1. The problem statement, all variables and given/known data A rocket flies between two planets that are one light-year apart. What should the rocket’s speed be so that the time elapsed on the captain’s watch is one year? 2. Relevant equations I have v = d'/t' d'=d/ϒ t'=1 year d=1 light year 3. The attempt at a solution Will the equations I use vϒ=d/t' but I get complex roots as an answer. What am I doing wrong?