Scientific Organizing Committee: Paul Barr (ESA), John Barrow (Sussex), Alexander Boksenberg (Cambridge), Peter Brand (Edinburgh), Giuseppina Fabbiano (Harvard-Smithsonian), Gerald Fishman (NASA), Riccardo Giacconi (ESO), Jean Heyvaerts (Strasbourg), Teresa Lago (Porto), Anthony Lasenby (Cambridge), Paulo Macedo (Porto), Françoise Praderie (Paris), Eric Priest (St.Andrews), Martin Rees (Cambridge), Ian Roxburgh (London), Robert Williams (STScI, Baltimore)

Local Organizing Committee: Pedro Augusto, Pedro Avelino, Jorge Carvalho, Amadeu Fernandes, Jorge Gameiro, João Lima, Mário Monteiro, António Pedrosa