Episodes Encyclopedia Series Listen About

Episodes Encyclopedia Series Listen About

Home
/
Encyclopedia
/
Concepts
/
Ultimatum

Concept

Ultimatum

An ultimatum given to humanity by unknown entities.

German	Ultimatum
English	Ultimatum
Category	concept

All Concepts Encyclopedia Index

Terranaut

The definitive English-language encyclopedia for Die Terranauten, a groundbreaking German science fiction series published from 1979 to 1981. Created as the ideological counterpoint to Perry Rhodan, the series explored themes of corporate tyranny, ecological consciousness, and the struggle for freedom across 99 episodes and 2.6 million words.

Now translated into English for the first time, with an expanding universe of new story arcs, audiobook productions, and the most comprehensive encyclopedia of the Terranauts universe ever assembled.

Explore

All 99 Episodes
Encyclopedia Galactica
Characters
Planets & Locations
Technology
Story Arcs
Star Empire Terra

Listen

The Terranauts on Spotify
Star Empire Terra on Spotify
Original German Archive

The Series

Published: 1979 — 1981
Publisher: Bastei Verlag
Country: Germany
Episodes: 99 + 18 Collected

© 2026 Terranaut.space — An Encyclopedia of the Terranauts Universe

Created by Lennart Lopin