Throughout history there have been 4 main theories about the Sun and its relationship to the Earth. The following table briefly outlines these theories.
|The Dimension||Pre-Scientific Conception||Geocentric Conception||Heliocentric Conception||Sidereal Conception|
|Space||Infinitely flat||Earth surrounded by sky.||The Sun at the center of a small universe||Our solar system is one of many in a universe.|
|Celestial objects||Sun, moon, and stars||Sun, moon, planets, stars||Sun, moons, planets, stars||Includes multitudes of objects.|
|Equipment available||Eye, feeling||Eye, brain||Eye, brain, optical telescope||Eye, brain, telescope, photometer, spectrometer, and others.|
|Source of order and motion||Will of the gods||Natural motion||Gravitational forces, electricity||Gravitational forces, electricity, and nuclear force|
- Robert Jastrow, 1989
©Copyright 1998 Elizabeth
Beckett, Holly Bernitt, and Vishwa Chandra.