Passing references by the lead character to the song "The Green Hills of Earth" and to its author, Rhysling, have caused some to consider it part of Heinlein's "Future History" series.
Unlike most literary awards, which are named for the creator of the award, the subject of the award, or a noted member of the field, the Rhyslings are named for a character in a science fiction story: the blind poet Rhysling, in Robert A. Heinlein's short story The Green Hills of Earth.
Earth | Green Day | Green Party | Earth-616 | Green Bay Packers | Google Earth | The Hills | Green Bay, Wisconsin | Earth Day | Beverly Hills | Green | Green Lantern | Friends of the Earth | Beverly Hills, California | Green Acres | From the Earth to the Moon | Cursed Earth | Earth, Wind & Fire | Al Green | Middle-earth | Green Bay | Bowling Green State University | Dixon of Dock Green | Black Hills | Anne of Green Gables | Tom Green | Bowling Green, Kentucky | Green River | Wood Green | Goose Green |