"The slow zone, based on the sensor data we're able to get, is approximately one million kilometers across." Holden pointed at the 3D representation on the screen behind him. "There are no visible stars, so the location of the zone is impossible to determine. The boundary is made up of one thousand three hundred and seventy-three individual rings evenly spaced into a sphere. So far, the only one we've been able to find that's 'open' is the one we came through. The fleets we traveled out with are still visible on the other side, though the Ring seems to distort visual and sensor data, making readings through it unreliable."