I know what happened to make the ponies fear us. And Celestia too… She probably hadn’t been most afraid of monsters that killed or kidnapped. Lucky knew from her year’s education there that the nation had plenty of both. Celestia heard stories of the ship and knew what it must mean. She probably thought it came from another part of the ring. The princess must not have total knowledge of Sanctuary, or else she would have been able to find Landfall and destroy it. Its initial solar arrays were not concealed, even if the hanger was. Yet Celestia had failed to find them.