Dimitrios Psaltis is a professor of astronomy and physics at the University of Arizona. He has pioneered the development of tests of Einstein’s general theory of relativity in strong gravitational fields using observations of black holes and neutron stars in the electromagnetic spectrum.
Does Einstein’s Theory of Gravity Hold Near Black Holes?
General relativity has never been tested in places where the effects of gravity become truly extreme—for example, at the edge of a black hole. That will soon change