Two articles, one published in “The Astrophysical Journal” and one in “The Astrophysical Journal Letters”, report various aspects of a study of the protoplanetary disk surrounding the young star Elias 2-27. Two teams of researchers with various members in common and Teresa Paneque Carreño as principal investigator used the ALMA radio telescope to study that star system in formation. In particular, they studied the gravitational perturbations that generated the spiral arms in the disk. This is a step forward in understanding the mechanisms of formation of new planets.