ALMA (ESO/NAOJ/NRAO), C. GonzálezBy Rebecca Boyle Astronomers have never seen anything like it: two stars, each swaddled in planet-forming discs – and then a third, larger disc around the entire lot. Named IRS 43, the system is 400 light years away from Earth. The cosmos is chock-full of stars surrounded by planets and planet-forming discs. It’s also...