My first conference badge
- 1980: IAU Coll.56,Reference Coordinate Systems for Earth Dynamics,8-12 September, Warsaw
- 1985: Space dynamics and celestial mechanics, International workshop, Delhi, India, 14-16 November,
- 1986: Potsdam
- ...
- 1990: Nordic-Baltic Astronomy Meeting, Uppsala, Sweden.
- ...
- 1994: Bodies in the Solar System and Their Interactions with the Planets, held in Mariehamn,. Finland, August 8-12,
- 1995: IAU SYMPOSIUM NUMBER 172 Dynamics, Ephemerides and Astrometry of the Solar System, Paris
- 1996: ACM Versailles Photo (8.3 MB)
- ...
- 1999: Tatranska Lomnica Photo (4.5 MB)
- 2000: NATO Adv. Study Inst, Blair Athol
- 2002: IAU Colloquium No. 186: COMETARY SCIENCE AFTER HALE-BOPP Puerto de La Cruz, Tenerife, Spain.
- 2002: ACM Berlin
- 2004: IAU Coll. 197, Belgrade
- 2005: ACM Buzios, Brasil.
- ...
- 2011 Dynamics and formation of the Oort cloud, Lille, France.
- 2014: ACM 2014, Helsinki, Finland
- 2016: International Workshop On Comets In Honor of Hans Rickman Team photo (2.3 MB)
