This is a radio image of the center of the Milky Way galaxy. The arching, parallel lines across the center of the image are known as the Galactic Center Radio Arc. The arc curves straight up and away from the galactic plane, and one end is connected to Sagittarius A* by a structure astronomers call the Arches. Sgr A* is the bright object in the lower right. It is the center of the galaxy, and we are fairly certain it is a supermassive black hole five million times more massive than the Sun. The arc shape may be caused by hot plasma flowing out along a magnetic field from Sgr A*.