| A | B |
|---|
| crater | a pit shaped like a bowl |
| meteorite | a chunk of rock or metal that has fallen from space |
| atmosphere | the layer of gases surrounding Earth |
| telescope | a device that makes faraway objects look larger |
| gravity | a pull that every object has on every other object |
| star | a ball of hot gases that gives off energy |
| orbit | the path a planet, moon or other object takes around another |
| axis | an imaginary line on which an object rotates |
| revolves | to move in a circle or orbit |
| phases | the changing shapes of the Moon |
| equator | an imaginary line that circles the Earth halfway between two poles |
| seasons | the four parts of the year |
| constellation | a pattern of stars |
| rotation | turning around an axis |
