Kavli Affiliate: John E. Carlstrom | First 5 Authors: Dimitrios Psaltis, Lia Medeiros, Pierre Christian, Feryal Ozel, Kazunori Akiyama | Summary: The 2017 Event Horizon Telescope (EHT) observations of the central source in M87 have led to the first measurement of the size of a black-hole shadow. This observation offers a new and clean gravitational […]