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The Solar System MS-ESS1-2

NGSS

centripetal force

the force that causes an object to move in a circle
centripetal force Simple Definition

galaxy

a massive system of stars, gases, and dust held together by gravity
galaxy Simple Definition

gravity

the attractive force between all objects that have mass
gravity Simple Definition

mass

the amount of matter in an object
mass Simple Definition

moon

a natural body that revolves around a planet
moon Simple Definition

orbit

the path of one body around another, like Earth’s orbit around the Sun
orbit Simple Definition

rotation

the turning of a planet on its axis
rotation Simple Definition

satellite

an object that moves around a larger object in space, like the moon around Earth
satellite Simple Definition

solar system

a group of planets and other objects that revolve around a sun
solar system Simple Definition

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