Boreskov

OP‐5STAGES OF CHEMICAL EVOLUTION IN CIRCUMSOLAR DISKSnytnikov V.Boreskov Institute of Catalysis SB RAS, Novosibirsk State University, Novosibirsk, Russiasnyt@catalysis.ruThe pre‐planetary circumstellar disk as most probable time and place of the primaryabiogenic synthesis of prebiotic organic substances from simple molecules along with the“RNA world” and the life origin. The sequence of self‐organization stages that gave rise tothe Earth biosphere is determined. Results of computational experiments usingsupercomputers are used to determine conditions of abiogenic organic compounds in theEarth biosphere.The stage of the astrocatalysis for the primary abiogenic synthesis of the major mass oforganic compounds corresponds to the stage of the formation of large bodies in the solarsystem. At the stage of the astrocatalysis the abiogenic synthesis of primary organiccompounds occurred directly by the formation of the primary bodies and protoplanetsduring the development of collective gravitational instability with the simultaneousassembly of numerous small bodies.37