These globular clusters serve as celestial time capsules. Containing tens of thousands to millions of stars, they are among the oldest structures in the Milky Way, with many exceeding 10 billion years in age. Their formation predates the thin disk where our Sun orbits, placing them near the dawn of the universe itself.
While astronomers once assumed all stars within a cluster shared an identical birth and chemical composition, Hubble data suggests a far more intricate history. A comprehensive survey of 65 clusters, including NGC 6723, has revealed how stellar mass influences movement, with heavier stars sinking toward the core while lighter ones migrate to the periphery. This ongoing research continues to reshape our understanding of how galaxies assemble their earliest components.





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