They are not visible directly — too thin even for ALMA. But they betray themselves with a double brightness peak, like an echo of an invisible bell. In the disk of the young star CI Tau, astronomers heard the signal of hidden dust rings — cradles of future planets. This is how light, shifting its tonal quality on a tilted disk, paints the architecture of the unseen. Perhaps our Solar System began just like this. Now the 'double echo' method will be applied to hundreds of other disks.
🎯 The age of CI Tau is only about two million years, so planets might be forming in this disk right now. The discovered rings are so narrow that their width is smaller than the ALMA beam size; without the azimuthal trick, they would have remained hidden forever.