Solar System 25
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32 Terms
force
A push or a pull
gravity
A force of attraction between objects that is due to their masses.
solar system
the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
Earth
Third planet from the sun
Sun
The star at the center of our solar system
Planet order from the sun
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
Moon
A natural satellite that revolves around a planet.
revolution
The movement of an object around another object
rotation
The spinning motion of a planet on its axis
atmosphere
A thin layer of gases surrounding Earth
composition
the makeup of something
solar system
sun, planets, and all the other objects that revolve around the sun
planet
A large body in space that orbits a star and does not produce light of its own
orbit
The path of an object as it revolves around another object in space
gravity
A force of attraction between objects that is due to their masses.
period of revolution
the time it takes an object to travel once around the Sun
period of rotation
the time it takes an object to complete one rotation
astronomical unit
A unit of length used for distances within the solar system
sun
A typical star that is the source of light and heat for the planets in the solar system.
planet
A large body in space that orbits a star and does not produce light of its own
moon
A natural satellite that revolves around a planet.
meteor
A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere.
asteroid
a small rocky body orbiting the sun
comet
A ball of frozen dust and rock that orbits the sun and has a tail that glows
Kuiper belt
A region of the solar system that is just beyond the orbit of Neptune and that contains small bodies made mostly of ice
Oort Cloud
A spherical region of comets that surrounds the solar system
light-year
the distance light travels in one year
Meteoroid
A chunk of rock or dust in space
meteorite
A meteoroid that has hit earth's surface.
Rotation
The spinning of Earth on its axis
distance
How far an object moves
habitable zone
the region around a star in which planets could potentially have surface temperatures at which liquid water could exist
Note 
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