Yoko Tsuno, Vol. 11: The Three Suns of Vinea

One night, on an isolated moor, Yoko, Vic and Pol are eagerly waiting for their friend Khany. When she arrives, she whisks them away on a shuttle and takes them not to one of the Vineans' underground facilities, but to a station near Saturn. And that's only the first leg of their journey! They're soon invited to travel much, much further: the Vineans have decided to return to their planet, to see if it survived the cataclysm that drove them into exile.