The first ring device was discovered in its own extremely high orbit around the brown dwarf binary Luhman 16, a mere 6.5 light years from the green hills of Earth. As an artifact, the device was impressive: fully a kilometer in diameter, and half that in transverse thickness, yet with a wall thin enough to squeeze between your fingers. From a distance, it looked, for all the worlds, like a rolled up piece of paper.
The discovering ship, U.F.P Vega, relayed news of the discovery to the recently established outpost on Luhman system’s one habitable planet, then cautiously sent a probe into the device’s aperture.
U.F.P. Vega was never heard from again.