Marshall H. Kaplan, Ph.D., is a Visiting Professor of Aerospace Engineering. He is an expert in space flight technologies, orbital mechanics and space debris issues. In fact, he was the first to study space junk retrieval and was instrumental in the safe reentry of the Skylab Space Station in 1979. He has over four decades of academic and industrial experience, having served as Professor of Aerospace Engineering at the Pennsylvania State University and presented hundreds of courses on space technology and systems. In addition to publishing over 100 papers, reports and articles on aerospace technologies, he is the author of several books, including the internationally used text, Modern Spacecraft Dynamics and Control. Dr. Kaplan is a member of the AIAA Technical Committee on Space Transportation and holds advanced degrees from MIT and Stanford University.