of the symposium in honor of the 80th birthday of prof. Henk van de Hulst.

Location: Gorlaeus Laboratory, room 2.
9:30 - 10 a.m.Arrival of participants and coffee.
10 - 12 a.m. Morning session:
Hovenier: "Light scattering by small particles. Where are we?"
Ivanov: "Unique radiative transfer art of Henk van de Hulst."
Spiegel: "Vortices on disks."
2 - 4.3 0 p.m.Afternoon session:
De Zeeuw: "Dynamics of Galaxies."
Machetto: "HST/FOC impact on our understanding of AGNs."
Bleeker: "Henk van de Hulst: helmsman in space."
5 p.m.Reception.