What began far from observatories and telescopes—in fact, in a casual conversation between Mexican scientists while one of them was waiting for a medical appointment—ended with a troubling question about the chemical composition of the oldest galaxies ever observed.
Recent observations from the James Webb Space Telescope showed very young galaxies, formed shortly after the Big Bang, but with surprisingly high amounts of nitrogen for their short cosmic age.
According to classical models of stellar evolution, nitrogen is produced slowly, over several generations of stars, and detecting it in large quantities in young galaxies was impossible!
Those galaxies had not had enough time to recycle stellar material over and over again, yet the data…
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Source www.theweather.com
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