Heidelberg 2022 – wissenschaftliches Programm

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AGPhil: Arbeitsgruppe Philosophie der Physik

AGPhil 5: Black Holes II

AGPhil 5.1: Hauptvortrag

Dienstag, 22. März 2022, 16:15–17:00, AGPhil-H14

Portrait of a Black Hole: Objectivity and the Imaging of M87* by the Event Horizon Telescope — •Peter Galison — Black Hole Initiative, Harvard University, Cambridge, Mass. United States

In thousands of atlases depicting the working objects of scientific inquiry--from skeletons, clouds, and plants, to crystals, elementary particles, and stars, physicians and scientists across many domains worked out what counted as scientific objectivity. This long-term history, with its various takes on what a reliable image should be, converged in the yearslong struggle of the Event Horizon Telescope (EHT) to produce a picture of a black hole robust enough to make public. As a member of the imaging group, I was part of this effort--offering an occasion for the direct interaction of philosophy and physics as we in the collaboration thought through the different forms of images in consideration: ideal images, mechanically objective images, and expert judgment images. On April 10, 2019, the team released the first image of a black hole, an image viewed within a very few days by more than a billion people. This is a talk about how the EHT team of some 200 scientists came to assess as objective the glowing, crescent-like ring around the supermassive black hole M87*.