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14 Cards in this Set
- Front
- Back
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sun
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the star in the center of our solar system that provides the Earth with light and heat, and is the main source of energy for the Earth.
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earth
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the planet on which we live, and the third planet from the sun.
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moon
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a natural, rocky object that revolves around a planet.
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diameter
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a line from one side of an object, through the center, to the other side.
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solar system
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a star and the space objects that orbit it. (planets, meteors, asteroids)
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satellite
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an object that revolves around a larger object.
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atmosphere
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the layer of air and gases that surround a planet.
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photosphere
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the visible surface of the Sun, or any star.
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corona
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the outermost layer of the Sun's atmosphere, visible only during a solar eclipse.
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solar flare
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a sudden energy outburst on a small area of the Sun's surface.
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sunspot
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a dark spot on the Sun's surface caused by a magnetic storm that cools a large area.
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maria
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large, dark plains on the moon, referred to as "seas" even though there is no water in them.
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revolve
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to move in a circular path around another object.
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rotate
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to spin or turn around a central point.
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