Avatar is a movie by James Cameron set on the fictional moon Pandora of a gas giant in the Alpha Centauri system. A fleet of 12 Interstellar Vehicles (ISVs), represented by the ISV Venture Star in the movie, provide commercial space transport between Earth and Pandora. These vehicles use laser-pushed photon sails to accelerate away from Earth, and to stop when returning. They use hybrid fusion-antimatter engines to stop at Pandora and accelerate back to Earth. These details were developed in the background material, and not mentioned in the film.