Webb’s infrared images of a supernova’s light echo have uncovered detailed structures within interstellar material, akin to a cosmic CT scan revealing the hidden framework of space. Credit: NASA, ESA, CSA, STScI, Jacob Jencson (Caltech/IPAC) NASA’s James Webb Space Telescope has captured the infrared glow of an ancient supernova’s light echo, revealing unprecedented 3D details of interstellar dust and gas. The space between stars is filled with gas and dust, varying from dense to sparse, and oft...