Bøger af August Hall

Cosmology is a field of astronomy that studies the origin and evolution of the universe. General theory of relativity, also called Einstein's theory of gravity, serves as the foundation for comprehending the history and large-scale structure of the universe. A number of significant predictions about the physical world such as the Big Bang origin of the universe, the existence of black holes, effect of gravity on clocks, and gravitational lensing are also based on general relativity theory. According to this theory, numerous astrophysical occurrences produce gravitational waves, which are ripples in the geometry of spacetime and these propagate at the speed of light. This theory provides a unified description of gravity as a geometric property of space and time, also known as the four-dimensional spacetime model. It also improves upon Newton's law of universal gravitation and generalizes special relativity. It serves as the foundation for the fields of relativistic astrophysics and cosmology. This book unfolds the principles and applications of the general theory relativity. It presents researches and studies performed by experts across the globe. The book will help the readers in keeping pace with the rapid changes in this field.

The general theory of relativity, also called the Einstein's theory of gravity and the general relativity theory, is the geometric theory of gravitation. It provides the description of gravity as a geometric property of space and time. There are several astrophysical applications of the general theory of relativity including gravitational lensing, cosmology, gravitational-wave astronomy, and black holes. The theory of general relativity forms the basis for disciplines of cosmology and relativistic astrophysics. Cosmology is a branch of astronomy that studies the origin and evolution of the universe. The contemporary researches in cosmology are based on the field equations of general relativity. Under cosmology, the universe is considered on extremely large scales that are evolving over extremely long times that are comparable to the age of the universe. Some researchers have also proposed cosmological models based on space-times with dimensions, D > 4. Some of the important applications of general relativity in cosmology and astrophysics include gamma-ray bursts, neutron stars, black holes and gravitational waves. This book includes some of the vital pieces of works being conducted across the world, on various topics related to modern general relativity. Researchers and students studying this theory and its applications will be assisted by this book.