# Hubble sequence

> morphological classification scheme for galaxies invented by Edwin Hubble

**Wikidata**: [Q208620](https://www.wikidata.org/wiki/Q208620)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Hubble_sequence)  
**Source**: https://4ort.xyz/entity/hubble-sequence


## References

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