The Certified Wound Care Nurse exam is offered quarterly at various testing centers across the United States. The fee to take the exam is $300 with discounts applied if more than one WOCNCB certification exam is taken at a time.
The Ptolemaic model of the solar system held sway into the early modern age; from the late 16th century onward it was gradually replaced as the consensus description by the heliocentric model. Geocentrism as a separate religious belief, however, never completely died out.
Johannes Kepler used Brahe's measurements to improve the heliocentric system Copernicus had proposed, showing that planets had elliptical orbits around the sun. When Isaac Newton applied the newly discovered universal theory of gravitation to the data, he used a heliocentric model.