The wormhole drive creates an artificial wormhole similar to that used by the Stargates, but with the exception that the wormhole does not require objects at either end for power or navigation, but rather the wormhole is sustained by the ship travelling through it. Because the ship using the drive—namely Atlantis—is shielded from the vacuum inside the wormhole, there is no need for a deconstruction/reconstruction interface at either end. This drive allows the vessel to travel between or throughout galaxies almost instantaneously. However, the technology was abandoned by the Ancients due to its instability, the astronomical power requirements, and the complexity of the calculations (which if off by even a fraction would instantly vaporize the vessel using the drive). Radek Zelenka was able