Any bodybuilder will tell you that you can’t bulk up overnight, but that might not be true for stars. While observing infant star Gaia 17bpi, astronomers saw part of its dense disk collapse onto its body below — adding mass at an incredible rate. This encounter is one of the few times that researchers have seen a star’s disk become gravitationally unstable and fall down to its host. The findings, which will appear in the Astrophysical Journal, could shed light on stellar evolution and help a