# Messier 55

> Globular cluster

**Wikidata**: [Q13965](https://www.wikidata.org/wiki/Q13965)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Messier_55)  
**Source**: https://4ort.xyz/entity/messier-55


## References

1. SIMBAD
2. VizieR
3. [Messier 55](http://www.messier.seds.org/m/m055.html)
4. [Revised NGC Data for NGC 6809](http://spider.seds.org/ngc/revngcic.cgi?NGC6809)
5. A Catalogue of Star Clusters shown on Franklin-Adams Chart Plates
6. Freebase Data Dumps. 2013
7. A catalog of parameters for globular clusters in the Milky Way
8. Ultraviolet properties of Galactic globular clusters with GALEX. II. Integrated colors
9. Uniting old stellar systems: from globular clusters to giant ellipticals
10. "Galaxy," defined
11. Insights into pre-enrichment of star clusters and self-enrichment of dwarf galaxies from their intrinsic metallicity dispersions
12. The ACS survey of galactic globular clusters. X. New determinations of centers for 65 clusters
13. Global survey of star clusters in the Milky Way