Delos system
From Memory Alpha, the free Star Trek reference
The Delos system is a non-aligned inhabited star system, home to the twin civilizations of the Ornarans and the Brekkians.
In 2164, a Federation scout conducted a reconnaissance of the star system and reported its findings to Starfleet Command. Two centuries later in 2364, the starship USS Enterprise-D visited the system to chart the solar activity of the star Delos. (TNG: "Symbiosis")
