Rhaenos is the main planet in Rule of the Kestrels where most of the action takes place. It is the only known inhabited planet in the Solar System. Rhaenos is quite advanced, rife with technology that woukd be considered futuristic. 11 Billion people inhabit the planet, and it is ruled over by several states of government, the largest of which is The Third Great Empire of Raxos. It is the twin planet of Derion.