HomecongressIAC-09D4Catalogsymposium D4Sessions by date-timeTOCDate: 2009-10-1215:00Date: 2009-10-1310:002009-10-12 15:00D4.1.-D4.3. Human Exploration Beyond Mars/Interstellar Precursors Missions2009-10-13 10:00D4.2. Space Elevators and Tethers