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16 Cards in this Set
- Front
- Back
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Telescope
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A device people use to observe distant objects with their eyes
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Satellite
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An object that moves around another object in space
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Revolution
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The movement of Earth around the Sun
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Orbit
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The path that an object such as a planet takes as it revolves around another object
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Star
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A huge burning sphere of gases; for example, the Sun
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Gas Giants
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The planets Jupiter, Saturn, Uranus, and Neptune, which are large spheres made up mostly of gases
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Axis
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An imaginary line which runs through both poles of a planet
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Phase
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One of the different shapes the moon seems to have as it orbits around Earth
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Planet
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A large object that moves around a star
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Rotation
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The motion of a planet as it turns on its axis
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Outer Planets
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The planets farthest from the sun; Jupiter, Saturn, Uranus, Neptune and Pluto
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Solar System
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A group of objects in space that move around a central star
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Asteroid
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A small rocky object that moves around the sun
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Comet
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A small mass of dust and ice that orbits the sun in a long, oval shape path
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Inner Planets
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The planets closest to the sun; Mercury, Venus, Earth, and Mars
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Space Probe
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A space vehicle that carries cameras, instruments, and other research tools
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