Messier 55, also known as M55 or NGC 6809, is a globular cluster of stars in the constellation Sagittarius, discovered by the French astronomer Nicolas-Louis de Lacaille in 1752 and added to Charles Messier's catalogue in 1778. It lies roughly 17,600 to 20,000 light-years from Earth and is comparatively loosely concentrated for a globular cluster, allowing its individual member stars to be resolved even in modest telescopes.
Facts
Classification
Constellation Discovery Year In the Other Atlases
In Constellation
Also in Divinity Atlas: the constellation this subject lies in.
Sources
1. Wikipedia (space and spaceflight articles)
Wikimedia Foundation
2. Wikidata: Messier 55
Messier 55 (Wikipedia)
Messier 55, Wikipedia - lead section, catalogue classification
Messier 55 (also known as M55, NGC 6809, or Specter Cluster) is a globular cluster in the south of the constellation Sagittarius.
Messier 55, Wikipedia - lead section, constellation
Messier 55 (also known as M55, NGC 6809, or Specter Cluster) is a globular cluster in the south of the constellation Sagittarius.
In Group: Globular Clusters, Lead sentence
Messier 55 (also known as M55, NGC 6809, or Specter Cluster) is a globular cluster in the south of the constellation Sagittarius.
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