Quadrants
- Large-scale general galactic division of space
- Defined via two radial planes intersecting cylinder circumscribing the galaxy
- First plane intersects Sol, second plane perpendicular to first
- Spinward from Sol, quadrants are named as Alpha, Gamma, Delta, Beta
- Alpha Quadrant
- Spinward quadrant to Sol
- Major known interstellar powers
- c.19th century - Present: Cardassian Union
- - 2151 - Present: Tholian Assembly
- - 2155 - Present: Breen Confederacy
- 2161 - Present: United Federation of Planets
- Beta Quadrant
- Antispinward quadrant to Sol
- Major known interstellar powers
- c.4th century - Present: Romulan Star Empire
- c.14th century - Present: Klingon Empire
- Gamma Quadrant
- Spinward quadrant to Alpha Quadrant
- Major known interstellar powers
- c.4th century - Present: Dominion
- Delta Quadrant
- Antispinward quadrant to Beta Quadrant
- Major known interstellar powers
- c.75th millennium BCE - Present: Voth
- c.45th century BCE - 2381: Borg Collective