Abstract:
The following topics are covered: producing chondrules; carbons, CAI's, and chondrules; large scale processes in the solar nebula; chondrule-matrix relationships in chondritic meteorites; overview of nebula models; constraints placed on the nature of chondrule precursors; turbulent diffusion and concentration of chondrules in the protoplanetary nebula; heating and cooling in the solar nebula; crystallization trends of precursor pyroxene in ordinary chondrites; precipitation induced vertical lightning in the protoplanetary nebula; the role of chondrules in nebular fractionations of volatiles and other elements; astronomical observations of phenomena in disks; experimental constraints on models for origins of chondrules, and other topics.