Sylshessa (planet)

Sylshessa was a Federation planet, a class M world located near in the galaxy's Beta Quadrant. In the 24th century, Sylshessa was the site of a Tellarite colony. 

History
In 2372, Kira Nerys wanted to name the planet Cha'Xirrac "Sylshessa", after the apocalyptic connection was brought up by the USS Defiant (prototype) crew, who favored the name "Armageddon" from Human mythology. Kira was overruled by Jadzia Dax because there was already the Tellarite colony on planet Sylshessa.