The prevalence of earthlike planets

Details The prevalence of earthlike planets The prevalence of earthlike planets

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979amsci..67..653p&link_type=abstract

American Scientist, vol. 67, Nov.-Dec. 1979, p. 653-659.

Biology

3

Planets, Exobiology, Meteorites, Composition, Chemistry, Water, Amino Acids, Hydrospheres, Chronology, Stars, Temperatures, Luminescence, Radiation, Evolution, Abundances, Orbits, Gravity, Mass, Extrasolar Planets

Scientific paper

The number of stars in the universe which might have a planet capable of a prolonged evolutionary history of living organisms is estimated to be between one out of 100,000 to 10,000,000. The planet itself needs large masses of land and of water, which must contain an adequate supply of phosphoric acid, purines, pyrimidines, amino acids, and simple sugars and at least 3 to 4 billion years to evolve biologically. Other considerations include its mean orbital radius, rotational velocity, and tidal effects. The necessary conditions for the host star include its lifetime on the main sequence, luminosity and spectral characteristics, mass and chemical composition, and the fact that it must be a single star (not part of a binary system). A priori calculation of the development of hominids on such a planet, however, is not considered possible.

Affiliated with

Also associated with

No associations

Rating

The prevalence of earthlike planets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The prevalence of earthlike planets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The prevalence of earthlike planets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1442618