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25.11.2021 — Jean-Pierre Lasota (Institut d'Astrophysique de Paris, Nicolaus Copernicus Astronomical Center): How to tell that something is a black hole 🎥
Black holes are invisible, hence difficult to detect. There are, however, methods to establish their presence in various astronomical systems, one was even rewarded with a Nobel Prize. After a short description of black-hole properties, I will review several observational techniques used to find and identify these purely gravitational objects.