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General relativity (Physics)
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Video
More than one hundred years ago, Albert Einstein published his Theory of General Relativity (GR). One year later, Karl Schwarzschild solved the GR equations for a nonrotating, spherical mass distribution; if this mass is sufficiently compact, even light cannot escape from within the socalled event horizon, and there is a mass singularity at the center. The theoretical concept of a 'black hole' was born, and was refined in the next decades by work of Penrose, Wheeler, Kerr, Hawking and many others. First indirect evidence for the existence of such black holes in our Universe came from observations of compact Xray binaries and distant luminous quasars. I will discuss the fortyyear journey, which my colleagues and I have been undertaking to study the mass distribution in the Center of our Milky Way from ever more precise, longterm studies of the motions of gas and stars as test particles of the space time. These studies show the existence of a four million solar mass object, which must be a single massive black hole, beyond any reasonable doubt.
Event date: 09/02/2023
Speaker: Prof. Reinhard GENZEL
Hosted by: PolyU Academy for Interdisciplinary Research
 Subjects:
 Cosmology and Astronomy and Physics
 Keywords:
 Astrophysics Astronomy Deep space  Milky Way Nobel Prize winners General relativity (Physics) Black holes (Astronomy)
 Resource Type:
 Video

ebook
Relativity Lite is designed for courses like my 100student General Astronomy sequence. Relativity Lite translates the mathematical equations conventional relativity texts rely upon into pictures that are readily understood and contain within them the mathematical essentials. This new book would provide the comprehensive coverage needed to understand, in sufficient depth, these three linked areas of our reality.
 Subjects:
 Physics
 Keywords:
 General relativity (Physics) Special relativity (Physics) Textbooks Astronomy
 Resource Type:
 ebook

Courseware
An introduction to Einstein’s theory of gravitation. Tensor analysis, Einstein’s field equations, astronomical tests of Einstein’s theory, gravitational waves.
 Subjects:
 Physics
 Keywords:
 Gravitation General relativity (Physics) Einstein Albert 18791955
 Resource Type:
 Courseware