Unknown Vessels

The vessels detected in the … system appear to be on some kind of expedition across the galaxy, a way of life our own people know well. They have made no hostile moves, broadcasting repetitive signals in our direction instead. There is something almost familiar about the sight of a people making their home among the stars rather than on any world. Our …, …, is eager to learn more about these fellow travelers.

The command below will trigger the "Unknown Vessels" event in Stellaris:

When this event fires, you can choose between these 2 options:

• Curious.
• Have they already claimed this region's Wayline routes?