Results 51 to 60 of about 1,143 (171)

Primordial N2 provides a cosmochemical explanation for the existence of Sputnik Planitia, Pluto [PDF]

Icarus, vol. 313, pp. 79-92, 2018, 2018
The presence of N2 in the surface environment of Pluto is critical in creating Pluto's richness of features and processes. Here, we propose that the nitrogen atoms in the N2 observed on Pluto were accreted in that chemical form during the formation of Pluto.
arxiv   +1 more source

Evolution of Water Reservoirs on Mars: Constraints from Hydrogen Isotopes in Martian Meteorites

, 2014
Martian surface morphology implies that Mars was once warm enough to maintain persistent liquid water on its surface. While the high D/H ratios (~6 times the Earth's ocean water) of the current martian atmosphere suggest that significant water has been ...
Dohm, James M., Kurokawa, Hiroyuki, Matsuyama, Takeshi, Moriwaki, Ryota, Sato, Masahiko, Ushioda, Masashi, Usui, Tomohiro   +6 more
core   +1 more source

The Periglacial Landforms and Estimated Subsurface Ice Distribution in the Northern Mid‐Latitude of Mars

Journal of Geophysical Research: Planets, Volume 130, Issue 1, January 2025.
Abstract Subsurface ice in the mid‐latitude regions is a significant water inventory on present‐day Mars, and their volume and distribution are thought to have varied due to the orbitally induced paleoclimatic changes. Using high‐resolution satellite images, the present study explores the distributions of three presumed periglacial landforms (thermal ...
Takaki Sako, Hitoshi Hasegawa, Trishit Ruj, Goro Komatsu, Yasuhito Sekine   +4 more
wiley   +1 more source

Mud flows in the Southwestern Utopia Planitia, Mars

AbstractHere we present the results of our mapping of a large field of landforms characterized by flow-like morphology in the southwestern part of Utopia Planitia. They have been previously interpreted as mud flows associated with a partly frozen muddy ocean [1,2].
Vojtěch Cuřín, Petr Brož, Ernst Hauber, Yannis Markonis   +3 more
openaire   +2 more sources

Curvature driven acceleration : a utopia or a reality ? [PDF]

Class.Quant.Grav.23:4159-4166,2006, 2005
The present work shows that a combination of nonlinear contribution from the Ricci curvature in Einstein field equations can drive a late time acceleration of expansion of the universe. The transit from the decelerated to the accelerated phase of expansion takes place smoothly without having to resort to a study of asymptotic behaviour.
arxiv   +1 more source

The First Global Catalog of Rockfall Locations on Mars

Geophysical Research Letters, Volume 51, Issue 24, 28 December 2024.
Abstract Rockfalls are ubiquitous expressions of present‐day landscape evolution across the solar system. On Mars, their distribution has been proposed to indicate endo‐ and exogenic drivers, such as tectonic activity and solar‐driven thermal fatigue. Here, we present the first global catalog of 1,383 rockfall‐bearing locations on Mars, derived using ...
V. T. Bickel, I. J. Daubar, A. J. Sokolowska, A. Bonab, I. Haut, S. J. Conway   +5 more
wiley   +1 more source

Studies of Glacial and Periglacial Environments on Mars [PDF]

, 2017
This thesis presents the development and application of a grid-based mapping approach that provides an efficient solution to the problems of mapping small landforms over large areas.
Ramsdale, Jason David
core   +1 more source

Initial results of the meteorological data from the first 325 sols of the Tianwen-1 mission [PDF]

, 2023
As the Zhurong rover landed on the surface of Mars in 2021, it began a months-long collection of Mars data. Equipped with highly sensitive sensors, Zhurong is capable of being a meteorological station at the surface of Mars. The Mars Climate Station, one
Du, Sen, Jiang, Chunsheng, Jiang, Yu, Li, Hengnian   +3 more
core   +1 more source

Organic Carbon and Ca‐Rich Carbonate Detections in Soils of the Northern Plains, Mars: Evaluation of Unreported Data From the Mars Phoenix Scout's Thermal Evolved Gas Analyzer (TEGA)

Journal of Geophysical Research: Planets, Volume 129, Issue 10, October 2024.
Abstract The Thermal Evolved Gas Analyzer (TEGA) analysis of surface and icy subsurface Phoenix landing site soils consisted of low (300–700°C) and high (>700°C) temperature CO2 evolutions that were attributed to organic carbon (83–1,484 μgC/g) and Ca‐rich carbonate (1.1–2.6 wt.%).
B. Sutter, P. D. Archer, P. B. Niles, D. W. Ming, D. Hamara, W. V. Boynton   +5 more
wiley   +1 more source

Likely Ferromagnetic Minerals Identified by the Perseverance Rover and Implications for Future Paleomagnetic Analyses of Returned Martian Samples

Journal of Geophysical Research: Planets, Volume 129, Issue 9, September 2024.
Abstract Although Mars today does not have a core dynamo, magnetizations in the Martian crust and in meteorites suggest a magnetic field was present prior to 3.7 billion years (Ga) ago. However, the lack of ancient, oriented Martian bedrock samples available on Earth has prevented accurate estimates of the dynamo's intensity, lifetime, and direction ...
Elias N. Mansbach, Tanya V. Kizovski, Eva L. Scheller, Tanja Bosak, Lucia Mandon, Briony Horgan, Roger C. Wiens, Christopher D. K. Herd, Sunanda Sharma, Jeffrey R. Johnson, Travis S. J. Gabriel, Olivier Forni, Yang Liu, Mariek E. Schmidt, Benjamin P. Weiss   +14 more
wiley   +1 more source