A* and the Mass of Sgr A* (PDF) NRAO article regarding VLBI radio imaging of Sgr A* Peering into a Black Hole, 2015 New York Times video Image of supermassive black hole Sagittarius A* (2022), Harvard Center for Astrophysics (NSF; 12 May 2022) Articles containing video clips Astronomical objects discovered in 1974 Astronomical radio sources Milky Way Sagittarius (constellation) Supermassive black holes