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historical models
| Question | Answer |
|---|---|
| historical model | models of the solar system |
| heliocentric | having or representing the sun as the center, as in the accepted astronomical model of the solar system. |
| geocentric | having or representing the earth as the center, as in former astronomical systems. |
| solar system | the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets. |
| parallax | the effect whereby the position or direction of an object appears to differ when viewed from different positions |