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Universe
Earth Space Science
Question | Answer |
---|---|
Universe | Space and all the matter in it |
Light-year | The distance that light travels in one year. |
Solar System | The sun and all of the planets and other systems around it. |
Galaxy | A group of stars and gases. |
Planet | A large sphere that orbits a star. |
Star | A gas that emits light. |
Astronomical-unit | The distance between earth and the sun. |