Solar Hydrologic Cycle Determines Earth and Venus Atmospheres Mass and Composition.

Earth's and Venus' atmosphere mass and composition today are accumulated results of the solar hydrologic cycle over billions of years with comet collisions infusing gassy material onto the planets and solar wind blowing away the lighter gasses leaving primarily only carbon dioxide and nitrogen on both Earth and Venus. The comets entering the inner solar system have higher evaporation rate than collision probability, resulting in far less mass infusion onto inner planets than outer planets. The infused gasses onto the Earth are further processed by its chemical processes. Being too close to the Sun to have liquid water, Venus lacks chemical processes. The solar hydrologic cycle theory predicts comet mass infusion ratio between Venus and Earth to be 1:0.76. Comparing carbon dioxide and nitrogen mass in Venus atmosphere with nitrogen mass in Earth atmosphere plus carbon and nitrogen deposits in the crust, the ratio is 1:0.45-0.54. [ABSTRACT FROM AUTHOR]