1. Biography 2. Leiden Observatory 3. Leiden University 4. The Netherlands 5. Galactic rotation 6. Comets 7. Crab Nebula 8. International contacts 9. Mens sana...
18. J.H. Oort lecturing , probably at a Dutch Astronomers’ Conference (c. 1956)
19. Official opening in 1956 of the 25-m Dwingeloo Telescope by H.M. Queen Juliana, J.H. Oort explaining. Photograph by C. de Boer
20. J.H. Oort being interviewed in 1978 for a TV programme, at the Westerbork Telescope (opened in 1970). Photograph NOS.