Wind from Milky Way's supermassive black hole is finally discovered

After five decades of attempts, astronomers have finally discovered a gentle wind emanating from Sagittarius A* (Sgr A*), the supermassive black hole at the center of the Milky Way galaxy. Researchers used data from the ALMA telescope and NASA's Chandra X-ray Observatory to identify a vast conical cavity of hot, electrically charged gas near Sgr A*, which they concluded was sculpted by this wind. This discovery, published in the Astrophysical Journal Letters, resolves a long-standing mystery regarding whether Sgr A* expels material, similar to other active supermassive black holes. The wind suggests that more gas is ejected from Sgr A* than falls into it, despite its relatively quiescent phase, validating a theoretical prediction made decades ago.