Formation of the Solar System
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5 terms
Terms | Definitions |
|---|---|
 Planetesimals | objects hundreds of kilometers in diameter. Colliding particles in the early solar system. |
| Retrograde Motion | The apparant backward movement of a planet |
| Ellipse | Oval Shape that is centered on two points instead of a single point as in a circle |
| Astronomical Unit | a Measurement from a planet to the sun |
| Eccentricity | The ratio of the distance between the foci to the length of the major axis |
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