Dyson sphere

A Dyson sphere was a megastructure that engulfed an entire star and harvested its energy. Dyson spheres were quite possibly first introduced during or prior to the Rakata species' reign over the galactic community. At least four Dyson spheres constructed by the Rakata were known to modern historians - only one of which, now in ruins, left intact in the following millennia - and were named after Dysonias, a historian who specialized in the study of these megastructures and lived circa 6000 BBY. The one surviving Dyson sphere, built around a yellow dwarf star in the Corusca sector, was believed to still be functional in the early years of the Galactic Republic, and may have been used by Humans as a source of energy before an unknown disaster resulted in its destruction. While no Dyson spheres would be successfully constructed thereafter, many civilizations crafted other means of successfully harvesting a star's energy, most notably the energy web - a network of energy-harvesting satellites that orbited a star.

During the Galactic Empire's brief existence, Imperial researchers planned the construction of the stellar harvester, though the project was abandoned after the fleet of ships carrying materials to create the megastructure around a neutron star in Wild Space was intercepted and destroyed by a fleet of Rebel privateers in 1 BBY.