Luxus

Studied under Klin the Elder with his brother Pullus. He extended his master's work and studied the sky of the Hitherworld, a subject not touched in A Treatise on the Nature of the World.

He was the first to describe the movement of the different lights in the sky and correctly describe their heights. His work A Treatise on the Sky of the Hitherworld said that the lights in the sky inhabited a plane parallel to the plane of the ground and ocean. Stars were placed in a cloud with approximately even altitude of 400,000 km. The Sol and Luna were in an infinite line along this plane called the Central Axis. The Central Axis crossed over the center of the Continent. The Sol was a set of large constant lights and the Luna was a set of lesser lights with varying but predictable luminosity. Luna light varied in intensity with a period of 30 days. The great light of the Sol washed out the light of the stars and they were only visible during the night when only the Luna shone.

He also derived the basics of trigonometry and optics as he studied the movements of the Sol, Luna and stars. His work on optics was integral to the inventions of telescopes, eyeglasses and magnifying glasses. His work on trigonometry was useful in expanding the areas of navigation, land-surveying, architecture and ballistics.

Publications

 * A Treatise on the Sky of the Hitherworld
 * On Optics
 * On Trigonometry