[Fyron]

You might want to have the planet creation ship move a sector away, then back before creating the planet.

Unfortunately, I do not think simultaneous movement games let you issue the create planet order unless your ship is orbiting an asteroid. If there are two asteroids in the system, have the planet creator always end its turn on a nearby asteroid. Have the planet destroyer orbiting the world you are trying to optimize. Order it to destroy planet. Order the planet creator to move to that sector, create planet, then move back to the asteroid it started on. Works best if you have quantum reactors or a lot of solar sails, since you will be using a ton of supplies...