The Astrophysical Context of Life (2005) / Chapter Skim
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Appendix A: Context and Statement of Task
Appendix A: Context and Statement of Task
Pages 57-61
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Appendixes
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Technical Life on Earth originated and has evolved over the last 3.5 billion plus years in a complex and highly variable astronomical environment. The Earth was assembled from interstellar gas already enriched in prebiotic molecules that were themselves the product of generations of stellar nucleosynthesis and chemical evolution in interstellar clouds.
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The latter concerns issues of the level of heavy elements required to support the growth of terrestrial planets and the degree to which galactic commotion is inimical to life. STATEMENT OF TASK The committee will study the means to augment and integrate the activity of astronomy and astrophysics in the intellectual enterprise of astrobiology, in NASA's Astrobiology program, and relevant programs in other federal agencies.
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-- To what degree and under what conditions is chiral asymmetry, and possibly homochirality, induced by radiation? -- What is the evolutionary origin of radiation repair mechanisms and what commonality is there between these mechanisms, gene transfer, and meiois, all of which involve annealing strands of DNA?
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