Planetary debris disks, or protoplanetary disks, are some of the most interesting phenomena in astronomy – these giant clouds of dust and gas surrounding young stars are the birthplaces of new planets. Now, astronomers studying one of these disks have found structures never seen before, giant “ripples” which are arch-like or wave-like in appearance.
Read MoreUnusual fast-moving ‘ripples’ discovered in planetary debris disk surrounding nearby star