Results 121 to 130 of about 736,131 (304)

Nakhlite Emplacement as Constrained by X‐Ray Computed Tomography and 3D Quantitative Textural and Petrofabric Analyses

Journal of Geophysical Research: Planets, Volume 130, Issue 12, December 2025.
Abstract Nakhlites, clinopyroxene‐rich rocks, are the largest single‐origin suite of samples from Mars. Despite extensive study to discern their petrogenetic histories, nakhlite emplacement mechanisms and environments are not well‐constrained, and it is unknown whether they represent intrusive or extrusive igneous rocks, or a combination.
Sierra R. Ramsey, Piper Irvin, Arya Udry, Scott A. Eckley, Amanda Ostwald, Richard A. Ketcham   +5 more
wiley   +1 more source

Mars 2020 Perseverance Rover Studies of the Martian Atmosphere Over Jezero From Pressure Measurements. [PDF]

J Geophys Res Planets, 2023
Sánchez-Lavega A, Del Rio-Gaztelurrutia T, Hueso R, Juárez MT, Martínez GM, Harri AM, Genzer M, Hieta M, Polkko J, Rodríguez-Manfredi JA, Lemmon MT, Pla-García J, Toledo D, Vicente-Retortillo A, Viúdez-Moreiras D, Munguira A, Tamppari LK, Newman C, Gómez-Elvira J, Guzewich S, Bertrand T, Apéstigue V, Arruego I, Wolff M, Banfield D, Jaakonaho I, Mäkinen T.   +26 more
europepmc   +1 more source

Abrasion Patch Dehydration Experiment at Bright Angel, Jezero Crater, Using SuperCam Onboard the Mars 2020 Perseverance Rover

Journal of Geophysical Research: Planets, Volume 130, Issue 12, December 2025.
Abstract Investigating the stability of hydrated minerals is integral for examining the preservation of rocks for potential Mars Sample Return and has major implications for models that use rover‐based observations to quantify Mars' global water budget.
S. A. Connell, R. C. Wiens, L. Mandon, C. C. Bedford, S. Siljeström, S. Schröder, G. M. Martínez, Á. Vicente‐Retortillo, E. A. Cloutis, D. M. Applin, A. Broz, C. Royer, J. R. Johnson, J. Van Beek, T. Nelson, E. Clavé, F. Poulet, P. Beck, E. Dehouck, T. Fornaro, T. Fouchet, A. Jones, A. Alberini, A. Cousin, K. Hand, K. Uckert, J. A. Rodríguez‐Manfredi, K. M. Stack, the Mars 2020 team   +28 more
wiley   +1 more source

Evaluating Local Ionization Balance in the Nightside Martian Upper Atmosphere during MAVEN Deep Dip Campaigns

Astrophysical Journal, 2019
Combining the Mars Atmosphere and Volatile Evolution (MAVEN) measurements of atmospheric neutral and ion densities, electron temperature, and energetic electron intensity, we perform the first quantitative evaluation of local ionization balance in the ...
J. Cui, Y.‐T. Cao, X.‐S. Wu, S.-S. Xu, R. Yelle, S. Stone, E. Vigren, N. Edberg, Chenlong Shen, F. He, Y. Wei   +10 more
semanticscholar   +1 more source

Assimilation of Both Column- and Layer-Integrated Dust Opacity Observations in the Martian Atmosphere. [PDF]

Earth Space Sci, 2021
Ruan T, Young RMB, Lewis SR, Montabone L, Valeanu A, Read PL.   +5 more
europepmc   +1 more source

Compression of Martian atmosphere for production of oxygen [PDF]

The compression of CO2 from the Martian atmosphere for production of O2 via an electrochemical cell is addressed. Design specifications call for an oxygen production rate of 10 kg per day and for compression of 50 times that mass of CO2.
Cutler, A. H., Lynch, D. C., Nolan, P. E.   +2 more
core   +1 more source

Mars: The Viking discoveries [PDF]

, 1977
An overview of the Viking Mars probe is presented. The Viking spacecraft is described and a brief history of the earlier observations and exploration of Mars is provided.
French, B. M.
core   +2 more sources

Evolution of Terrestrial Planetary Bodies and Implications for Habitability

Reviews of Geophysics, Volume 63, Issue 4, December 2025.
Abstract The terrestrial planetary bodies of our solar system—Mercury, Venus, Earth, and Mars—share a common origin through nebular accretion and early magma ocean differentiation, yet they diverged significantly in geological evolution, tectonic regimes, and habitability.
Peter A. Cawood, Eva E. Stüeken, Priyadarshi Chowdhury, Chris J. Hawkesworth, Jacob A. Mulder   +4 more
wiley   +1 more source

Climate Emergency and Different Ways to Fail? The Fermi Paradox, the Simulation Hypothesis, Agency and Hope

Journal for the Theory of Social Behaviour, Volume 55, Issue 4, December 2025.
ABSTRACT Humanity seems stuck on different ways to fail to meet the challenge posed by a declared climate emergency and manifest the problems of ecological breakdown. Rather than reprise these failures, we use the Fermi Paradox and simulation hypothesis to make a simple point about agency. The argument unfolds in two sections.
Jamie Morgan
wiley   +1 more source

Proceedings of the MECA Workshop on The Evoluation of the Martian Atmosphere [PDF]

Topics addressed include: Mars' volatile budget; climatic implications of martian channels; bulk composition of Mars; accreted water inventory; evolution of CO2; dust storms; nonlinear frost albedo feedback on Mars; martian atmospheric evolution; effects
Carr, M., Conway, L., James, P., Pepin, R., Pollack, J.   +4 more
core   +1 more source