| 1929-1955 | Basel, Switzerland: Elementary school in Riehen, Gymnasium in Basel |
| 1948-1955 | University of Basel: Experimental and theoretical physics, mathematics and chemistry; PhD thesis in vacuum ultraviolet spectroscopy of diatomic molecules. |
| 1955-1957 | Ottawa, Ontario: Research in molecular spectroscopy at the National Research Council of Canada (with D.A. Ramsay: analysis of spectra of NH2 und ND2). |
| 1956 | marriage with Susanne Huber |
| 1957 | birth of twin boys |
| 1957-1959 | Washington, D.C.: Research in vacuum ultraviolet spectroscopy of low-temperature molecular solids at the U.S. National Bureau of Standards (Free Radicals Research Program). |
| 1959-1968 | Princeton, New Jersey: Research and teaching in atomic, molecular and astrophysics at the Princeton University Observatory. Teamwork in space astronomy towards design and construction of the "Copernicus" Orbiting Astronomical Observatory for far uv spectroscopy of the interstellar gas (launched in 1972) and laboratory astrophysics (measurements of absolute oscillator strengths in atomic and molecular spectra). |
| 1960 | birth of third son |
| 1968 | move from Princeton N.J. to Binz/Maur, Canton of Zurich, Switzerland |
| 1968-1994 | Professorship for Molecular Spectroscopy at the Swiss Federal Institute of Technology (ETH) in Zurich. Teaching and research in molecular quantum physics LPC brochure. |
| 1977-1994 | Vice Rector of ETH
(Dean of postgraduate and doctoral programs). Representative of ETH in the Council for the Zurich University for Seniors and in the Council for programs of the Zurich Reformed Church at Zurich University and at ETH |
| 1988-1994 | chairman of the Council für Interdisciplinary lecture series at Zurich University and at ETH. |