Results 171 to 180 of about 2,858 (221)

Exobiological exploration of Mars

Advances in Space Research, 1995
Of all the other planets in the solar system, Mars remains the most promising for further elucidating concepts about chemical evolution and the origin of life. Strategies were developed to pursue three exobiological objectives for Mars exploration: determining the abundance and distribution of the biogenic elements and organic compounds, detecting ...
H P, Klein, D L, DeVincenzi
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Exobiology in earth orbit

Origins of life and evolution of the biosphere, 1986
The published version is located at http://www.archive.org/details ...
Tarter, J., Defrees, D., Brownlee, D., Usher, D., Klein, H.P., Irvine, William M.   +5 more
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NASA's Exobiology Program

Origins of Life, 1984
The goal of NASA's Exobiology Program is to understand the origin, evolution, and distribution of life, and life-related molecules, on Earth and throughout the universe. Emphasis is focused on determining how the rate and direction of these processes were affected by the chemical and physical environment of the evolving planet, as well as by planetary,
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Extreme environments and exobiology

Giornale botanico italiano, 1993
Ecological research on extreme environments can be applied to exobiological problems such as the question of life on Mars. If life forms (fossil or extant) are found on Mars, their study will help to solve fundamental questions about the nature of life on Earth.
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Site selection for Mars exobiology

Advances in Space Research, 1995
The selection of sites on Mars that have a high priority for exobiological research is fundamental for planning future exploration. The most immediate need is to identify targets for high resolution orbital imaging during the Mars Observer and Mars '94/'96 missions that can be used to refine site priorities for surface exploration.
J, Farmer, D, Des Marais, R, Greeley, R, Landheim, H, Klein   +4 more
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Exobiological Investigations on Russian Spacecrafts

Astrobiology, 2003
To investigate the possibility of prebiotic synthesis of organic molecules in open space, conditions involved irradiating nucleosides and inorganic phosphate during five Earth-orbiting Russian space missions that included Salut-7 (13- and 16-month missions), Mir, Bion-11, and Cosmos-2044.
Evgenia A, Kuzicheva, Natalia B, Gontareva   +1 more
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Ultraviolet Radiation and Exobiology

2001
In comparison to the Earth, extraterrestrial environments possess quite different UV radiation regimes, both in terms of absolute flux and in terms of spectral quality (Horneck et al. 1984; Horneck 1993). For example, the moon has no atmosphere and thus its UV regimen is determined solely by the extraterrestrial spectrum.
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Exobiology of Titan

2004
Accretion models of the Saturnian satellite suggest that heating released during late stages of its formation was sufficient to create a warm, dense atmosphere with mass at least 30 times greater then the present value (Lunine and Stevemson, 1983) and large open ocean on its surface.
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Exobiological experiments in Earth orbit

Advances in Space Research, 1998
Abstract The primary goal of exobiological research is to reach a better understanding of the processes leading to the origin, evolution and distribution of life on Earth or elsewhere in the universe. In this endeavour, scientists from a wide variety of disciplines are involved, such as astronomy, planetary research, organic chemistry, palaeontology ...
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Exobiology

Transactions of the American Microscopical Society, 1973
John O. Corliss, C. Ponnamperuma
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