Nolderyne and Sagar were a pair of planets that formed a double planet in Orbit Four of the Vanderlin system. The Vanderlin System originally had eight orbits, until the two planets orbited too close to each other, and Sagar was attracted by Nolderyne's gravity. This happened sometime around 1 million BBY.
Nolderyne was able to support life, although it was a cold planet, having winter for two-thirds of the four-hundred-eleven-day year. Sagar was also to support life, but much of the planet was mountains and caves. The remaining portion, once forests, was made into large cities and Sagar became a wealthy trade post. Nolderyne had a strong military, but not strong enough to defend the Empire, since they invaded in 5 BBY, taking control of the double planet.