Owen Gingerich is Senior Astronomer Emeritus at the Smithsonian Astrophysical Observatory and Professor Emeritus of Astronomy and History of Science at Harvard University. One of the leading experts on Copernicus, he is the author of numerous books, including The Eye of Heaven: Ptolemy, Copernicus, Kepler and The Book Nobody Read: Chasing the Revolutions of Nicolaus Copernicus.