... still regarded as the most important contribution to the general theory of relativity since Einstein. Reinhard Genzel and Andrea Ghez each lead a group of astronomers that, since the early 1990s, has focused on a region called Sagittarius A* at the...
... that the black hole existed. This pioneering work was led by groups headed by Reinhard Genzel and Andrea Ghez, and their efforts won the duo half a Nobel Prize in Physics in 2020. Since then, Genzel and...