title: Alexander Dalgarno: From atomic and molecular physics to astronomy and aeronomy.
authors.affiliation: Leiden Observatory, Leiden University, 2300 RA Leiden, The Netherlands; ewine@strw.leidenuniv.nl.
authors.forename: Ewine F
authors.initials: EF
authors.lastname: van Dishoeck
authors.affiliation: School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom;
authors.forename: Tom
authors.initials: T
authors.lastname: Hartquist
authors.affiliation: School of Physics & Astronomy, Tel Aviv University, Ramat Aviv 69978, Israel.
authors.forename: Amiel
authors.initials: A
authors.lastname: Sternberg