Ertar is an alternative reality project, created by a group of Czech science fiction fans, led by D.Cap. The theme evolved from work on an officially unrecognized fan magazine named Light Years, founded in 1982, that as mainly a means of information on science fiction movies seen abroad. After November 1989 the science fiction films started to be accessible in Czechoslovakia and the fan club turned to a wider spectrum of activities. Though the film fan magazine continues its existence, the club activities are centered on creating a modern Utopian republic known as Ertar. Special conventions and new-year meetings take place every year, contributing new facts to the mosaic of this parallel world.

D. Cap - convention "Ercon 2004"

Fan activities ("Ertology") are based on creating reports on a parallel world named Ertar, on the planet Ergea, manufacturing artifacts "brought" from there, and taking an active part in science fiction conventions. Honorary members of the fan club include famous Czech writer and musician Jaroslav Velinský (Kapitán Kid), whose songs are used in the "restoration" of some Ertarian artifacts.

Kapitán Kid