HomecongressIAC-10D4Catalogsymposium D4Sessions by date-timeTOCDate: 2010-09-2715:15Date: 2010-09-2915:15Date: 2010-10-0114:002010-09-27 15:15D4.2. Interstellar Precursor Missions2010-09-29 15:15D4.3. Access to Space in the Far Future2010-10-01 14:00D4.4. Space Elevators and Tethers