# invariable plane

> plane passing through the barycenter of a planetary system, perpendicular to its angular momentum vector

**Wikidata**: [Q2556676](https://www.wikidata.org/wiki/Q2556676)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Invariable_plane)  
**Source**: https://4ort.xyz/entity/invariable-plane


## References

1. Freebase Data Dumps. 2013