Research File: Manned vs. unmanned space missions – Wrong Audio

Piet Smolders


  • Dr. Piet Smolders: Dutch space expert and former director of the Artis Planetarium, Amsterdam, Netherlands
  • Artemis Westenberg & Jim Volp: Spokespersons for the Lunar Explorer Society and Mars Society, Netherlands
  • Dr. Marco de Vries: LOFAR Project, Westerbork, Netherlands
  • Dr. Louis Freedman: American Space Expert, Planetary Society, Solar Sailing Project ‘Cosmos 1’ USA