Results 81 to 90 of about 34,777 (278)

The search for ancient life on Mars using morphological and mass spectrometric analysis: an analog study in detecting microfossils in Messinian gypsum

Frontiers in Astronomy and Space Sciences
Hydrated sulfate deposits have been detected on Mars. A spaceflight instrument capable of detecting microfossils in these salt deposits is highly important for the search for ancient life on Mars.
Youcef Sellam, Salome Gruchola, Marek Tulej, Peter Keresztes Schmidt, Andreas Riedo, Andreas Riedo, Sofiane Meddane, Peter Wurz, Peter Wurz   +8 more
doaj   +1 more source

The Apparent Involvement of ANMEs in Mineral Dependent Methane Oxidation, as an Analog for Possible Martian Methanotrophy

Life, 2011
On Earth, marine anaerobic methane oxidation (AOM) can be driven by the microbial reduction of sulfate, iron, and manganese. Here, we have further characterized marine sediment incubations to determine if the mineral dependent methane oxidation involves ...
Victoria J. Orphan, Christopher H. House, Emily J. Beal   +2 more
doaj   +1 more source

Surface Waves along the Martian Ionopause

Acta Physica Polonica A, 2013
We study the behaviour of surface waves propagating along the ionopause of the planet Mars and derive the onset criteria for unstable Kelvin Helmholtz modes and negative energy waves at the Martian ionopause. Growth rate of unstable Kelvin Helmholtz mode decreases with wavelength.
N. Kumar, P. Chmielewski, K. Murawski
openaire   +2 more sources

Investigating the Martian atmosphere using the ExoMars 2016 lander [PDF]

, 2015
Accurate modelling of the Martian atmosphere is essential both for planning and completing future missions to the Martian surface, and for accurate analysis and interpretation of the data that they return.
Balme, M. R., Chapman, R. M., Lewis, S. R., Steele, L. J.   +3 more
core  

Field Measurements of Terrestrial and Martian Dust Devils [PDF]

, 2016
Surface-based measurements of terrestrial and martian dust devils/convective vortices provided from mobile and stationary platforms are discussed. Imaging of terrestrial dust devils has quantified their rotational and vertical wind speeds, translation ...
A. Powell, A. Seiff, A.-M. Harri, A.M.C. Oke, A.V. Pathare, B. Jackson, B. Lenoir, C. Bettanini, C. Holstein-Rathlou, C.G. Grant, C.L. Wilson, D. Banfield, D. Reiss, D.A. Gillette, D.A. Gillette, D.E. Fitzjarrald, D.J. Lacks, D.M. Tratt, D.S. Schmidt, D.T. Tyler, D.T. Tyler, E. Leonard-Pugh, E.W.B. Gill, F. Esposito, F. Ferri, Francesca Esposito, G.A. Landis, G.D. Freier, G.D. Hess, G.G. Sorrells, G.G. Sorrells, Gregoire Deprez, H.B. Bluestein, H.P. Gunnlaugsson, Henrik Kahanpää, I.I. Inculet, J. Grotzinger, J. Gómez-Elvira, J. Gómez-Elvira, J. Hallett, J. Ito, J. Latham, J. Latham, J. Lowell, J. Murphy, J. Whiteway, J.-J. Berthelier, J.A. Rodriguez-Manfredi, J.A. Ryan, J.A. Ryan, J.B. Pollack, J.C. Kaimal, J.E. Moores, J.E. Tillman, J.F. Kok, J.F. Kok, J.J. Carroll, J.P. Mason, J.P. Mason, J.P. Merrison, J.P. Williams, J.T. Schofield, J.T. Snow, Jim Murphy, K. Steakley, K.M. Forward, Kathryn Steakley, L. Fenton, L.D.V. Neakrase, L.K. Fenton, L.M. Zelenyi, Lynn Neakrase, M-P. Zorzano, M. Balme, M. Balme, M. Domínguez, M. Golombek, M. Kahre, M. Klose, M.C. Towner, M.D. Ellehoj, M.D. Smith, M.R. Balme, M.S. Howe, M.T. Lemmon, M.T. Lemmon, M.V. Kurgansky, M.V. Kurgansky, M.V. Kurgansky, Manish Patel, Mark Lemmon, Matt Balme, N. Duff, N.O. Renno, N.O. Renno, N.O. Renno, N.R. Williams, Naomi Murdoch, P. Lognonné, P. Lognonné, P. Sinclair, P. Sinclair, P.A. Taylor, P.A. Taylor, P.C. Sinclair, P.H. Smith, P.H. Smith, P.H. Smith, Patrick Whelley, R. Davy, R. Greeley, R. Greeley, R. Lorenz, R. Lorenz, R. Lorenz, R. Sullivan, R.A. Bagnold, R.D. Lorenz, R.D. Lorenz, R.D. Lorenz, R.D. Lorenz, R.D. Lorenz, R.D. Lorenz, R.D. Lorenz, R.D. Lorenz, R.D. Lorenz, R.D. Lorenz, R.D. Lorenz, R.D. Lorenz, R.D. Lorenz, R.D. Lorenz, R.G. Harrison, R.G. Horn, R.I. Lambeth, R.L. Ives, R.L. Schwiesow, R.M. Haberle, Ralph Lorenz, S. Maurice, S. Metzger, S. Rafkin, S.D. Fuerstenau, S.J. Desch, S.L. Hess, S.M. Metzger, S.W. Squyres, T.J. Ringrose, T.J. Ringrose, T.L. Jackson, W.D. Crozier, W.D. Flower, W.R. Harper, Y. Shao, Y.P. Shao   +153 more
core   +5 more sources

A New Lunar Crustal Thickness Model Constrained by Converted Seismic Waves Detected Beneath the Apollo Seismic Network

Geophysical Research Letters, Volume 52, Issue 13, 16 July 2025.
Abstract Analysis of conversions between compressional and shear waves is a workhorse method for constraining crustal and lithospheric structure on Earth; yet, such converted waves have not been unequivocally identified in seismic data from the largest events on the Moon, due to the highly scattered waveforms of shallow seismic events. We reanalyze the
D. Kim, V. Lekić, M. A. Wieczorek, N. C. Schmerr, G. S. Collins, M. P. Panning   +5 more
wiley   +1 more source

Bacillus subtilis Spore Resistance to Simulated Mars Surface Conditions

Frontiers in Microbiology, 2019
In a Mars exploration scenario, knowing if and how highly resistant Bacillus subtilis spores would survive on the Martian surface is crucial to design planetary protection measures and avoid false positives in life-detection experiments.
Marta Cortesão, Felix M. Fuchs, Fabian M. Commichau, Patrick Eichenberger, Andrew C. Schuerger, Wayne L. Nicholson, Peter Setlow, Ralf Moeller   +7 more
doaj   +1 more source

Martian surface properties [PDF]

The objectives were: to characterize surficial geologic units through integration of Infrared Thermal Mapper (IRTM)-derived regolith properties with other existing remote sensing data; to determine the physical and spectral properties of volcanic units ...
Greeley, R.
core   +1 more source

Martian Cratering 4: Mariner 9 Initial Analysis of Cratering Chronology [PDF]

, 1973
Early analyses of cratering and other Martian surface properties that indicated extensive ancient erosion have been strongly supported by Mariner 9 data.
Hartmann, W. K.
core   +1 more source

Stratigraphic Evidence of Backwater Morphodynamics and Lowland River Deltas in the Northern Hemisphere of Mars

Geophysical Research Letters, Volume 52, Issue 12, 28 June 2025.
Abstract Backwater morphodynamics describe feedbacks between hydraulics and sedimentation in fluvio‐deltaic systems in the coastal backwater zone. On Earth, normalized channel belt width decreases approaching the coastline and drops sharply at the start of the backwater zone.
C. M. Hughes, J. B. Shaw, A. M. Fernandes, T. E. Swanson   +3 more
wiley   +1 more source