Articles related to "Epicycle"

Ptolemy's geocentric astronomical system used four geometric devices, the deferent, epicycle, eccentric, and equant, to explain the observed motions of the planets.

Ptolemy's geocentric astronomical system placed Earth at the center of the universe and he was considered the ultimate authority in astronomy for about 1400 years.

Changes in world views happened during the Scientific Revolution of the 18th Century. However, early thinkers, as far back as the 1300s helped lay the foundation.