Among thousands of sources in the COSMOS field, one object stands apart: it goes undetected in every single JWST band — near- and mid-infrared alike — yet shows a clear, consistent signal from LOFAR at 144 MHz all the way to the VLA at 3 GHz. Hubble, Chandra, Herschel, and ALMA all return nothing. Only radio waves reveal its presence.
The source is compact, only marginally resolved, and displays a steep, unbroken radio spectrum — a hallmark of synchrotron emission with no sign of absorption. Two explanations are on the table. It could be a massive, heavily dust-obscured galaxy sitting deep in the epoch of reionization, shrouded so thoroughly that even JWST cannot penetrate the dust. Or it may be a detached radio lobe — a plasma jet from an active nucleus whose host galaxy lies elsewhere in the field.
Either way, the object marks a new corner of discovery space, accessible only at the intersection of deep radio surveys and JWST's infrared sensitivity.