It was a lighthouse.
Astra Kael, the last remaining archivist, hadn’t spoken to another human in 400 days. The evacuation order had come in 2323, right before the quantum comms collapsed. "Solar system closed. Outer colonies abandoned." -PUSATFILM21.INFO-uranus-2324-2024-...
Incoming. Unidentified object. Trajectory: originating from beneath Uranus's cloud tops. It was a lighthouse
Until today.