The homeworld of the Bynars in the Beta Magellan system, a planet run by a master computer that was shut down and then restored in 2364 after a nearby supernova.
Bynaus is the home planet of the Bynars, who live and work in linked pairs and are bound so closely to their world's central computer that they cannot survive without it. The planet orbits the star Beta Magellan and is visited in the first-season Next Generation episode 11001001.
In 2364 the Bynars learn that a star in their system is about to go nova and that its electromagnetic pulse will knock out their computer. They need somewhere to store its contents during the shutdown, and only a Galaxy-class ship's memory is large enough. Fearing a refusal, they steal the Enterprise-D from Starbase 74 instead of asking.
Picard and Riker reach Bynaus to find the pair aboard close to death. Working from the Bynars' file, they send the data back to the planet and reactivate the computer, reviving its people.