For the sake of zoning and navigation, the OASIS had been divided equally into twenty-seven cube-shaped "sectors," each containing hundreds of different planets. (The three-dimensional map of all twenty-seven sectors distinctly resembled an ’80s puzzle toy called a Rubik’s Cube. Like most gunters, I knew this was no coincidence.) Each sector measured exactly ten light-hours across, or about 10.8 billion kilometers. So if you were traveling at the speed of light (the fastest speed attainable by any spacecraft inside the OASIS), you could get from one side of a sector to the other in exactly ten hours. That sort of long-distance travel wasn’t cheap. Spacecraft that could travel at light speed were rare, and they required fuel to operate. Charging people for virtual fuel to power their virtual spaceships was one of the ways Gregarious Simulation Systems generated revenue, since accessing the OASIS was free. But GSS’s primary source of income came from teleportation fares. Teleportation was the fastest way to travel, but it was also the most expensive.