The galactic center, imaged in infrared by the Spitzer space telescope [NASA/JPL-Caltech]

The History of the Discovery of Sgr A*

At the center of the Milky Way hides a four-million solar mass black hole. The confirmation of its existence, which took place thanks to the study of star orbits conditioned by its immense gravity, earned the Nobel Prize 2020 for physics to Andrea Ghez and…