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Published: 1st September 2021

Citation: Astronist Institution. (2021). Terarchianism. Available: Last accessed [enter date e.g. 1st Sept 2021].


noun  Astroeschatology

belief in an imminent apocalypse of human life on Earth, especially so as to justify the notion that advancements in spaceflight are not progressing at a fast enough rate.


Astronautic apocalypticism (or spacial apocalypticism)
Cosmic apocalypticism (or astronomical apocalypticism)
Terarchian | təː ɑː kɪən | adjective & noun
Terarchic | təː ɑː kɪk | adjective
Terarchical | təː ɑː kɪkəl | adjective
Terarchically | təː ɑː kɪkəli | adverb


Astro-English: from Astronese, the term terarchian is of Cometanic origin and is used to denote the imminent end of humanity as a result of some sort of inadequacy in the use of scope, typically in relation to humanity’s failures with regards to the endeavour of transcension; the use of the suffix -ism is denotes a belief about such an imminent end.

Encyclopaedic entry for “Terarchianism” on

© 2021 by the Astronist Institution.

Notice: Each definition, extended description and etymological description found on is under copyright protection of the Astronist Institution and therefore should not be used elsewhere except in direct quotation along with a reference to its respective definition page on Exempt from this copyright protection are the words being defined themselves, unless otherwise stipulated with the tag trademark in which the use of such a word for your own commercial purposes is likely a breach of copyright.

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