Results 81 to 90 of about 25,419 (252)
International Astronomical Union Colloquium, 1971 The Martian satellites are some of the most interesting and accessible objects in the solar system, and therefore worth studying or even visiting. As small bodies, on the order of kilometers in diameter (see table I), they may have experienced no internal heating or volcanism, and could therefore be original condensations in the solar system.
openaire +2 more sources
Evidence for Phosphate Metasomatism in an Olivine‐Rich Achondrites
Meteoritics &Planetary Science, EarlyView.Abstract Brachinites, brachinite‐like achondrites (BLA), and other similar primitive achondrites offer important constraints on differentiation processes of the earliest formed planetesimals, as they quenched amidst early differentiation processes on their parent body. Geochemical data for all major mineral phases in two previously poorly characterized
Robert W. Nicklas +5 more
wiley +1 more source
Dune formation on the present Mars [PDF]
, 2007 We apply a model for sand dunes to calculate formation of dunes on Mars under the present Martian atmospheric conditions. We find that different dune shapes as those imaged by Mars Global Surveyor could have been formed by the action of sand-moving winds occuring on today's Mars.
arxiv +1 more source
A complete inventory of institutional and public meteorite collections in Switzerland
Meteoritics &Planetary Science, EarlyView.Abstract Museums and universities are important for collecting, maintaining, and curating meteorites. To make specimens known and available for research, inventorying and optimal curation are important. However, not all meteorite collections are well curated, especially in smaller institutions.
J. Eschrig +2 more
wiley +1 more source
UniverseIn recent decades, extensive research has led to the understanding that Mars once hosted substantial liquid-water reserves. While the current Martian landscape boasts significant water-ice deposits at its North and South poles, the elusive presence of ...
Junyi Zhou +6 more
doaj +1 more source
Arithmetical pluralism and the objectivity of syntax
Noûs, EarlyView.Abstract Arithmetical pluralism is the view that there is not one true arithmetic but rather many apparently conflicting arithmetical theories, each true in its own language. While pluralism has recently attracted considerable interest, it has also faced significant criticism.
Lavinia Picollo, Daniel Waxman
wiley +1 more source
Geophysical Research LettersThe Martian bow shock (BS) plays a significant role in the Martian plasma environment. Based on observations from Tianwen‐1 and MAVEN, we first report two cases of simultaneous two‐point crossings of the Martian BS affected by an interplanetary coronal ...
Ming Wang +9 more
doaj +1 more source
Temporal and Spatial Prediction of Column Dust Optical Depth Trend on Mars Based on Deep Learning
Remote SensingDust storms, as an important extreme weather event on Mars, have significant impacts on the Martian atmosphere and climate and the activities of Martian probes. Therefore, it is necessary to analyze and predict the activity trends of Martian dust storms.
Xiangxiang Yan +3 more
doaj +1 more source
Modeling Solar Proton Event-induced Martian Surface Radiation Dose [PDF]
arXiv, 2020 Solar Proton Events (SPEs) can cause abrupt and significant enhancements to the Martian surface radiation dose. Observations of the impact of SPEs on the Martian surface are available from satellites and surface detectors, but the data set is very limited in time, and the energy range is limited in scope, which makes it insufficient to estimate the ...
arxiv
On production of gamma rays and Relativistic Runaway Electron Avalanches from Martian dust storms [PDF]
, 2017 Production of runaway electron avalanches and gamma rays originating inside Martian dust storms are studied using Monte Carlo simulations. In the absence of in situ measurements, we use theoretical predictions of electric fields inside dust storms.
arxiv +1 more source