Globular cluster
The number of globular clusters discovered continued to increase, reaching 83 in 1915, 93 in 1930 and 97 by 1947. A total of 152 globular clusters have now been found in the Milky Way galaxy, out of probably 180 ± 20. The additional, undiscovered globular clusters are believed to be hidden behind the gas and dust of the Milky Way.