Results 41 to 50 of about 80,597 (275)

Martian seismicity

open access: yesGeophysical Research Letters, 1979
During the Viking mission to Mars, the seismometer on Lander II collected approximately 0.24 Earth years of observational data, excluding periods of time dominated by wind‐induced Lander vibration. The “quiet‐time” data set contains no confirmed seismic events.
Neal R. Goins, Andrew R. Lazarewicz
openaire   +1 more source

In situ observations of ions and magnetic field around Phobos: the mass spectrum analyzer (MSA) for the Martian Moons eXploration (MMX) mission

open access: yesEarth, Planets and Space, 2021
The mass spectrum analyzer (MSA) will perform in situ observations of ions and magnetic fields around Phobos as part of the Martian Moons eXploration (MMX) mission to investigate the origin of the Martian moons and physical processes in the Martian ...
Shoichiro Yokota   +16 more
doaj   +1 more source

On the Impact Origin of Phobos and Deimos I: Thermodynamic and Physical Aspects

open access: yes, 2017
Phobos and Deimos are the two small moons of Mars. Recent works have shown that they can accrete within an impact-generated disk. However, the detailed structure and initial thermodynamic properties of the disk are poorly understood.
Charnoz, Sébastien   +3 more
core   +2 more sources

In Situ Methanation on Mars: A Process Concept Study on the Impact of H2/CO2 and Recycle Ratio

open access: yesChemie Ingenieur Technik, EarlyView.
The rocket propellant methane can be produced on Mars by in situ resource utilization. The H2/CO2 ratio is decisive, and excess H2 is favored for providing sufficient propellant purity. The operation mode—with or without recycling of unreacted reactants—depends on the resource availability of the selected landing site. Abstract For return missions from
Franz Braun   +4 more
wiley   +1 more source

Investigation on Computing Method of Martian Dust Fluid Based on the Energy Dissipation Method

open access: yesInternational Journal of Aerospace Engineering, 2020
In this paper, an initiative Martian dust fluid simulating research based on the energy dissipation method was developed to simulate the deposition process of Martian dust fluid which was caused by surface adhesion between particles and Martian rovers ...
Tianxiang Ding   +6 more
doaj   +1 more source

Characterization of dust activity on Mars from MY27 to MY32 by PFS-MEX observations [PDF]

open access: yes, 2018
We present spatial and temporal distributions of dust on Mars from Ls = 331 in MY26 until Ls = 80 in MY33 retrieved from the measurements taken by the Planetary Fourier Spectrometer (PFS) aboard Mars Express.
Aoki, Shohei   +6 more
core   +2 more sources

Raman Spectroscopic Analysis and In Situ Heating Experiments on Adranosite Minerals

open access: yesJournal of Raman Spectroscopy, EarlyView.
This study provides the first detailed Raman spectroscopic characterization of rare ammonium sulfates adranosite, iron‐rich adranosite, and adranosite‐(Fe) from volcanic and coal‐fire environments. Distinct spectral features reveal compositional differences and structural effects of Fe substitution.
Filip Košek   +4 more
wiley   +1 more source

THE USE OF RELIGIOUS AND POLITICAL RITUALS IN CONTEMPORARY COMMUNICATION [PDF]

open access: yesSocietate şi Politică, 2011
This article identifies the main characteristics and trends inthe development of media power in the context of increasing its connection with the otherpowers in the society, especially with the political and ecclesiastic power.
IOVAN MARTIAN
doaj  

The intertwined fate of agriculture and human expansion: Gaps and solutions for scalable space crop systems

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
As humanity prepares for sustained life beyond Earth, developing resilient, resource‐efficient food systems is essential. This research outlines a strategic roadmap for scalable space agriculture, addressing key challenges in crop resilience, substrate performance, and autonomous life‐support integration.
Rafael Loureiro, Andrew Palmer
wiley   +1 more source

Microbial growth in actual martian regolith in the form of Mars meteorite EETA79001

open access: yesCommunications Earth & Environment, 2023
Studies to understand the growth of organisms on Mars are hampered by the use of simulants to duplicate martian mineralogy and chemistry. Even though such materials are improving, no terrestrial simulant can replace a real martian sample.
Neveda Naz   +3 more
doaj   +1 more source

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