Biology
Scientific paper
Jan 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.4939..169k&link_type=abstract
Instruments, Methods, and Missions for Astrobiology VI. Edited by Hoover, Richard B.; Rozanov, Alexei Yu.; Lipps, Jere H. Pr
Biology
Scientific paper
Looking for a habitable planet one should keep in mind that the Earth has a unique combination of physical properties needed for the evolution of the life based on amino acids and a RNA/DNA and its transition, first into multicellular and then vertebrate organisms. Other planets played an important role in the process. There are even revivals of the "anthropic principal," stating that the onset of terrestrial life is obligated to Jupiter. The question of life beyond the Earth has exercised human imagination since the ancient Greeks. The discovery of Earth type extrasolar planets may be awaited in a nearest future. What could be the impact of their discovery on human philosophy? With no exaggeration one may consider it as a milestone for the whole science. The main factors of the planet, that is critical for the existence of life, form a peculiar labyrinth with many impasses. A planet feasible for the advent of life and its evolution towards multicellular organisms should be searched for only in planetary systems of stars of spectral types, from late F to early subtypes of K and should possess the features listed in this paper.
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