Titlebook: Exploring the Universe; A Practical Guide fo James Dire Book 2024 The Editor(s) (if applicable) and The Author(s), under exclusive license

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Globular Star Clusters,en Sawyer developed a classification scheme for globular clusters. The Shapley-Sawyer classifications are numbered with Roman numerals I to XII based on the concentration of stars in the cores of the clusters. Level I clusters have the highest concentration of stars in their cores. Level XII clusters have virtually no concentrated cores.

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Titlebook: Exploring the Universe; A Practical Guide fo James Dire Book 2024 The Editor(s) (if applicable) and The Author(s), under exclusive license

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