The Young Sun, The Early Earth and the Photochemistry of Oxygen, Ozone and Formaldehyde in the Early Atmosphere

摘要: Publisher Summary This chapter discusses the mass and evolution of solar nebula. By assuming that nebula had a composition, lower limit for its M N can be obtained. Because value is significantly than required gravitational instability, found to gravitationally stable. In prebiological early atmosphere, photolysis water vapor carbon dioxide led photochemical production three biologically significant species: molecular oxygen, ozone, formaldehyde. The theoretical predictions solar-like protostar in Hertzsprung–Russell diagram presents models used predict few observational quantities such as surface temperature luminosity evolving protostar.