[Baal]

I can make a planet move in simultaneous play. If the planet is owned by me and has one of my ships above it I can select the planet and the ship at the same time and tell them to move somewhere and the planet follows the same orders as the ship.

Simultaneous play troop invasions never invade.

In turn-based play if I select a battleship with 13 movement points/turn and 2 dreadnaughts with 11 movement points/turn then tell them to move somewhere the dreadnaughts keep up with the battleship regardless of running out of movement points.