Astrophysics is a branch of astronomy which applies the principles of physics and chemistry. It seeks to determine the nature of astronomical objects, instead of their positions or movement in space. There are several objects studied under this discipline such as stars, galaxies, extrasolar planets and cosmic microwave background. It aims to examine various properties of these objects, such as luminosity, density, temperature and chemical composition, as well as their emissions. There are two major divisions within this field- observational astrophysics and theoretical astrophysics. The former focuses on recording data, and the latter deals with finding out the measurable implications of physical models. The extensive content of this book provides the readers with a thorough understanding of astrophysics. It elucidates the concepts and innovative models around prospective developments with respect to astrophysics. It aims to serve as a resource guide for students and experts alike and contribute to the growth of the discipline.