This title discusses recent astronomical observations of molecules in various regions and eras of the Universe, and on describing the processes that determine the chemistry.

Faraday Discussions 133 This volume focuses on recent astronomical observations of molecules in various regions and eras of the Universe, and on describing the processes that determine the chemistry. These processes include gas phase neutral exchanges and ion-molecule reactions, surface reactions on dust grains and the radiative processing of dirty ices. Work is presented in the following areas: Chemistry in the early Universe and in high redshift galaxies? The role of chemistry in star-forming regions Circumstellar disks and planet formation Astrochemistry as the initiator of astrobiology Chemistry of comets and asteroids Diffuse clouds and diffuse interstellar bands