The Diversity of Extrasolar Terrestrial Planets
, 2010 Extrasolar planetary host stars are enriched in key planet-building elements. These enrichments have the potential to drastically alter the building blocks available for terrestrial planet formation.
Asplund +8 more
core +1 more source
The effect of aqueous alteration and metamorphism in the survival of presolar silicate grains in chondrites [PDF]
, 2008 Relatively small amounts (typically between 2-200 parts per million) of presolar grains have been preserved in the matrices of chondritic meteorites.
Bischoff +31 more
core +2 more sources
Transactions of the Institute of British Geographers, EarlyView.Abstract It is widely accepted that Henri Lefebvre's Marxism had anarchistic traits, but few have tried to specify what these traits are, or what they mean. This paper argues that Lefebvre's work should be seen as first and foremost an anti‐authoritarian theory that uses space, rather than a spatial theory.
Hamish Kallin
wiley +1 more source