Phosphorus-rich stars likely inherit their peculiar chemistry from another nearby stellar source but their intriguing chemical abundance pattern challenge the present stellar nucleosynthesis theoretical predictions. Here we report the discovery of 15 phosphorus-rich stars with unusual overabundances of O, Mg, Si, Al, and Ce. However, current models of (Galactic) chemical evolution under-predict the phosphorus we observe in our Solar System. Among those elements, the origin of phosphorus is of extreme interest because it is known to be essential for life such as we know on Earth. Almost all chemical elements have been made by nucleosynthetic reactions in various kind of stars and have been accumulated along our cosmic history.
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