rootbrowseIAC-20D4session VPVP. Virtual Presentations - 18th IAA SYMPOSIUM ON VISIONS AND STRATEGIES FOR THE FUTUREPapers1. Long-term mobile and stationary inhabited stations on the surface of Venus.2. light transmission communication system via interstellar3. COMMERCIAL SPACE STATIONS WITH ARTIFICIAL GRAVITATION AS REAL BUSINESS4. A modified time-varying graph routing algorithm based on DTN for space internet5. Results of ZPS Penetrator Tests