Written in an accessible style, this unique book aims at describing the Nobel prize winning works in astronomy to readers who only have a background of high school physics. It gives a glimpse of the work done by those prize-winning astronomers at the forefront of research and the state-of-the-art techniques used for that, to an interested reader. There have been 11 years when Nobel prizes in physics have been given to astronomers. These award-winning works cover almost the entire subject of astronomy, starting from stellar structure all the way to cosmology. The prizes have been divided in 7 categories which are described in 7 chapters. For each prize a brief biography of the winner(s) is given first. The subject of the award is put into context and the reader is reminded of all the basic concepts needed for understanding the work before, finally, the prize-winning work is described. This enjoyable book will give the interested reader an excellent overview of the highlights and development of astronomy of the 20th and early 21st century.

Gravitational waves were first predicted by Albert Einstein in 1916, a year after the development of his new theory of gravitation known as the general theory of relativity. This theory established gravitation as the curvature of space-time produced by matter and energy. To be discernible even to the most sensitive instruments on Earth, the waves have to be produced by immensely massive objects like black holes and neutron stars which are rotating around each other, or in the extreme situations which prevail in the very early ages of the Universe. This book presents the story of the prediction of gravitational waves by Albert Einstein, the early attempts to detect the waves, the development of the LIGO detector, the first detection in 2016, the subsequent detections and their implications. All concepts are described in some detail, without the use of any mathematics and advanced physics which are needed for a full understanding of the subject. The book also contains description of electromagnetism, Einstein's special theory and general theory of relativity, white dwarfs, neutron stars and black holes and other concepts which are needed for understanding gravitational waves and their effects. Also described are the LIGO detectors and the cutting edge technology that goes into building them, and the extremely accurate measurements that are needed to detect gravitational waves. The book covers these ideas in a simple and lucid fashion which should be accessible to all interested readers. The first detection of gravitational waves was given a lot of space in the print and electronic media. So, the curiosity of the non-technical audience has been aroused about what gravitational waves really are and why they are so important. This book seeks to answer such questions.