| A | B |
|---|
| Sun | The star which is in the center of our solar system. |
| Moon | This big rock revolves around the Earth. |
| orbit | The path an object takes as it moves around another object in space. |
| rotation | The spinning of an object on its axis. |
| axis | An imaginary line that goes through the North Pole and the South Pole of Earth. |
| seasons | These are caused by the Earth rotating on a tilted axis. |
| twenty-four hours | The amount of time it takes the Earth to rotate one time. |
| three hundred sixty-five days | The amount of time it takes the Earth to complete one revolution around the Sun. |
| sunspot | An area on the Sun which is cooler than the surrounding areas. |
| prominence | Gas which flares up from the surface of the Sun. |
| revolution | The movement of one object around another object. |
| asteroid | A chunk of rock that orbits the Sun. |
| comet | A large ball of ice and dust that orbits the Sun. |
| Meteorites | Meteors which hit the surface of the Earth. |
