In 1916, Karl Schwarzchild theorized the existence of black holes as a resolution to Einstein’s field equations for his theory of general relativity. By the mid-20th century, astronomers began detecting black holes for the first time using indirect methods, which consisted of observing their effects on surrounding objects and space. Since the 1980s, scientists have studied supermassive black holes (SMBHs), which reside at the center of most massive galaxies in the universe. And by April 2019, the Event Horizon Telescope (EHT) collaboration released the first image ever taken of an SMBH.
Click here for original story, Astronomers find a sun-like star orbiting a nearby black hole
Source: Phys.org