A'lau'chia had his ship outfitted with a second set of Vortex Rockets for this mission. While they could be used to return the Roc-du-Plune into the Gravitron Slingshot effect, the effort would be nearly suicidal without a pre-plotted course. And, without a third set of Vortex Rockets, there would be no way to stop, except by applying full reverse force from the engines. (Which would take over nineteen months to initiate a full stop, leaving them located in 'No Man's Land'...and most likely dead from lack of consumable supplies.) Perhaps, they would be extremely lucky and stop in a system that had an established Gravitron Ring. But, those odds were one-in-a-trillion, at least. All the options given to the captain seemed like they had slim success odds, at best. Perhaps, Ron really could operate the shields and block all the missile's effects. Yea, right. And, maybe it was possible to remove a sun without effecting all the planets around it.