Presentation of Professor James A. Van Allen as the Crafoord Prize Laureate of 1989 at the Royal Swedish Academy of Sciences September 27 1989. - Active Experiments in Magnetospheric Physics. - Achievements of Magnetospheric Research. - The Encounter of Voyager 2 with Neptune's Magnetosphere. - International Cooperation in Magnetospheric Physics. - The Need for High Time Resolution Measurements in the Magnetosphere. - Why We Need Global Observations. - Role of Small Satellite Missions in Magnetospheric Research. - Why Do We Need Ground Based Balloon and Sounding Rocket Measurements in the Future?. - Large-Scale Organization of Solar System Plasmas. - The Role of Plasma Theory in Space Research. - Role of Simulations in Future Magnetospheric Programs. - List of Participants in the Crafoord Symposium. Language: English