Project Icarus is a 21st century theoretical study of a mission to another star. Icarus aims to build on the work of the celebrated Daedalus project. Between the period 1973-1978 members of the BIS undertook a theoretical study of a flyby mission to Barnard’s star 5.9 light years away. This was Project Daedalus and remains one of the most complete studies of an interstellar probe to date. The 54,000 ton two-stage vehicle was powered by inertial confinement fusion using electron beams to compress the D/He3 fusion capsules to ignition. It would obtain an eventual cruise velocity of 36,000km/s or 12% of light speed from over 700kN of thrust, burning at a specific impulse of 1 million seconds, reaching its destination in approximately 50 years.