Results 51 to 60 of about 165,848 (175)

Stationary flux ropes at the southern terminator of Mars [PDF]

, 2012
Flux ropes have long been observed in the upper atmosphere of Venus, and more recently at Mars. Here we present magnetic field measurements of flux ropes encountered at the southern terminator of Mars by Mars Global Surveyor, and compare them to a flux ...
Beharrell, Mat, Wild, James
core   +4 more sources

Depositional History of the Otis Peak Formation, Western Fan, Jezero Crater, Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 11, November 2026.
Abstract The Mars 2020 Perseverance rover mission spent ∼250 sols investigating the Otis Peak formation (OPfm), a sequence of rocks containing the youngest recorded interval of sediment deposition via aqueous activity on Jezero crater’s western fan. This study uses orbiter and rover observations to interpret the formation and emplacement history of the
Samantha Gwizd, Kathryn M. Stack, Michael P. Lamb, Libby R. W. Ives, Sanjeev Gupta, Alicia Vaughan, Steven Sholes, Rachel Kronyak, Nicolas Randazzo, Justin I. Simon, Larry Crumpler, Jim Rice, Briony Horgan, Linda Kah, Natalie Cavallo, Nathan Williams, Robert Barnes, Opal Ciancolo, Cathy Quantin‐Nataf, Olivier Beyssac, Vivian Sun, David Shuster, Joana R. C. Voigt, James F. Bell III, Justin Maki, Kirsten Siebach, Marion Nachon   +26 more
wiley   +1 more source

Laboratory Experiments Identify Meteoritic Organic Precursors for Chlorinated Compounds Detected by the Sample Analysis at Mars (SAM) Instrument at Gale Crater

Journal of Geophysical Research: Planets, Volume 131, Issue 11, November 2026.
Abstract The Viking missions landed two spacecraft on Mars each equipped with a pyrolysis‐gas chromatograph‐mass spectrometer system capable of detecting signs of life. Although working as intended, detections of chloromethane and dichloromethane were initially attributed to terrestrial contamination.
A. Mojarro, J. Herrera, A. Sistiaga, S. S. O’Reilly, J. C. Aponte, A. Buch, J. L. Eigenbrode, D. P. Glavin, C. Freissinet, M. Millan, C. Szopa, R. E. Summons   +11 more
wiley   +1 more source

Computer modeling and experimental work on the astrobiological implications of the martian subsurface ionising radiation environment [PDF]

, 2008
Any microbial life extant in the top meters of the martian subsurface is likely to be held dormant for long periods of time by the current permafrost conditions.
Dartnell, Lewis R, Dartnell, L.R.
core  

Two Possible Orbital Histories of Phobos

The Planetary Science Journal
The two moons of Mars, Phobos and Deimos, have orbits that are close to the Martian equator, indicating their formation from a circumplanetary disk. Phobos is currently migrating toward Mars due to tidal dissipation within the planet and may be disrupted
Matija Ćuk, Kaustub P. Anand, David A. Minton   +2 more
doaj   +1 more source

Impact Crater Hydrothermal Systems Support Rapid Microbial Enrichment and Diverse Metabolic Potential

Geobiology, Volume 24, Issue 6, November/December 2026.
ABSTRACT Impact crater hydrothermal systems, formed after asteroid and comet impacts, have been proposed as promising habitats for life on early Earth and as key targets in the search for life on planetary bodies such as Mars, since they provide liquid water and active geochemical turnover.
Sabrina M. C. Hardy, Emily J. Aguilar‐Pine, Sean Gulick, Alaa Ahmad, Brett J. Baker, Nathalie Scott, Georgina Aitolo, Naomi Felton, Charles S. Cockell   +8 more
wiley   +1 more source

Radar investigation of asteroids and planetary satellites [PDF]

, 1991
Radar reconnaissance of near-Earth asteroids, mainbelt asteroids, the Galilean satellites, the Martian satellites, and large Saturnian satellites, using the Arecibo 13-cm and the Goldstone 3.5-cm systems is discussed.
Ostro, Steven J.
core  

Effect of oxygen ion irradiation on the visible, infrared, and Raman spectra of Phobos candidate materials: implications on the space weathering by Martian atmosphere-derived ions

Progress in Earth and Planetary Science
The origin of Martian satellites is still under debate. Nevertheless, such information could give insights into the evolution of the Martian system and planetary formation processes.
Haruhisa Tabata, Koki Yumoto, Oya Kawashima, Tomohiro Usui   +3 more
doaj   +1 more source

Seasonal Variations of the Martian Middle‐Atmosphere CO2/Ar Ratio Inferred From MAVEN/NGIMS Observations

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract The carbon dioxide (CO2)/argon (Ar) ratio is a useful tracer of atmospheric circulation on Mars, but it remains observationally poorly constrained in the middle atmosphere, where large‐scale circulation occurs. In this study, we infer the CO2/Ar ratio at the homopause, which marks the upper boundary of the well‐mixed Martian middle atmosphere,
JunFeng Qin, Shannon Curry, Michael S. Chaffin, Yuni Lee, François Forget   +4 more
wiley   +1 more source

On the Feasibility of Laser Satellite Communications from the Martian Surface

IAF Space Communications and Navigation Symposium
Free space optical (FSO) communication using lasers is a rapidly developing field in telecommunications that can offer advantages over traditional radio frequency technology. For example, optical laser links may allow transmissions at far higher data rates, require less operating power and smaller systems and have a smaller risk of interception.
Fernandez Rodriguez, E., Rowland, Z.C., Overzier, R.A.   +2 more
openaire   +3 more sources