LondonA Milky Way radio source has stayed active for over 20 years.

It fits none of astronomy’s known categories, so the object itself is unidentified.

Every known compact source this persistent should also emit X-rays, and none have been detected.

The finding is an unreviewed preprint posted August 21, awaiting independent confirmation.

How each outlet framed it
Phys.org
identifies radio source VT J1906+0849 as brightest known transient in VLASS survey, active 20+ years despite defying classification

Sources: Phys.org