He has worked with the Dutch Navy, the USAF and NASA.
He is the author of several books.
His first book, The Theory of Orbits, is an important text on orbital mechanics[?].
... (1850) Meine Reform der Hegelschen Philosophie (1852) Wissenschaft der logischen Idee (1858-59), with a supplement (Epilegomena, 1862) Hegels Naturphilosophie ...