Valo system
The Valo system was an inhabited planetary system in the Alpha Quadrant. It was located on the outskirts of Cardassian territory.

In the mid-24th century, many Bajoran refugees fled to this system during the Occupation of Bajor. The system had three M-class planets, all containing Bajoran settlements. These planets were designated as Valo I, Valo II, and Valo III. There was also a Bajoran settlement on the third moon of Valo I. 

The  entered the system in 2368 to investigate a possible terrorist threat from resistance leader Orta to the Federation. ()

Appendices

Background information 
This system's quadrant of origin is inferred based on the position of the Cardassian Union in the star chart appearing in the  episode .

According to the script, the pronunciation for Valo was "VAH-lo". 

According to Star Trek: Star Charts (p. 47) and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), the primary of the Valo system was a G-class star. In the late 24th century, it was an independent system.

According to StarTrek.com, the primary was named Valo.

External link 
 

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Star systems