First image of a black hole

A black hole is a dense, compact object whose gravitational pull is so strong that – within a certain distance of it – nothing can escape, not even light. Black holes are thought to result from the collapse of very massive stars at the ends of their evolution. The gravity is so strong because matter (the mass) has been squeezed into a tiny space.

Using the Event Horizon Telescope, scientists obtained an image of the black hole at the center of the galaxy M87. (There is a supermassive black hole at the center of our Milky way galaxy). The black hole is outlined by emission from hot gas swirling around it under the influence of strong gravity near its event horizon.

The first image Balck hole is shown above.(Taken from https://solarsystem.nasa.gov/system/resources/detail_files/2319_blackhole_1600.jpg ) the crescent-shaped emission ring and central shadow, which are gravitationally magnified views of the black hole's photon ring and the photon capture zone of its event horizon. The crescent shape arises from the black hole's rotation and relativistic beaming; the shadow is about 2.6 times the diameter of the event horizon.

This picture explains about the anatomy of the black hole. To refer more about black hole, refer https://www.jpl.nasa.gov/edu/news/2019/4/19/how-scientists-captured-the-first-image-of-a-black-hole/