The Mysterious Radio Source That Has Been Active for 20 Years

VT J1906+0849 is a mysterious radio source in the Milky Way that has remained active for more than 20 years, repeatedly brightening while producing no detectable X-rays.

Astronomers believe it may involve a black hole or neutron star feeding on surrounding matter, with a dense disk wind hiding its central engine while powering powerful radio jets. The object could represent a previously unknown class of stellar remnants.

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