April 22nd, 2020 • 1 hr 1 min • Download (56.2 MB) • Link with Timestamp
Dr. Pekka Janhunen is a researcher with the Finnish Meteorological Institute and the inventor of the Electric Solar Wind Sail concept, using the solar wind as a propulsion system for spacecraft.
These could allow spacecraft to explore many regions of the Solar System without any onboard propellant at all.