Black holes emit no light of their own, and absorb everything that crosses their event horizon. But they are not invisible, and thanks to some spectacular breakthroughs of recent years, now we can see them. I will tell the remarkable story of black hole imaging and explain the science in simple terms: What are we looking at in a black hole image, and what do we learn from it? I will also describe the exciting future of this new field, with new telescopes and space missions set to probe black holes in finer detail than ever before, putting our understanding of gravity to the ultimate test.
Bio: Prof. Gralla works in gravitational physics at the intersection of theory and experiment, with an emphasis on black holes. He is widely regarded as an effective public speaker, with his recorded lectures receiving hundreds of thousands of views online. https://youtu.be/Dn33_ySzB-w