# Turnoff point

> point on the Hertzsprung-Russell diagram where a star leaves the main sequence after the exhaustion of its main fuel

**Wikidata**: [Q4461574](https://www.wikidata.org/wiki/Q4461574)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Main_sequence_turnoff)  
**Source**: https://4ort.xyz/entity/turnoff-point