| A | B |
|---|
| solar system | the sun and the objects that orbit around it |
| orbit | the path an object takes as it moves around another object in space |
| planet | a large body of rock or gas that orbits the sun |
| asteroid | a chunk of rock that orbits the sun |
| comet | a large ball of ice and dust that orbits the sun |
| 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 |
| revolution | the movement of one object around another object |
| phases | the different shapes the moon seems to have in the sky when observed from Earth |
| lunar eclipse | the hiding of the moon when it passes through the Earth's shadow |
| solar eclipse | the hiding of the sun that occurs when the moon passes between the sun and Earth |
| star | a hot ball of glowing gases, like our sun |
| constellation | a group of stars that form a pattern |
| telescope | an instrument used to see faraway objects |
