Gas Dynamics (The Physics of Astrophysics)
Frank Shu is a Professor of Astronomy at the University of California, Berkeley.  He received his PhD from Harvard University in 1968.  Shu has written a number of expository articles for the lay public, and is the author of a best-selling introductory textbook in astronomy and astrophysics, The Physical Universe.  He is a member of the U.S. National Academy of Sciences and Academia Sinica.