(Paperback)

The closest galactic nucleus in the universe, Sagittarius A* can provide us with a realistic expectation of learning about the physics of strong gravitational fields. This book provides an overview of the ideas and discoveries pertaining to the supermassive black hole at the galactic center known as Sagittarius A*.

(Paperback)

High-energy astrophysics involves the study of exceedingly dynamic and energetic phenomena occurring near the most extreme celestial objects known to exist, such as black holes, neutron stars, white dwarfs, and supernova remnants. This title introduces topics at the forefront of research, including relativistic particles, and energetic radiation.

(Hardback)

Could Einstein have possibly anticipated directly testing the most captivating prediction of general relativity, that there exist isolated pockets of spacetime shielded completely from our own This book presents evidence that just such an entity, with a mass of about three million suns, is indeed lurking at the center of our galaxy.