Galactic Center for Etymological Research

You are in charge of a ship, and you must discover all planets in each given planetary system. Planets are given by their names, and navigation is done by transposing letters in such names. But you have limited fuel (that is, a limited number of moves), so you must reach a planet and refuel before reaching the next one. Occasionally, your fuel reserves are increased, which allows you to travel to planets further away from the original one in each system.