Fantastic Four #19

The Fantastic Four have built a new kind of telescope for their children, able to peer deeper into the unexplored depths of the universe... and have found something unexpected. It's not a biosignature, but a technosignature: solar engineering that could only be done by an incredibly advanced civilization. It's an invitation — one that they take... but soon discover that the society that sent it is long gone — and those that destroyed them may still remain! It's the Fantastic Four — and their children — facing cryptic messages on the other side of the universe... all alone against a force they cannot defeat!