Copernican means of or pertaining to the astronomer Nicolaus Copernicus
Tired of this and other confrontations, and mindful of the fact that events of the Thirty Years’ War were moving in the direction of Silesia, Franckenberg moved to Danzig via Breslau in 1641, where he lodged until 1649 with the astronomer Johannes Hevelius, who introduced him to Copernican astronomy.
Renowned anti-Copernican adherents of the Capellan planetary model included Francis Bacon, inter alia, and this model appealed to those who accepted Ptolemy's purely geocentric model was refuted by the phases of Venus, but were unpersuaded by Tychonic arguments that Mars, Jupiter and Saturn also orbited the Sun in addition to Mercury and Venus.
Kuhnian: The philosopher of science, Thomas Kuhn argues in The Structure of Scientific Revolutions with respect to the Copernican Revolution that people are unlikely to jettison an unworkable paradigm, despite many indications that the paradigm is not functioning properly, until a better paradigm can be presented.
The three noblemen and their associates, like Sir Walter Raleigh, John Dee and Thomas Harriot among others, have been interpreted as members of a clique of advanced thinkers called The School of Night, who were interested in promoting new ideas like the Copernican and Galilean view of a heliocentric solar system, and the spirit of open inquiry that underlay it.
The Letter attempted to demonstrate that Copernican theory and the Book of Joshua were not mutually exclusive.