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23 Cards in this Set
- Front
- Back
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ASTRONOMY
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the study of the moon, stars and other objects in space.
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AXIS
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the imaginary line that passes through earths center
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ROTATION
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the spinning motion of the earth on its axis.
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REVOLUTION
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the movement of an object around another object.
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ORBIT
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the path of an object as it revolves around another object in space.
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LATITUDE
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the distance north or south from the equator.
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SOLSTICE
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the 2 days of the year on which the noon sun is directly overhead.
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EQUINOX
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the 2 days of the year on which neither hemisphere is tilted towards or away from the sun
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VERNAL EQUINOX
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the day of the year that marks the beginning of spring in the northern hemisphere.
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AUTUMNAL EQUINOX
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the day of the year that marks the beginning of fall in the northern hemisphere.
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PHASE
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one of the different shapes of the moon as seen from earth.
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ECLIPSE
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a partial or total blocking of one object by another.
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SOLAR ECLIPSE
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the blocking of sunlight to earth that occurs when the moon is between the sun and the earth.
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UMBRA
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the darkest part of a shadow.
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PENUMBRA
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the part of a shadow surrounding the darkest part.
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LUNAR ECLIPSE
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the blocking of sunlight to the moon that occurs when the earth is directly between the sun and moon.
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TIDE
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the daily rise and fall of the earths waters on the shores.
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GRAVITY
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the attractive force between two objects.
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SATELLITE
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an object that revolves around another object.
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GEOSYNCHRONOUS ORBIT
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the orbit of a satellite that revolves around earth at the same rate that earth rotates.
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TELESCOPE
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a device built to study distant objects
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CRATER
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a bowl shaped area that forms around a volcano's central opening.
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MARIA
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dark flat region on the moon's surfsce.
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