Abstract
It has been called to my attention that, in my recent review (PSCF 56, no. 4 [2004]: 299-300) of Owen Gingerich's volume The Book Nobody Read: Chasing the Revolutions of Nicholaus Copeprnicus, I confused Copernicus with Tycho Brahe in stating that Copernicus advocated a dual revolutionary hypothesis whereby the planets revolved around the earth and the earth, in turn, revolved around the sun.