| A | B |
|---|
| Earth-Centered Model | Model where the everything revolves around the Earth |
| Sun-Centered Model | Model where everything revolves around the Sun |
| Nicholas Copernicus | Astronomer who said that the Moon revolved around the Earth and the Earth revolved around the Sun |
| Galileo Galilei | Astronomer who supported Copernicus' Theory when he noticed that Venus went through phases just as the Moon did |
| Cloud of gas, ice, and dust | The components of how our solar system started |
| Inner Planets | Mercury, Venus, Earth, Mars |
| Outer Planets | Jupiter, Saturn, Uranus, Neptune, and Pluto |
| Johannes Kepler | Astronomer who said that the planets followed an ellipitcal pattern |
