The Star Wars franchise depicts the adventures of characters "A long time ago in a galaxy far, far away", in which humans and many species of aliens (often humanoid) co-exist with robots, or 'droids', who may assist them in their daily routines; space travel between planets is common due to lightspeed hyperspace technology. Spacecraft range from small starfighters, to huge capital ships such as the Star Destroyers, to space stations such as the moon-sized Death Stars. Telecommunication includes two-way audio and audiovisual screens, and holographic projections.
A mystical power known as the Force is described in the original film as "an energy field created by all living things ... [that] binds the galaxy together". Through training and meditation, those whom "the Force is strong with" are able to perform various superpowers, such as — telekinesis, precognition, telepathy, and manipulation of physical energy.
The Force is wielded by two major knightly orders at conflict with each other: the Jedi, peacekeepers of the Galactic Republic who act on the light side of the Force through non-attachment and arbitration, and the Sith, who use the dark side by manipulating fear and aggression. While Jedi Knights can be numerous, the Dark Lords of the Sith (or 'Darths') are intended to be limited to two: a master and their apprentice. There is also a minority faction of Force users, known as Gray Jedi, who walked the line between the light and dark sides of the Force, without surrendering to the dark side.