Dave5

Astronomers at the University of Arizona have discovered excephosphorus, a critical ingredient for life as we know it, in an unexpected location: the outskirts of the Milky Way galaxy. According to conventional wisdom, the element is produced by fusion processes inside very massive stars, which are not believed to exist in the outer reaches of the Milky Way.

https://news.arizona.edu/story/case-missing-phosphorus-astronomers-find-life-ingredient-galaxys-edges