I'll give you a question, please answer with step-by-step reasoning process.
Older stars collect in groups called what on the outer regions of a galaxy?\nOptions:\n- night sky\n- black hole\n- globular cluster\n- press conference\n- heavens

globular cluster
The collection of older stars in groups is called as globular cluster.

Globular cluster is a group in which older stars get collected on the outer regions of a galaxy.

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So, the answer is globular cluster