Gravitational waves are ripples in the curvature of spacetime that propagate as waves, generated in certain gravitational interactions that propagate outward from their source. The possibility of gravitational waves was discussed in 1893 by Oliver Heaviside using the analogy between the inverse-square law in gravitation and electricity. Predicted in 1916 by Albert Einstein on the basis of his theory of general relativity, gravitational waves transport energy as gravitational radiation, a form of radiant energy similar to electromagnetic radiation.  Gravitational-wave astronomy is an emerging branch of observational astronomy which aims to use gravitational waves to collect observational data about objects such as neutron stars and black holes, events such as supernovae, and processes including those of the early universe shortly after the Big Bang.

In the present book, twelve typical literatures about gravitational waves published on international authoritative journals were selected to introduce the worldwide newest progress, which contains reviews or original researches astronomy, gravity, black holes, effect of gravitation, ect. We hope this book can demonstrate advances in gravitational waves as well as give references to the researchers, students and other related people.