This is first time ever image of a black hole captured. The black hole lies in the center of galaxy M87. The image is captured by Event Horizon Telescope(EHT). It is ground based telescope.
A black hole is a region in space where the pulling force of gravity is so strong that light is not able to escape. The strong gravity occurs because matter has been pressed into a tiny space. This compression can take place at the end of a star’s life. Some black holes are a result of dying stars. Because no light can escape, black holes are invisible .
However, space telescopes with special instruments can help find black holes. They can observe the behavior of material and stars that are very close to black holes.