HL_Tau_protoplanetary_disk-768×768

This ALMA image shows the protoplanetary disc surrounding the young star HL Tauri. ALMA reveals some of the substructures in the disk, like gaps where planets may be forming. Only better observations can eventually tell us whether these gaps are planets, but even if they’re not, the presence of gaps indicates that the disk has calmed enough for planets to form. (ESO/ALMA)