 The added weight of the reactor reduced performance somewhat, but even using LiD fuel it would be able to reach Alpha Centauri, the closest solar system to our own, in 100 years (approx.velocity of 13,411 km/s, at a distance of 4.5 light years - equivalent to 4.5% of light speed).In the mid-1990s research at the Pennsylvania State University led to the concept of using antimatter to catalyze nuclear reactions.