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Discovery of ancient stars on the stellar thin disk of the Milky Way
These maps, known as chrono-chemo-kinematical maps ... some of them even older than 13 billion years. These ancient stars show a wide range of metal compositions: some are very metal-poor ...
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Ancient Stars Were Found In An Unlikely Region Of The Milky Way, Suggesting It's Billions Of Years Older Than We Thought
A large number of ancient stars were found in an unlikely region ... astronomers must create detailed maps of the galaxy that show the age, makeup, and movements of stars. It is a challenge ...