Loud in radio, invisible in X-rays: the Milky Way source that refuses to fade

A radio source in the Milky Way, VT J1906+0849, has stayed bright for two decades, refuses to expand, and emits no X-rays — unlike anything astronomers have cataloged. A new study proposes a hidden engine: a young microquasar, an accreting neutron star or black hole wrapped in a thick wind that powers its radio glow while hiding its X-rays.