ScienceJune 16, 2026

exoplanet

/ˈɛksoʊˌplænɪt/

Definition

A planet that orbits a star outside of our own solar system.

Etymology

Derived from the Greek prefix 'exo-' (meaning 'outside') and the word 'planet.' It was coined in the late 20th century to describe the growing number of planetary bodies discovered orbiting stars other than the Sun.

In the news

The term is used here as a categorical heading for space science research interests, highlighting the ongoing academic focus on discovering and studying worlds beyond our own.

NASA Spaceline Current Awareness List #1,204 12 June 2026 (Space Life Science Research Results)

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Astrobiology News

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