| A | B |
|---|
| solar system | collection of the sun and all the objects (i.e. planets, asteroids, comets, and meteors) that move around it |
| planet | a large object that orbits a star |
| asteroid | a large space rock that orbits the sun |
| system | a collection of things, including processes, that have influence on one another and the whole. |
| satellite | an object that orbits a planet |
| Sun | the star that is the central body of our solar system around which Earth (and other planets) orbit |
| gravity | the force that attracts an object toward the center of Earth or toward another object that has mass |
| weight | measure of how strongly gravity pulls on matter; indicates how heavy something is |
| mass | the amount of matter in an object or substance; measured in grams |
| force | a push or pull |
