My first attempt to gain a foothold at Jupiter ended when the Ayy's took offence at the first dreadnaught that rolled out of a shipyard.
I still had one Io base sheltering a colony ship and I really wanted some bases on Ganymede for that sweet sweet water and volatile production, the problem being of course the overtly friendly Alien Death ball dispensing free hugs.
I built a ship with ~ 35 dV, good Combat and Cruse acceleration, then launched it into orbit.
The Ayys of course, wanting a cuddle, set a course for it. At which point I gave it a transfer in the opposite direction to Jupiter's Orbit.
The Ayy Fleet had to spend at least 35dV to match velocity, plus additional dV to catchu


