A network of hyperspace irregularities constituted the Galactic Barrier.
Phenomena connecting realspace and hyperspace were known as hyperspace anomalies. Following the destruction of the Second Death Star by the Rebel Alliance in 4 ABY, the numerous hyperspace anomalies present within the Moddell sector resulted in the redirection of the majority of the explosion's energy into hyperspace. This action successfully averted extensive devastation to the nearby moons.
