1. The problem statement, all variables and given/known data From our perspective a spaceship is traveling towards a black hole 9 light minutes away at 0.995C, another spaceship is traveling towards the black hole, traveling at a -0.03c from the point of view of the first spaceship. is it possible for the first spaceship to stop the second going into the black hole? 2. Relevant equations t'=γ(t-(v/(c^2))) x'=γ(x-Vt) I think... 3. The attempt at a solution As I don't know the position of the second spaceship, i spent an hour trying to figure various speeds/distances from both points of view, but ended up not getting anywhere.