Results 251 to 260 of about 725,463 (303)

3 months transit time to Mars for human missions using SpaceX Starship. [PDF]

Sci Rep
Kingdon J.
europepmc   +1 more source

Highly enriched carbon and oxygen isotopes in carbonate-derived CO₂ at Gale crater, Mars. [PDF]

Proc Natl Acad Sci U S A
Burtt DG, Stern JC, Webster CR, Hofmann AE, Franz HB, Sutter B, Thorpe MT, Kite ES, Eigenbrode JL, Pavlov AA, House CH, Tutolo BM, Des Marais DJ, Rampe EB, McAdam AC, Malespin CA.   +15 more
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Saltation in terrestrial and Martian atmospheres

, 2018
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Immune responses to human pathogens exposed to simulated Mars conditions

Zaccaria T, Bulut Ö, Ferreira AV, Dona M, Langereis JD, Mesman RJ, Wesseling J, van Niftrik L, Netea MG, Rettberg P, Beblo-Vranesevic K, de Jonge MI, Domínguez-Andrés J.   +12 more
europepmc   +1 more source

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A Photochemical Model of the Martian Atmosphere

Icarus, 1994
The factors governing the amounts of CO, O2, and O3 in the martian atmosphere are investigated using a minimally constrained, one-dimensional photochemical model. We find that the incorporation of temperature-dependent CO2 absorption cross sections leads to an enhancement in the water photolysis rate, increasing the abundance of OH radicals to the ...
Nair, Hari, Allen, Mark, Anbar, Ariel D., Yung, Yuk L., Clancy, R. Todd   +4 more
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Helium in the Martian atmosphere

Journal of Geophysical Research: Planets, 1993
A simple two‐reservoir degassing model for the Earth decribes rather well the current degassing rate of 4He which is equal to (3±1)×106 cm −2s−1 according to data for the helium polar wind and the measured 3He/4He ratio. This value of the helium degassing and loss rate provides an important constraint in modeling of noble gases, and some recent models ...
Supriya Chakrabarti, G. Randall Gladstone, Vladimir A. Krasnopolsky   +2 more
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Photochemistry of HCl in the martian atmosphere

Icarus, 2022
The recent discovery of HCl on Mars (Korablev et al. 2021, Olsen et al. 2021) indicates its strong seasonal variations and correlation with dust. To study this idea, we develop photochemical models for summer midlatitudes at aphelion and perihelion. We assume that HCl is formed in heterogeneous reactions of FeCl3 and/or NaCl in the dust with H, and the
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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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