| A | B |
|---|
| rotation | the spinning motion around an axis |
| axis | the imaginary line on which an object rotates |
| revolution | the movement of an oject in space in a circle or orbit around another object |
| constellation | a group of stars that forms a pattern that looks like a person, animal, or object |
| planet | a large body that circles a star and does not give off light as a star does |
| solar system | the Sun and all the planets and other objects that orbit it |
| phases | any stage, in a series of changes in the apparent shape of the Moon |
| Mercury | the first planet from the Sun |
| Venus | the second planet from the Sun |
| Earth | the third planet from the Sun |
| Mars | the fourth planet from the Sun |
| Jupiter | the fifth planet from the Sun |
| Saturn | the sixth planet from the Sun |
| Uranus | the seventh planet from the Sun |
| Neptune | the eighth planet from the Sun |
