| A | B |
|---|
| Revolution | When the planets travels around the sun. |
| Elliptical Orbits | Ellipse shaped orbits whit two foci. |
| Heliocentric | Model that has the sun at its center. |
| Geocentric | Model tat has earth at its center. |
| Zenith | Point in the sky directly above the observer. |
| satellites | A smaller object revolving around a larger object. |
| orbit | The path and object takes around a star. |
| perihelion | Is the closest to the sun. |
| aphelion | the farthest away from the sun. |
| Terrestial | Planets made of solid rock. |
| Jovian | Planets made of gas. |
| Rotation | when a planet spins completely on its axis. |
| Auroras | Electrons from the sun's sunspots pulled into the earth atmosphere(northern lights) |
| Comet | Dirty Snowball. |
| Meteor | Meteorid entering the earths atmosphere. |
| Asteroid | large rock sizes of new jersey made up of metal cores orbiting the sun between the planets mars and jupiter. |
| Retrograde motion | When an planet apears to be moving west to east. |
| Celestial sphere | An inmaginary sphere serounding the earth. |
| Celestial Object | Any thing thats outside the celestial sphere. |
