Timeline of astronomy Rectification of Planetary Theory", eliminated the need for an equant by introducing an extra epicycle, departing from the Ptolemaic system in a way very similar to what Copernicus later also did. Ibn al-Shatir proposed a system that was only approximately geocentric, rather than exactly so, having demonstrated trigonometrically that the Earth was not the exact center of the universe. His rectification is later used in the Copernican model. Nicolaus Copernicus publishes "De revolutionibus orbium coelestium" containing his theory that Earth travels around the Sun. However, he complicates his theory by retaining Plato's perfect circular orbits of the planets. A brilliant
Pursuit of the Sun & Allure of the Earth recent Woods of Ypres concerts. Only "The Sun Was in My Eyes (Part I)" has been documented as a full setlist addition since 2009, though shortened versions of "Summer's Envy" & "The Ghosts of Summers Past" have been played in a medley style occasionally in the band's later years. Pursuit of the Sun & Allure of the Earth Pursuit of the Sun & Allure of the Earth is the first full-length album by the Canadian black metal band Woods of Ypres. It was recorded in 2004 at Spectre Sound in Tecumseh, Ontario. This marked Woods of Ypres' first release with