Freeman Dyson

Freeman Dyson was a 20th century Human physician, native to Earth, who theorized in the construction of Dyson Spheres, which could be built around stars and provide gigantic habitats.

In the 2260s, the USS Enterprise discovered a Dyson Sphere named Lyra. (TOS novel: The Starless World)

In 2294, the USS Jenolen encountered a Dyson Sphere while enroute to Norpin V. After attempting to contact the Sphere, the vessel crashlanded on the surface and left only two survivors. (TNG novelization: Relics; novel: Dyson Sphere)

In the 24th century, the USS Freeman Dyson, a Nova-class starship, was named after Dyson.