# Preliminary Reference Earth Model

> model representing the average Earth properties as a function of planetary radius

**Wikidata**: [Q1318259](https://www.wikidata.org/wiki/Q1318259)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Preliminary_reference_Earth_model)  
**Source**: https://4ort.xyz/entity/preliminary-reference-earth-model