The protoplanetary disk—a rotating ring of gas and dust forming planets—surrounding the star HD 163296 has been analyzed to search for signs of Axion-like particles. These theoretical particles are proposed candidates for ultralight dark matter, which could interact with light by causing birefringence, a phenomenon that rotates the polarization angle of light as it travels through space. By examining six sets of archival near-infrared polarized images taken over multiple time periods, the...