Terminology
| Term | Explanation |
|---|---|
| day | The time it takes for the Earth to complete its rotation around its axis. |
| year | The time it takes for the Earth to complete its orbit around the Sun. |
| month | The time it takes for the Moon to complete its orbit around the Earth. |
| galaxy | A star system that consists of many stars and the planets and objects that orbit them. |
| moon | A large object that orbits a planet. |