# metallicity

> fraction of mass of a star or other kind of astronomical object that is not in hydrogen or helium

**Wikidata**: [Q217030](https://www.wikidata.org/wiki/Q217030)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Metallicity)  
**Source**: https://4ort.xyz/entity/metallicity


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)