Not all rings are forged in fantasy, my precious!
For astronomers, they are found in space and are debris discs, the leftovers of planet formation around stars. You can admire 24 of them in these ALMA images (orange = dust, blue = gas).
The origin of gas in debris discs is debated, and the disc in the two images at the top-right is very interesting in this regard. Here’s why: https://www.eso.org/public/images/potw2603a/
📷 ALMA(ESO/NAOJ/NRAO)/S. Marino et al.
