Charles Messier catalogued the cluster as M6 in 1764 and it wasn't till the 20th century that star counts, distance, and other properties were measured.
It was not till the 20th century that star counts, distance, and other properties were measured. Charles Messier catalogued the cluster as M6 in 1764.
Charles Messier catalogued the cluster as M6 in 1764. It was not till the 20th century that star counts, distance, and other properties were measured.
Charles Messier catalogued the cluster as M6 in 1764. It was not till the 20th century that star counts, distance, and other properties were measured.