Astrophysical jets are beams of ionized matter ejected along the axis of rotation of a compact object, such as a black hole. When matter falls into a black hole, some of it is redirected by magnetic fields into powerful jets that travel at nearly the speed of light.
The Milky Way is a barred spiral galaxy containing 100–400 billion stars. Its central region contains the Galactic Center Group of fast-moving S-stars orbiting Sagittarius A*, the galaxy's supermassive black hole.
