http://www.newsweek.com/infant-stars-baby-stars-baby-planet-infant-planet-alma-974755

Researchers probing the hoops and gaps within a young star’s swirling protoplanetary disk believe three baby planets could be to blame for these grooves.

Writing in two papers published in Astrophysical Journal Letters, two separate teams have used a cutting-edge technique that maps the flowing gas around a star’s warped and speckled disk to confirm infant star HD 163296 is circled by the newly-formed planets.