| Term | Definition |
|---|
| asteroids | rocky metallic objects that orbit the sun but are too small to be considered planets |
| celestial | having to do with the sky |
| object | something you can see or touch |
| comets | balls of ice, rock, and dust in space with a tail |
| galaxy | a cluster of stars, dust and gases held together by gravity |
| planets | large bodies that orbit the sun |
| satellites | any object that revolves around another object in space |
| star | hot, glowing ball of gases |
| distance | the property created by the space between two objects or points |
| force | a push or a pull exerted on an object |
| gravity | the force of attraction between all masses in the universe |
| gravitational | What type of weight is responsible for a person's weight |
| mass | the property of a body that causes it to have weight in a gravitational field |
| scale | the ratio between the size of something and a representation of it |
| Solar system | the sun with the celestial bodies that revolve around it in its gravitational field |
| constellation | a configuration of stars as seen from the earth |
| milky way galaxy | the galaxy we live in |
| speed of light | the speed at which light travels |
| telescope | a magnifier of images of distant objects |
| universe | everything that exists anywhere |
| sun | any star around which a planetary system evolves |
| light year | the distance that light travels in a vacuum in 1 year |
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