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Published: 1st September 2021

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


noun  Astroeschatology

opposition to the assertion that extraterrestrial life of any or a specified form or frequency exists in The Cosmos.


Anti-extraterrestrialist | antɪˌ ɛkstrətəˈ rɛstrɪəlɪst | adjective & noun
Anti-extraterrestrialistic | antɪˌ ɛkstrətəˈ rɛstrɪəlɪstɪk | adjective


Astro-English: from Astronese, the prefix anti- is used to denote “negation” or “rejection of an assertion”, hence when conjoined to the word extraterrestrialism denoting “belief in the existence of some form of extraterrestrial life”, altogether means “active opposition to the notion of the existence of extraterrestrial life.”

Encyclopaedic entry for “Anti-extraterrestrialism” on

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