Mysterious Structures Discovered in the Heart of the Milky Way's Black Hole.
Astronomers have discovered filaments of radio energy, a few light-years long, streaming outward along the galactic plane from Sagittarius A*, the black hole at the center of the Milky Way galaxy. The streaks may be the fading remains of explosive outbursts from the black hole. The discovery adds a new dimension to the electrical complexity of the Milky Way. The geometry of the new streaks suggests that the black hole is spinning on an axis that is likewise parallel to the plane. Future observations with the Event Horizon Telescope should shed further light on the behavior and orientation of the black hole.