- For other uses, see AU.
An astronomical unit (most often abbreviated AU) is a distance measurement defined as the average distance of Earth from Sol. The currently accepted value of the AU is 149,597,870,691 ± 30 meters (about 150 million kilometers or 93 million miles).
- TOS movie & novelization: Star Trek: The Motion Picture
- TOS novels: Spock Must Die!, The Final Nexus
- FASA RPG module: The Four Years War