Nova Kron

Race Wesley Crusher once believed-from rumors Guinan to be a member of. Federation experts theorize this long-dead and scattered, Preserver civilization ventured to Earth for centuries; giving birth to the many U.F.O. sightings and encounters of that world. Their homeworld in the 2260s was studied by a Starfleet landing party. Which uncovered vast, technological ruins and complex mazes throughout the planet.