Spiers Memorial Lecture. The chemistry of astronomical environments

Abstract

Beginning with the chemistry of the early Universe, a review is presented of the chemistry of astronomical environments beyond the solar system with a particular emphasis on the interstellar medium. The ion–molecule chemistry of a quiescent interstellar cloud is summarized and modifications arising from intense radiation fields and shocks associated with star formation are discussed. The influence of grain chemistry is noted. The formation of molecules in the ejecta of Supernova 1987A is described. The fundamental role of chemistry in stellar and galactic formation and evolution is emphasized.