Astronomers have spotted centimeter-sized “pebbles” swirling around two infant stars 450 light-years away, revealing the raw ingredients of planets already stretching to Neptune-like orbits. Using the UK’s e-MERLIN radio array, the PEBBLeS project found these rocky seeds in unprecedented detail, bridging the elusive gap between dusty discs and fully-formed worlds. The discovery hints that systems even larger than our own could be commonplace and sets the stage for the upcoming Square Kilometre Array to map hundreds more planetary nurseries.
