| Question | Answer |
| sun | The star at the center of our solar system. |
| rotate | To spin on an axis |
| axis | An imaginary line that passes through Earth's center and its North and South poles |
| revolve | To travel in a closed path |
| orbit | The path one body takes in space as it revolves around another |
| equator | An imaginary line around Earth equally distant from the North and South Poles |
| moon | Any natural body that revolves around a planet |
| crater | A los, bowl-shaped area on the surface of a planet or moon |
| moon phase | One of the shapes the moon seems to have as it orbits the Earth |
| eclipse | An event that occurs when one object in space passes through the shadow of another object in space |
| refraction | The bending of light as it moves from one material to another |
| star | A huge ball of very hot gases in space |
| solar system | A star and all the planets and other objects that revolve around it |
| constellation | A pattern of stars, named after a sythological or religious figure, an object, or an animal |
| planet | A body that revolves around a star |
| universe | Everything that exists, including such things as stars, planets, gas, dust, and energy |
| galaxy | A grouping of gas, dust, and many stars, plus any objects that orbit those stars |
