Dyson sphere is a Tech Level 10 megastructure originally described by Freeman Dyson. Such a "sphere" would be a system of orbiting solar-power satellites meant to completely encompass a star and capture most or all of its energy output. Dyson speculated that such structures would be the logical consequence of the long-term survival and escalating energy needs of a technological civilization, and proposed that searching for evidence of the existence of such structures might lead to the detection of advanced intelligent extraterrestrial life. Different types of Dyson spheres correlate with information on the Kardashev scale.
Since then, other variant designs involving building an artificial structure or series of structures to encompass a star have been proposed in exploratory engineering or described in science fiction under the name "Dyson sphere". These later proposals have not been limited to solar-power stations. Many involve habitation or industrial elements. Most fictional depictions describe a solid shell of matter enclosing a star, which is considered the least plausible variant of the idea (see below). In May 2013, at the Starship Century Symposium in San Diego, Freeman Dyson repeated his comments that he wished the concept had not been named after him.
Arsenal Dyson SphereEdit
In 5000, the planning steps in converting the Arsenal System into a Dyson Sphere using a large number of satellites was begun, although it was expected to take a few centuries to finish. That plan was officially abandoned in 5050 after the fall of the Kermac and the Galactic Council.
Shortly after the project was abandoned by Assembly vote, Rex Schwartz approached the Assembly requesting to purchase the plans for that project for exclusive use by SII. That request was deigned by an overwhelming vote (due more to the "exclusive use" clause than any other reason.)
For more information, see the wikipedia article on Dyson sphere