Icarus Interstellar is an interstellar advocacy group and interstellar spaceflight company. Icarus Interstellar formed as a spin-off group by several researchers and scientists working on Project Icarus (Interstellar Probe Design Study), a theoretical effort to conceive of and build a spaceship capable of crossing interstellar distances (ie a starship). Organizationally, Icarus is a 501c3 non-profit registered in Alaska, March 2011.