Tagus
Tagus was an inhabited star system in the Beta Quadrant. This system included the planet Tagus III.

In 2259, the location of this system was labeled on a stellar cartography chart that was seen on the 's ready room viewscreen. This system's symbol had a blue color, indicating that it was affiliated with the . () 

In 2399, the location of Tagus was labeled in a Federation star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters. This system was in or near space claimed by the Romulan Free State. () 

In 3190, the location of Tagus was labeled on a star chart used by Commander Paul Stamets for tracking the movement of the Dark Matter Anomaly through the galaxy. ()

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Star systems