A matrioshka brain is a hypothetical megastructure proposed by Robert Bradbury, based on the Dyson sphere, of immense computational capacity. It is an example of a Class B stellar engine, employing ...

In his novel "Accelerando," Stross describes a Matrioshka brain around our sun, fashioned from the debris of inner planets that have been pulverized (not Earth). A Matrioshka brain could be used ...