# Planck star

> hypothetical astronomical object, theorized as a compact, exotic star, that exists within a black hole's event horizon, created when the energy density of a collapsing star reaches the Planck energy density

**Wikidata**: [Q18881932](https://www.wikidata.org/wiki/Q18881932)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Planck_star)  
**Source**: https://4ort.xyz/entity/planck-star