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pcmsastronomy
Term | Definition |
---|---|
Orbit | the path of an object in space as it moves around another object due to gravity |
solar system | the sun, the planets, and various other objects |
galaxy | millions or billions of starts held together in a group by their own gravity |
universe | space and all the matter and energy in it |
satellite | an object that orbits a more massive object |
space station | a satellite in which people can live and work for long periods of time |
probe | a space craft that is sent into a planet's atmosphere |
gravity | the force that objects exert on each other because of their mass |
Inertia | The resistance of any physical object to any change in it's stat of motion |