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Received doctorate in mathematics from NYU's Courant Institute in 1980 specializing in celestial mechanics, dynamical systems. Went on to teach as an assistant professor of mathematics at Boston University 1980-85, then went to NASA's Jet Propulsion Laboratory in 1985 as a trajectory analyst, designing routes to Jupiter, Saturn, Venus, Mars for US spacecraft. While there, formulated a new theory of space travel by using chaos theory to find low energy transfers to the Moon. Theory dramatically demonstrated in 1991 when I rescued a Japanese robotic lunar spacecraft, Hiten, and successfully got it to the Moon on a new type of route. After that, Associate Prof. at Pamona College(1991-92), and was a Research Associate at The Geometry Center at Univ. Minnesota (92-97), then in 1998 went to Princeton University as a Research Collaborator in the Mathematics Department and currently in the Astrophysics Dept. Consult regularly with NASA Headquarters and Boeing Space Division, and other agencies, through my company Innovative Orbital Design. Also a professional artist(painting) with regular exhibitions in the US and Europe. Paintings in a number of collections, including the Smithsonian, Washington, DC.