Dyson ring
A Dyson ring was a type of megastructure that encircled a star.

In 3190,  discovered a set of Dyson rings around an extragalactic star believed to have been constructed by Species 10-C, as they were composed of a silicon-ellanium alloy, the same rare material as the DMA controller. ()

Another set of Dyson rings were present around Species 10-C's new home star inside the hyperfield. ()

See also 
 Dyson sphere
Proto-core

External link 
 

Space stations