Kline Station was a self-governing space station whose nearby space included six useful wormholes, one of which led to Athos. It was 300 years old at the time of Ethan of Athos, taking a slow orbit around a dark star. It had approximately 100 thousand citizens, and at any given time, there were typically 20 thousand transients. The oldest parts of Kline station still used turning wheels at that time to produce centrifugal gravity, but these were gradually being recycled for other purposes.