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20 Cards in this Set
- Front
- Back
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Outer planets
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Jupiter, Saturn, Uranus, and Neptune are the outer planets. They are cold and dark because they are far from the Sun.
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Orbit
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To move in a path around an object.
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Gas giant
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A large planet made up mostly of gases.
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Inner planets
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The four closet planets to the Sun (Venus, Mercury, Earth, and Mars). These planets are smaller and are solid.
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Magnify
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To make an object appear larger.
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Outer planets
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The four planets farthest from the Sun (Jupiter, Saturn, Neptune, and Uranus). The planets are gas giants.
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Orbit
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To move in a path around an object.
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Moon
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A small, rounded body in orbit around a planet.
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Planet
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A large body in space that moves around a star.
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Solar System
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The Sun, planets, moons, and other objects that orbit the Sun.
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Space probe
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A craft that helps scientists explore outer space.
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Sun
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The nearest star to the Earth (it is a medium sized star).
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Telescope
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A tool that makes distant objects appear larger, brighter, and sharper.
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Axis
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An imaginary line through the center of an object.
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Constellation
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A group of stars that forms a pattern shaped like an animal, object, or person.
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Equator
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An imaginary line that circles the Earth halfway between the North and South Poles.
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Revolve
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To move in a path around another object.
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Rotate
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To turn on an axis.
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Star
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A ball of hot gases that gives off light or other form of energy.
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Moon
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A small rounded body in orbit around a planet.
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