Geocentric model Geocentric model In astronomy, the geocentric model (also known as geocentrism, or the Ptolemaic system) is a superseded description of the Universe with Earth at the center. Under the geocentric model, the Sun, Moon, stars, and planets all orbited Earth. The geocentric model served as the predominant description of the cosmos in many ancient civilizations, such as those of Aristotle and Ptolemy. Two observations supported the idea that Earth was the center of the Universe. First, from anywhere on Earth, the Sun appears to revolve around Earth once per day. While the Moon and the planets have their own motions,
Central High School (Pueblo, Colorado) and an outlying building used as a gym and school meeting area. It was built in 1906. The foyer features right-facing swastikas set into the tile floor. The original Central High School building on Pitkin Avenue (later used as an elementary school) was built of pink rhyolite; the "Stone Schoolhouse" was added to the National Register of Historic Places in 1979. Central first opened in 1883, and in 1886 graduated its first class of nine students. In 1889 Central introduced vocational education into its curriculum, making the district the first west of the Missouri River to introduce what was then