"Biospheric index", a contribution to the problem of determination of the existence of extra-solar planetary biosphere
- Paper ID
IAF-57-06
- author
- company
Sociedade interplanetaria brasileira
- country
Brazil
- year
1957
- abstract
The comparative examination of the different regions of the “Solar Eco- sphere” [1] allows the classification of the planets of the Solar System in three groups, as concerns the presence of life: 1) Biosphere improbable (Mercury, Moon, Pluto); 2) Possibility of formation of a biosphere (Giant planets); 3) Biosphere probable (Venus, Earth, Mars). The distinction of these three groups corresponds to the distinction among three types of planetary atmospheres: 1) No or insufficient atmosphere; 2) Gases as NH3 and CH4 where proteic molecules might be formed under the action of radiation as proved by experimental evidence [2]; 3) Atmospheres chemically adequate for subsistance of organisms maintaining a metabolism.