Balance is a name given to the narrow habitable band that stretches about the circumference of Solus near the terminator. The hemisphere of the planet to one side of Balance is in perpetual sunlight, and quickly becomes a very hostile environment due to unbearably high temperatures and cosmic radiation. This hemisphere is sometimes called Heaven by the largely sun-worshiping inhabitants of Balance. The opposing hemisphere, named Oblivion is equally hostile due to its nearly absolute darkness and bitterly cold temperatures.
To many people, the names Balance and Solus are essentially interchangeable. Except for the most adventurous of souls, the small band of the planet comprising Balance is the world, since everything else is thought to be infinite wastes.