Results 41 to 50 of about 165,848 (175)

Xenoliths in meteorites: Insights into the dynamics of material exchange between asteroids

Meteoritics &Planetary Science, EarlyView.
Abstract A minor fraction of meteorites contains xenoliths, that is, clasts that were formed on a different parent body than that of the host lithology. The occurrence of xenoliths is direct evidence for the exchange of material between asteroids, including exchanges between asteroids from the carbonaceous (CC) and non‐carbonaceous (NC) reservoirs ...
J. Gattacceca, B. Devouard, L. Bonal, Y. Marrocchi, A. Greshake, R. Tartèse, M. Gounelle, D. AuYang, C. Sonzogni, M. Hutson, A. Irving, C. Agee, T. Shisseh, A. Love, V. Vidal, D. Borschneck, S. A. Eckley, A. Morbidelli   +17 more
wiley   +1 more source

On Our Cosmic (In)significance

Ratio, EarlyView.
ABSTRACT This article discusses three interpretations of cosmic significance, all of which reveal something important about the notion of significance. Along the way, it proposes a unified view of significance by combining elements of each of the views.
Oskari Sivula
wiley   +1 more source

Perennially ice‐covered lake facies as proxies for ice cover properties and climate: Insights from Lake Joyce, Antarctica

Sedimentology, EarlyView.
ABSTRACT Process‐based depositional models for perennially ice‐covered lakes (PICLs) are important for interpreting palaeolake deposits and their connection to past climate. PICLs are only stable under specific climate states, and unlike other ice‐free or seasonally ice‐covered lakes, PICL deposits generally have bimodal grain sizes: mud introduced by ...
Frances Rivera‐Hernández, Dawn Y. Sumner, Tyler J. Mackey   +2 more
wiley   +1 more source

Shear-Induced ringwoodite formation in the Martian shergottite Dar al Gani 670 [PDF]

, 2013
Shock-produced melt veins in the Martian shergottite Dar al Gani 670 crosscut large olivine crystals. The upper part of one of these crystals appears to be sheared off and displaced along the shock vein.
Fritz, Jörg, Goran, Daniel, Greshake, Ansgar, Böttger, Ute   +3 more
core   +1 more source

The MMX InfraRed Spectrometer (MIRS) for the spectral characterization of the Martian system

Progress in Earth and Planetary Science
MIRS (MMX InfraRed Spectrometer) is a push-broom imaging spectrometer onboard of the JAXA sample return MMX mission. It has been built by the French laboratory LESIA, today LIRA (Laboratory for Instrumentation and Research in Astrophysics) of Paris ...
Maria Antonietta Barucci, Pernelle Bernardi, Jean-Michel Reess, Sonia Fornasier, Frederic Merlin, Alain Doressoundiram, Thomas Gautier, Takahiro Iwata, Hiromu Nakagawa, Tomoki Nakamura, Christophe Donny, Sadok Abbaki, Shohei Aoki, Takehiko Arai, Pierre Beck, Marion Bonafous, Martin Boutelier, Jean-Christophe Bouquier, John Robert Brucato, Mickael Bruno, Jean-Tristan Buey, Matthieu Castelnau, Sebastien Charnoz, Marc Chaussidon, Frederic Chapron, Athena Coustenis, Willy D’anna, Gael David, Marco Delbo, Bruno Dubois, Sebastien Etcheverry, Catherine Garat, Stephane Gauffre, Hidenori Genda, Fabrice Glize, Rafik Hassen-Khodja, Valentin Hazard, Gilles Hervet, Ryuki Hyodo, Takeshi Imamura, Christian Imbert, Sophie Jacquinod, Laurent Jorda, Shingo Kameda, Driss Kouach, Toru Kouyama, Takeshi Kuroda, Hiroyuki Kurokawa, Laurent Lapauw, Jeremie Lasue, Laetitia Le Deit, Michel Le Du, Cedric Leyrat, Christophe Mathé, Moe Matsuoka, Maeva Millan, Hideaki Miyamoto, Frederic Moynier, Napoléon Nguyen Tuong, Kazunori Ogohara, Takahito Osawa, Jerome Parisot, Paolo Pilleri, Veronique Piou, Giovanni Poggiali, Nathalie Pons, Benjamin Quertier-Dagorn, Antsa Rasamoela, Sean Raymond, Francis Rocard, Anne Rouvié, Takeshi Sakanoi, Takao M. Sato, Hervé Soulie, Eric Sawyer, Aymeric Spiga, Robin Sultana, Nicolas Theret, Sylvain Trémolières, Pascal Truchelut, Fuminori Tsuchiya, Pierre Vernazza, Antonin Wargnier, Koki Yumoto, Didier Zeganadin   +84 more
doaj   +1 more source

Sesquinary catenae on the Martian satellite Phobos from reaccretion of escaping ejecta [PDF]

Nature Communications, 2016
AbstractThe Martian satellite Phobos is criss-crossed by linear grooves and crater chains whose origin is unexplained. Anomalous grooves are relatively young, and crosscut tidally predicted stress fields as Phobos spirals towards Mars. Here we report strong correspondence between these anomalous features and reaccretion patterns of sesquinary ejecta ...
M. Nayak, E. Asphaug
openaire   +4 more sources

Regolith Simulant Adhesion to Polycarbonate and PDMS: Deposition Methods, Coverage, and Removal Resistance

Macromolecular Materials and Engineering, Volume 311, Issue 11, November 2026.
Adhesion of lunar and Martian regolith simulants to polymer surfaces was investigated using air and rolling contact deposition. Polycarbonate showed significantly lower adhesion than PDMS, suggesting that substrate stiffness may play a more significant role than surface energy in controlling regolith adhesion.
Emma Nolan, Emily Power, Dylan Doherty, Susan M. Kelleher   +3 more
wiley   +1 more source

Automated Shape-model-based Astrometry of Phobos from Mars Express Super Resolution Channel Images

The Astronomical Journal
High-resolution spacecraft images provide important astrometric constraints for orbit refinement, but measurements of resolved bodies are often limited by labor-intensive control-point selection and the difficulty of achieving consistent reductions over ...
Wangxin Lai, Qingfeng Zhang, Rui Zhang, Kai Tang, Chunyu Ding, Zhan Li, Haipeng Wang   +6 more
doaj   +1 more source

Effects of Ambient Moisture and Large‐Strain Dynamic Preloading on the Dynamic Properties of the EAC‐1A Regolith Simulant

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 50, Issue 16, Page 5701-5711, November 2026.
ABSTRACT The EAC‐1A lunar mare simulant, a silty sand, was selected by the European Astronaut Center (EAC) for use in the LUNA analogue facility's lunar simulation testbed. Its stress‐ and strain‐dependent shear modulus and damping ratio were determined via resonant column testing on specimens prepared either from ambient moisture material or oven ...
Christos Vrettos
wiley   +1 more source

Suprathermal Electron Acceleration Comparison of the Venusian and Terrestrial Bow Shocks

Journal of Geophysical Research: Space Physics, Volume 131, Issue 11, November 2026.
Abstract We study suprathermal electron acceleration at the Venusian bow shock using the Parker Solar Probe gravity assists and the Venus Express spacecraft mission. The acceleration is classified by measuring the maximum energy and the power‐law spectral slope (index) of the electron phase space density immediately downstream of the shocks for ...
M. Lindberg, H. Hietala, S. Nyberg, Y. Futaana, H. George   +4 more
wiley   +1 more source