Sun KwokSun Kwok is the Dean of Science and Chair Professor of Physics at the University of Hong Kong. He has published over 250 scientific papers in the fields of interstellar medium and stellar evolution and is best known for his theory on the origin of plnetary nebulae and for the study of organic compounds in the circumstellar environment. His observing experience covers the entire electromagnetic spectrum from radio to X-ray, and has observed extensively with most major ground-based and space-based telescopes. He has also recently written two books, The Origin and Evolution of Planetary Nebulae and Cosmic Butterflies, published by Cambridge University Press. Read More Read Less