Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have uncovered evidence that three infant planets are forming in the protoplanetary disk around HD 163296, a young star located approximately 398 light-years away in the constellation Sagittarius. An artist’s impression of protoplanets forming around a young star. Image credit: NRAO / AUI / NSF / S. Dagnello. Protoplanetary disks are the gas- and dust-filled planet factories...
