Peony raised her hand.
"Omega Centauri -- the brightest globular cluster in the Milky Way.
Within Centauri,it's found that certain metal-rich stars were about two billion years younger than some of their neighbors, implying that the globular cluster must have experienced at least two periods of star formation. Scientists suggest that the cluster was formed in a separate dwarf galaxy, which was then sucked into the Milky Way, stimulating a new burst of star formation."
She paused.
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