earth-fixed geocentric system
1Geocentric model — In astronomy, the geocentric model of the universe is the superseded theory that the Earth is the center of the universe and other objects go around it. Belief in this system was common in ancient Greece. It was embraced by both Aristotle and… …
2Geocentric orbit — Earth orbit redirects here. For the motion of the Earth around the Sun, see Earth s orbit. Earth orbiter redirects here. For the shuttle simulator, see Earth Orbiter 1. The following words may have more than one definition or other non Earth… …
3Geocentric Theory — It states that the Earth is a fixed body at the center of our solar system, and the Sun and planets orbit around it. Also called the Ptolemaic Theory. See Pythagoras, Copernicus, Nicolaus and Heliocentric Theory …
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4Geodetic system — For other uses, see Geodetic. Geodesy Fundamentals …
5heliocentric system — ▪ astronomy a cosmological model in which the Sun is assumed to lie at or near a central point (e.g., of the solar system or of the universe) while the Earth and other bodies revolve around it. In the 5th century BC the Greek philosophers… …
6Copernican system — n. the theory of Copernicus that the planets revolve around the sun and that the turning of the earth on its axis from west to east accounts for the apparent rising and setting of the stars: basis of modern astronomy * * * or Copernican principle …
7Counter-Earth — For the Marvel Comics planet, see Counter Earth (comics). The Counter Earth is a hypothetical body of the Solar system first hypothesized by the presocratic philosopher Philolaus to support his non geocentric cosmology, in which all objects in… …
8Timeline of solar system astronomy — Timeline of solar system astronomyAntiquity* 2137 BC, October 22 Chinese astronomers record a solar eclipse *ca. 2000 BC Chinese determine that Jupiter needs 12 years to complete one revolution of its orbit. * 2nd millennium BC earliest possible… …
9Celestial coordinate system — For other uses of Celestial , see Celestial (disambiguation). Orientation of Astronomical Coordinates Orientation of the galactic, ecliptic and equatorial coordinate systems, projected on the celestial sphere, showing the galactic equator (black) …
10Ptolemaic system — Astron. a system elaborated by Ptolemy and subsequently modified by others, according to which the earth was the fixed center of the universe, with the heavenly bodies moving about it. [1765 75] * * * ▪ astronomy mathematical model of the… …
