Pair-instability supernova

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A pair-instability supernova is a type of supernova predicted to occur when pair production — the production of free electrons and positrons in the collision between atomic nuclei and energetic gamma rays — temporarily reduces the internal radiation pressure supporting a supermassive star's core against gravitational collapse.

Excerpt from the Wikipedia article “Pair-instability supernova”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: NASA/CXC/M. Weiss, Public domain, via Wikimedia Commons.