Diagram of the Nine Planets
Curator's note:
It was a Catholic cleric, a Pole named Nicholas Copernicus (1473-1543), who first published the revolutionary idea of a solar system, proposing in 1543 that the Earth and other planets orbited the Sun. Though commonplace today, Copernicus's theory would not find wide acceptance until the close of the 17th century. Ricci's map still shows the Earth at the center of the cosmos (see also his chart in the upper left margin illustrating the eclipses of the Moon and the Sun). First formulated in ancient Greece and described by Aristotle and Ptolemy, the geocentric (or Ptolemaic) model regarded the Earth as an unmoving, perfect sphere at the center of the universe. The Church embraced the Earth-centered model, zealously opposing the idea of a Sun-centered universe throughout the 17th century (and officially into the 19th century). Indeed, Giordano Bruno (1548-1600) was burned at the stake by the Inquisition in Rome for, among other heresies, his advocacy of the heliocentric model. In 1633, the Inquisition placed Galileo (1564-1642) under house arrest for the same reason