New PDF release: An Astrobiology Strategy for the Exploration of Mars

By National Research Council, Division on Earth and Life Studies, Board on Life Sciences, Division on Engineering and Physical Sciences, Space Studies Board, Committee on an Astrobiology Strategy for the Exploration of Mars

3 contemporary advancements have vastly elevated curiosity within the look for lifestyles on Mars. the 1st is new information regarding the Martian surroundings together with proof of a watery prior and the opportunity of atmospheric methane. the second one is the potential of microbial viability on Mars. ultimately, the imaginative and prescient for house Exploration initiative incorporated an specific directive to look for the facts of existence on Mars. those clinical and political advancements led NASA to request the NRC's assistance in formulating an updated built-in astrobiology process for Mars exploration. between different issues, this document offers a overview of present wisdom approximately attainable lifestyles on Mars; an astrobiological evaluate of present Mars missions; a evaluation of Mars-mission planetary safeguard; and findings and suggestions. The file notes that the best elevate in figuring out of Mars will come from the gathering and go back to Earth of a well-chosen suite of Martian floor fabrics.

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Extra info for An Astrobiology Strategy for the Exploration of Mars

Sample text

This image from the Mars Orbiter Camera on the Mars Global Surveyor spacecraft is courtesy of NASA/JPL/Malin Space Science Systems. 9 km. 4 One environmental factor that is almost universally accepted as necessary for life is at least episodic access to liquid water. This observation has implications for temperature but does not necessarily imply temperatures between 273 K and 373 K. Although there is theoretical evidence that metabolism can continue at temperatures at or below 233 K, there is no evidence of active cells below 253 K and no direct observation of cell replication below 248 K.

Tanaka, and M. Voytek, “Findings of the Mars Special Region Science Analysis Group,” Astrobiology 6(5):677-732, 2006. 36 AN ASTROBIOLOGY STRATEGY FOR THE EXPLORATION OF MARS 6. B. Price and T. 0400522101, 2004. 7. K. R. Lovley, “Extending the Upper Limits of Life,” Science 301:93, 2003. 8. O. S. R. A. Baross, “Incidence and Diversity of Microorganisms Within the Walls of an Active Deep-Sea Sulfide Chimney,” Applied and Environmental Microbiology 69(6):3580-3592, 2003. 9. D. Grant, “Life at Low Water Activity,” Phil.

Kluwer, Dordrecht, the Netherlands, 2001. detected carbonates in the dust, and the martian meteorite ALH 84001 has several percent carbonates by weight, indicating that carbonates are present although the total quantity is unknown. , Valles Marineris) are among the least understood features of the planet. Their relevance to liquid water and biology is that they may have once contained large lakes that ultimately drained catastrophically to the east to form outflow channels that connect to the canyons.

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