Seeker by Jack McDevitt

With Polaris, multiple Nebula Award-nominee Jack McDevitt reacquainted readers with Alex Benedict, his hero from A Talent for War. Alex and his assistant, Chase Kolpath, return to investigate the provenance of the cup. Alex and Chase follow a deadly trail to the Seeker - strangely adrift in a system barren of habitable worlds. But their discovery raises more questions than it answers, drawing Alex and Chase into the very heart of danger.