Black holes. Ilona Žilinskytė, MTFV. A black hole is a region of spacetime from which gravity prevents anything. How? How? Formation. A common type of black hole is produced by certain dying stars. Golden age. In. In this period more general black hole solutions were found. More about black holes. Properties and structure. The no-hair theorem states that. Any two black holes that share the same values for these properties. These properties are. Singularity. At the center. General relativity. In 1915, Albert Einstein developed his theory of general relativity. Physical properties. The simplest static black holes have mass but neither electric charge nor angular momentum. What is more. Photon sphere. The photon sphere. While light can still escape from inside the photon sphere. Ergosphere. Rotating black holes. In real life it looks like. ? ? ? Simulated view of a black hole (center) in front of the Large Magellanic Cloud. Were you attentive? . Black hole is?. 2. Classifications of black holes. Thank you for listening. .