Advances in Geometry and Lie Algebras from Supergravity by Pietro Giuseppe Fré

Author:Pietro Giuseppe Fré
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

6.1 Historical Introduction

When on September 14th 2015 the gravitational wave signal emitted 1.5 billion year ago by two coalescing black stars was detected at LIGO I and LIGO II, we not only obtained a new spectacular confirmation of General Relativity but we actually saw the dynamical process of formation of the most intriguing objects populating the Universe, namely black holes (Fig. 6.1).

Fig. 6.1The gravitational wave signal emitted in the coalescence of two black holes which occurred 1.5 billion of years ago was simultaneously detected September 14th 2015 by the two interferometers LIGO I and LIGO II

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