Johannes Kepler is a fascinating man who would revolutionize humanity's conception of the cosmos and their place within it. He would replace the Ptolemaic syste

A biography of Johannes Kepler, the astronomer and mathematician who formulated the three laws of planetary motion.

The Lord of Uraniborg is a comprehensive biography of Tycho Brahe, father of modern astronomy, famed alchemist and littérateur of the sixteenth-century Danish

As a student in Germany in the sixteenth century, Johannes Kepler became convinced the Sun was at the center of the planets and the universe operated on the sam

APlusPhysics: Your Guide to Regents Physics Essentials is a clear and concise roadmap to the entire New York State Regents Physics curriculum, preparing student