Past affiliation(s) within the IAU

• Past President of Commission 34 Interstellar Matter (1976-1979)
• Past Vice-President of Commission 34 Interstellar Matter (1973-1976)
• Past Organizing Committee Member of Commission 34 Interstellar Matter (1979-1982)
• Past Member of Division B Facilities, Technologies and Data Science (until 2022)
• Past Member of Division D High Energy Phenomena and Fundamental Physics (until 2022)
• Past Member of Division E Sun and Heliosphere (until 2022)
• Past Member of Division F Planetary Systems and Astrobiology (until 2022)
• Past Member of Division H Interstellar Matter and Local Universe (until 2022)
• Past Member of Division J Galaxies and Cosmology (until 2022)
• Past Member of Commission 28 Galaxies (until 2015)
• Past Member of Commission 34 Interstellar Matter (until 2015)
• Past Member of Commission 40 Radio Astronomy (until 2015)
• Past Member of Commission 44 Space & High Energy Astrophysics (until 2015)
• Past Member of Commission 47 Cosmology (until 2015)
• Past Member of Commission 49 Interplanetary Plasma & Heliosphere (until 2015)
• Past Member of Commission 51 Bio-Astronomy (until 2015)
• Past Member of Division II Sun & Heliosphere (until 2012)
• Past Member of Division III Planetary Systems Sciences (until 2012)
• Past Member of Division VI Interstellar Matter (until 2012)
• Past Member of Division VIII Galaxies & the Universe (until 2012)
• Past Member of Division X Radio Astronomy (until 2012)
• Past Member of Division XI Space & High Energy Astrophysics (until 2012)
• Past Member of Special Nominating Committee (1988-1991)