1. John D. Hadjidemetriou 49 years of scientific activity and counting...

2. 1959 - MSc in Mathematics

3. 1973 - Already professor of Theoretical Mechanics

4. 1982 - Organizer of the IAU Symposium in Chalkidiki

5. 1984 - Ramsau

6. 1987 - Cortina

7. 1990 - Cortina

8. 1992 - Val André

9. 1993 - Cortina

10. Cortina

11. 1995 - IAU Symposium, Paris

12. 1996 - HCM meeting, Armagh

14. 1996 - Ramsau

15. 1998 - IAU Colloquium, Namur

16. 2004 - Bad Hofgastein

17. 2004 - Bad Hofgastein Three generations of astronomers

18. 2004 - Beograd

19. 2005 - in Athens airport, returning from Namur's meeting

20. 2006 - new year's cake of the group

21. 2007 - Spoleto

22. 2007 - Academy of Athens

23. 2008- Bad Hofgastein

24. 2008 - Litohoro

25. We love you, John