Results 151 to 160 of about 25,282 (206)

The scientific value of Mars Sample Return. [PDF]

Proc Natl Acad Sci U S A
McSween HY, Thiemens MH.
europepmc   +1 more source

Ultrastructure of <i>Serratia liquefaciens</i> Grown at 7 mbar Under Simulated Martian Conditions. [PDF]

Microorganisms
Schuerger AC, Kelley KL.
europepmc   +1 more source

Potential pulmonary toxic effects of Martian dust simulant. [PDF]

iScience
Ji J, Petriglieri JR, Turci F, Sompa S, Gerde P, Karlsson LL, Linnarsson D, Loftus DJ, Prisk GK, Staufer U, Tranfield EM, van Westrenen W, Palmberg L.   +12 more
europepmc   +1 more source

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Martian Atmospheric Erosion Rates

Science, 2007
Mars was once wet but is now dry, and the fate of its ancient carbon dioxide atmosphere is one of the biggest puzzles in martian planetology. We have measured the current loss rate due to the solar wind interaction for different species: Q(O + ) = 1.6·10 23 per second = 4 grams per second (g ...
Stas, Barabash, Andrei, Fedorov, Rickard, Lundin, Jean-Andre, Sauvaud   +3 more
openaire   +2 more sources

Isotopic Composition of the Martian Atmosphere

Science, 1976
Results from the neutral mass spectrometer carried on the aeroshell of Viking 1 show evidence for NO in the upper atmosphere of Mars and indicate that the isotopic composition of carbon and oxygen is similar to that of Earth. Mars is enriched in 15 N relative to Earth by about 75 percent, a consequence of escape ...
Nier, Alfred O., McElroy, Michael B., Yung, Yuk Ling   +2 more
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CO2 solubility in Martian basalts and Martian atmospheric evolution

Geochimica et Cosmochimica Acta, 2011
Abstract To understand possible volcanogenic fluxes of CO 2 to the Martian atmosphere, we investigated experimentally carbonate solubility in a synthetic melt based on the Adirondack-class Humphrey basalt at 1–2.5 GPa and 1400–1625 °C. Starting materials included both oxidized and reduced compositions, allowing a test of the effect of iron oxidation
Ben D. Stanley, Marc M. Hirschmann, Anthony C. Withers   +2 more
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Disentangling xenon components in Nakhla: martian atmosphere, spallation and martian interior

Geochimica et Cosmochimica Acta, 2001
A powdered sample of Nakhla was separated into 3 subsamples. One was left otherwise untreated, one was washed in water and one etched with HNO3 removing 6% of the original mass. We report results of isotopic analysis of xenon released by laser step heating on aliquots of each of these subsamples; some aliquots were neutron irradiated before isotopic ...
Gilmour, J. D., Whitby, J. A., Turner, G.   +2 more
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Atmospheric maneuvering during Martian entry

15th Atmospheric Flight Mechanics Conference, 1988
A comparative-advantages study is made of two different Martian atmospheric entry maneuvers, on the basis of calculation results for the case of a vehicle with a maximum L/D ratio of 2.3. Entries from a highly elliptical Martian orbit at 5 km/sec are more difficult than those from a lower altitude and speed orbit at 3.5 km/sec, due to their more ...
MICHAEL TAUBER, JEFFREY BOWLES, LILY YANG   +2 more
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