An article published in the journal “Monthly Notices of the Royal Astronomical Society” describes the discovery of a new family of stars at the center of the Milky Way tha are unusually nitrogen-rich. A team of astronomers from the Liverpool John Moores University (LJMU) made this discovery working on the APOGEE (the Apache Point Observatory Galactic Evolution Experiment) project, which aims to collect infrared data of hundreds of thousands of stars in the Milky Way.