I have 2 questions:
What atack and defence strength of planet drones?
Do I miss asteroids and rebel fleets in intermediate galaxies if I travel with speed more than 1
Planet drones have the same attack and defense as the player, ports as well.
For asteroids and rebel fleets, these aren't dependent on the galaxy you are in. If you are wanting to farm drones then I would recommend just travelling one galaxy at a time but if you are trying to head to a nearby or faraway port then moving multiple galaxies at once would be the best option.