The Young Sun, Conditions on the Early Earth, and the Origin of Life

Abstract The article analyzes the existing theoretical models of the formation of the solar system and the early physical conditions on Earth from the point of view of the possibility for the development of life in its present form. We show that the origin of the biosphere and geomagnetic field was determined not only by the conditions on the Earth itself but also by the dynamics of the early Sun, the migration of giant planets, and the formation of the Earth–Moon system. Also considered are the possibilities for the search for bacterial life beyond the Earth: on Mars, on satellites of Giant planets, on the outer asteroid belt, and on exoplanets.