How Old Are Third Generation Stars

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Third generation stars in the Milky Way could be nearly as old as the universe, approximately 14 billion years. Supermassive Population III stars may go nova within 100 million years, leading to the rapid expiration of some of their offspring. However, the low mass descendants of these first-generation stars could still exist today. This longevity suggests that while some stars have short lifespans, others have persisted for nearly the entire age of the universe. Understanding the age and evolution of these stars provides insight into cosmic history.
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Some could be nearly as old as the universe [~14 billion years]. Supermassive pop III stars could go nova in less than 100 million years. Some of their offspring could also have expired after a similarly brief existence [although not quite as quick as their metal free parents]. But low mass grandkids of the first generation could still be around - hence nearly as old as the universe.
 

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