Results 271 to 280 of about 149,853 (313)
Origins of life and evolution of the biosphere, 1993 Although the Viking results may indicate that Mars has no life today, the possibility exists that Mars may hold the best record of the events that led to the origin of life. There is direct geomorphological evidence that in the past Mars had large amounts of liquid water on its surface.
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Mars exploration advances: Missions to Mars - Mars base
30th Aerospace Sciences Meeting and Exhibit, 1992An overview is presented of Mars missions and related planning with attention given to four mission architectures in the light of significant limitations. Planned unpiloted missions are discussed including the Mars Orbital Mapping Mission, the Mars Rover Sample Return, the Mars Aeronomy Orbiter, and the Mars Environmental Survey.
Fred R. Dejarnette, Christopher P. Mckay
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Science, 1967
The article which Bond's committee objects to is an examination of the basic assumptions of the current spacecraft sterilization policy in the light of new knowledge of the planet Mars. It shows that the validity of these assumptions is, at the very least, questionable.
Frank B. Engley +8 more
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The article which Bond's committee objects to is an examination of the basic assumptions of the current spacecraft sterilization policy in the light of new knowledge of the planet Mars. It shows that the validity of these assumptions is, at the very least, questionable.
Frank B. Engley +8 more
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Scientific American, 2011
In this article the authors discuss how the adaptation of ideas from robotic planetary exploration would enable astronauts, as part of the U.S. National Aeronautics & Space Administration’s (NASA’s) human space program, to travel to asteroids and the planet Mars cheaply and quickly.
Nathan Strange, Damon Landau
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In this article the authors discuss how the adaptation of ideas from robotic planetary exploration would enable astronauts, as part of the U.S. National Aeronautics & Space Administration’s (NASA’s) human space program, to travel to asteroids and the planet Mars cheaply and quickly.
Nathan Strange, Damon Landau
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Astrobiology, 2010
Organics are expected to exist on Mars based on meteorite infall, in situ production, and any possible biological sources. Yet they have not been detected on the martian surface; are they there, or are we not capable enough to detect them? The Viking gas chromatograph-mass spectrometer did not detect organics in the headspace of heated soil samples ...
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Organics are expected to exist on Mars based on meteorite infall, in situ production, and any possible biological sources. Yet they have not been detected on the martian surface; are they there, or are we not capable enough to detect them? The Viking gas chromatograph-mass spectrometer did not detect organics in the headspace of heated soil samples ...
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Mars X: A Mars Mission Architecture with Lunar-Mars Synergy
AIP Conference Proceedings, 2006A human mission to Mars, if it is to be cost effective, should take maximum advantage of previous efforts at the Moon, in terms of habitats, heavy lift boosters, and vehicles. It must also make use of nuclear site power for bases. However, to make such an effort sustainable over many administrations, it should not make use of nuclear propulsion.
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Applied Optics, 1969
A summary of results of observations of the polarization of Mars shows that surface pressure determinations from these data have not yielded satisfactory results in spite of the extensive number of observations available. It is suggested that the difficulty lies mainly in the neglect of radiative components resulting from a combination of diffuse ...
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A summary of results of observations of the polarization of Mars shows that surface pressure determinations from these data have not yielded satisfactory results in spite of the extensive number of observations available. It is suggested that the difficulty lies mainly in the neglect of radiative components resulting from a combination of diffuse ...
openaire +3 more sources