Wherever the body of Stardust eventually travels, it's unlikely to return to Earth in the near future. Larson assured: "When we take into account all the possibilities for how long the burn could be and then the possible post-burn trajectories, we project that over the next 100 years, Stardust will not get any closer than 1.7 million miles of Earth's orbit, or within 13 million miles of Mars orbit.