The main aspects of black hole theory

Abstract

Black holes are extremely compact objects which no one knows exactly what it is, and astrophysicists, whether in the past or the present, have been devoting a great deal of time to studying them. The establishment of black hole theory takes a lot of time. There are quite some difficulties in breaking continuous negation, admitting, and researching black holes. In this paper, we first look back at the discovery process of black hole theory. We mainly review the three aspects of black holes: physical properties, classification and observational methods. Black holes are invisible and many astrophysicists in the past only can investigate them based on theoretical understanding, so we present some new and clear evidences of black holes to prove this theory. In this paper, some new models and applications of black holes (e. g. Hawking Radiation Theory, The Penrose Process) that may be discovered in the future will be presented too.