galactic habitable zone

English edit

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Etymology edit

galactic +‎ habitable zone

Noun edit

galactic habitable zone (plural galactic habitable zones)

  1. (astrobiology, astronomy) the zone in a disk galaxy lying within the disk which is neither too far from the core so as to be lacking in heavier elements, nor too close to the core as to experience excessive exposures to supernovae, where intelligent life may develop

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