| A | B |
|---|
| axis | an imaginary line through a spinning object |
| rotation | one full spin of an object around an axis |
| revolution | the movement of one object around another object |
| orbit | the path of an object around another object |
| satellite | an object that revolves around another object |
| solar system | the sun, 8 planets and their moons ,and other objects that orbit the sun |
| gravity | a force that pulls any two objects together |
| moon | the Earth's natural satellite |
| sun | the yellow star in our solar system |
| planet | one of 8 large, solid, nearly spherical objects revolving around the sun |
| crater | a deep impression left in the surface of a planet or man by the impact of meteorite |
| season | one of the four parts of the year |
| lunar | of or pertaining to the moon |
| solar | of or pertaining to the sun |
| phase | on of the apparent shapes of the moon |
