Results 71 to 80 of about 2,029 (193)

A Low‐Power Radioisotope XRF Spectrometer for Detection of Light Elements on Planetary Missions

X-Ray Spectrometry, Volume 55, Issue 5, Page 721-729, September/October 2026.
ABSTRACT Current X‐ray spectrometers for in situ geochemical analysis on planetary missions typically rely either on X‐ray tubes, which demand electrical power and add mass and thermal complexity, or on alpha particle X‐ray spectrometers (APXS) that use rare 244 Cm sources, and come with severe concerns on radiation safety and isotope availability.
Leandro Silveri, Artem Knyazev, Hashem Alaidaros, Maryam Manzoor Amanullah, Zach Ioannou, Tengiz Ibrayev, Danish Khan, Sara Leardini, Laura Manenti, Simi Maria Emilia Mangani, Safa Naseem, Sandhya Sharma, Sara Trevisan, Alia Zino, Francesco Arneodo   +14 more
wiley   +1 more source

Martian atmospheric Lee waves [PDF]

Icarus, 1976
Mariner 9 television pictures of Mars extensive mountain lee wave phenomenon in the northern mid-latitudes during winter were evaluated. The characteristic wave length of the lee waves is readily observable, and in a few cases the boundaries of the wave patterns, as well as the wave length, are observed.
openaire   +1 more source

Global Circulation of Martian Ionospheric Currents Revealed by Magnetometer Data

AGU Advances, Volume 7, Issue 6, September 2026.
Abstract In the dynamo region of the Martian ionosphere, a large‐scale current is generated by charge separation: ions collide with neutrals while electrons preferentially gyrate around local magnetic field lines. Using MAVEN magnetometer data and a physics‐informed neural network constrained by Ampère's law and Gauss's law for magnetism (the Neural ...
T. Delcourt, A. Mittelholz
wiley   +1 more source

Sensitivity of the Martian Magnetotail to Model Configuration Choices in Multispecies MHD Simulations

Earth and Space Science, Volume 13, Issue 9, September 2026.
Abstract Numerical modeling has been a key component in the study of the Mars space environment, providing a comprehensive global representation that is not always easy to obtain in spacecraft measurements. However, there are inconsistencies in data‐model and model‐model comparisons, regardless of whether the simulation conditions are identical or ...
Nii‐Boi A. Quartey, Michael W. Liemohn, Wenyi Sun, Yingjuan Ma   +3 more
wiley   +1 more source

Formation and Alteration of Magnesite Nodules From Kunwarara, Queensland, Australia, as an Analog to Mg‐Carbonate Formation on Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.
Abstract Magnesite (MgCO3) is a magnesium (Mg) carbonate mineral that records the aqueous environmental conditions of its formation. On Earth, magnesite forms in metamorphic, diagenetic or pedogenic environments, and distinguishing between these environments is critical for understanding the fluid chemistry during magnesite precipitation. Mg carbonates
E. L. Cardarelli, T. M. Present, P. M. Vasconcelos, L. C. Kah, C. Swindle, S. Bhattacharjee, K. Farley   +6 more
wiley   +1 more source

The Great Cosmic Silence: What Does the Fermi Paradox Tell About the Future of Humanity?

Global Policy, Volume 17, Issue 4, Page 553-565, September 2026.
ABSTRACT This article examines how institutional time horizons shape the long‐term survival prospects of human technological civilisation. While research on global catastrophic and existential risks has expanded, the temporal structures of political‐economic institutions remain underexamined.
Heikki Patomäki
wiley   +1 more source

Life on Mars? The physiological perspective

Experimental Physiology, EarlyView.
Ronan M. G. Berg, Damian M. Bailey
wiley   +1 more source

Biosignature Preservation in Stromatolites From the Carri Laufquen Lakes System, Patagonia: Implications for Martian Palaeolacustrine Environments

Geobiology, Volume 24, Issue 5, September/October 2026.
ABSTRACT The Carri Laufquen Lakes System is a highly alkaline, basalt‐hosted lacustrine environment in northern Patagonia, Argentina. Diverse morphologies of Late Pleistocene sub‐fossil stromatolites occur along the lakeshores. Using detailed optical and electron microscopy, spectroscopy and organic geochemical analyses, this study shows that ...
Victor Amir Cardoso Dorneles, Maëva Millan, Fernando J. Gómez, Primož Šket, Jens Najorka, Cindy Broderick, Wren Montgomery, Barbara Cavalazzi, Keyron Hickman‐Lewis   +8 more
wiley   +1 more source

An estimation of the mass dragged by the solar wind from Mars’s atmosphere in its geologic history [PDF]

Geofísica Internacional, 2001
In the past Mars had a denser atmosphere, but it lacks a magnetic field to protect the ionosphere and exosphere from the solar wind. A model for describing the loss of atmosphere in geologic time is presented.
Héctor Javier Durand-Manterola
doaj  

Development of CCMb: A Low‐Mg Calcite Reference Material for In Situ Measurement of δ18O, δ13C and Selected Trace Elements

Geostandards and Geoanalytical Research, Volume 50, Issue 3, Page 677-700, September 2026.
Key Points Low‐Mg calcite RM developed for in situ microanalysis applications in palaeoclimatology (δ18O, δ13C; Mg, Sr m/m). New data for calcite CRM IAEA‐603 (δ18O, δ13C by SIMS and GS‐IRMS; Mg m/m). No detectable IMF effect of Mg on SIMS δ18O determinations for mass fractions < 3650 μg g‐1.
Andreas T. Hertwig, Maciej G. Śliwiński, Irene Cantarero, Richard A. Stern, Carles Fàbrega, Jakub T. Śliwiński, Thomas Ludwig, František Majs, William Nachlas, John H. Fournelle, Xavier Llovet, Rachelle B. Turnier, David Parcerisa, Anna Travé   +13 more
wiley   +1 more source