"Always two there are. No more, no less."

Located in the Ols N'Wot System of the Lahara Sector in the Outer Rim Territories, Zor and Zam are two terrestrial planets, both quite mountainess, that orbit around each other as they orbit around the system's yellow sun together. From space, Zor is a marble of dark brown and light brown, while Zam is seen as more of a reddish-brown all over. No sentient lifeforms inhabit the two planets, but legend has it that the rulers of the planets declared war on each other one day, and called their militias to arms. While they prepared their respective armies for the confrontation, all the citizens of both planets evacuated and settled together on Collibosher to live in peace. The rulers arrived at the designated battlezone in shock at the fact that no one was there to fight their war.
Contrary to most opinions, Zor and Zam's gravitational pull is actually very tolerable for sustaining life. It is the highly jagged and heavily mountainess terrain that prevents a colony from settling there.

Zor and Zam is a song by The Monkees. The song is pretty much about the legend I described; two kings decide to have a war and none of their subjects show-up to fight. It is a good anti-war song. You should check it out.