... DISK т?? ... Dust grains highlight the path to planet formation . Scientists captured a clear image of the protoplanetary disk of the star UX Tauri A with dust grains that appear to be in the process of forming planets. ... Polarized light reflected from dust particles gives important information about planetary formation in disks. ... The researchers were fortunate to witness dust particles at a critical phase in their path to becoming a fully-grown planet in the protoplanetary disk. ...