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Definition
| The sun and all the planets and objects that move around it |
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| The sun is a star that is close to our planet. |
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| an object in space that produces its own heat and light |
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Definition
| A big ball of ice and snow that is the size of a mountain in outer space that travels around the sun |
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| A large space rock that travels around the sun |
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| the direction that one object in space takes around the other |
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Definition
| The amount of matter in an object. |
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| What all things are made of |
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| A scientist who studies planets, stars and galaxies |
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Definition
| A group of millions of stars |
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| An imaginary straight line around which an object spins |
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| The air that surrounds Earth |
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Definition
| A natural object that orbits a planet |
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Definition
| The force that pulls objects toward each other |
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