Typically, these stars are hidden behind gas and dust clouds, existing in this area, but the European Southern Observatory (ESO) in Chile used its infrared telescope to peer deep into the "home" the black hole. Based on the orbital trajectories of these 28 stars, astronomers have not only been able to pinpoint the location of the black hole, but also found it a lot … For a long time, scientists have concluded that the supermassive black holes may occupy a central of most galaxies, whether they are small (dwarf) galaxies, the thin galactic disks or large spiral galaxies, most galaxies appeared to have the hole. But to actually see a black hole – quite a difficult task; astronomers rather watch already the effects of a supermassive black hole on the surrounding gas, dust and stars than the object itself (in the end, the black hole is black on definition). In 1992, astronomers using the 3.5-meter telescope of the European Southern Observatory (ESO) in Chile, made using new technology, is finally paid attention to our core, a native of the Galaxy to to begin an unprecedented campaign to monitor them. Since 2002 was enacted 8.2-meter ultra Space Telescope (VLT). And now, after 16 years, featuring over 50 periods during the night time from the total time observations obtained results. Tracking individual stars orbiting around a common point (celestial object), the researchers of the European Southern Observatory (ESO) have the best empirical evidence the existence of a black hole with a mass equal to 4 million solar masses that has ever been received.