# proton–proton chain reaction

> one of the fusion reactions by which stars convert hydrogen to helium

**Wikidata**: [Q223073](https://www.wikidata.org/wiki/Q223073)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Proton–proton_chain)  
**Source**: https://4ort.xyz/entity/proton-proton-chain-reaction


## References

1. Freebase Data Dumps. 2013