| A | B |
|---|
| rotate | to spin around |
| axis | A real or imaginary line that a spinning object turns around |
| revolve | To move in a circular or almost circular path around something else |
| orbit | The path an object follows as it revolves |
| crater | A hollow area or pit in the ground |
| star | A hot sphere of gases that gives off energy |
| planet | a satellite of the Sun |
| solar system | the sun and all the other objects around it |
| asteroid | chunks of rock and metal that orbit the sun |
| comet | a chunk of ice and rock that orbits the Sun in a long narrow orbit |
| satellite | An object that revolves around another object |
| meteor | A fragment of rock, ice, or metal that burns up in Earth’s atmosphere |
| constellation | a number of stars that appear to form a pattern |
| telescope | An instrument that can make far away objects appear larger. This instrument is used to study objects in space from Earth. |
| astronomer | a scientist who studies space from Earth |
| astronaut | a scientist who studies and travels in space |
| moon | A natural satellite of a planet |
| phases of the moon | How the shape of the Moon seems to change as it revolves around the Earth in 29 ½ days |
