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Solar System

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TermDefinition
asteroid Rocky object that orbits the Sun mostly in an area between Mars and Jupiter.
astronomer Scientist who observes and studies space.
atmosphere All the gases that surround a planet.
axis An imaginary line through the center of an object, around which the object spins or rotates.
crater A bowl-shaped hole made by an object hitting another object.
day The length of time a planet takes to make one complete turn on its axis.
ellipse A shape like an oval.
gas giant A large planet made of gases.
inner planet The four planets closest to the Sun, also called the Rocky Neighbors or terrestrial planets. They include Mercury, Venus, Earth, and Mars.
moon The natural satellite of a planet.
orbit The path an object takes when revolving around another object.
outer planet The four planets that are farther away from the Sun than the inner planets. They are also called the gas giants. They include Jupiter, Saturn, Uranus, and Neptune.
phase The shape of the Moon that appears at a certain time during the Moon's cycle of changes.
planet A large, spherical satellite of a star.
revolution One trip around an orbit.
revolve To move in an orbit around something.
rotate To spin on an axis.
satellite An object that revolves around a larger object.
solar Having to do with the sun.
solar system A star and all the satellites that orbit it.
star An enormous ball of glowing gas that gives of light and heat.
Sun The name for the central star in our solar system.
year The length of time a planet takes to make one complete revolution around the Sun.
Created by: 212390
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