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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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an imaginary line that passes through earth's center and the north and south poles ,about which earth rotates
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rotation
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The spinning motion of a planet about 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 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 of the equator
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solstice
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The two days of the year on which the noon sun is directly overhead at either 23.5 south or 23.5 north .
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equinox
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The two days of the year on which neither hemisphere is tilted toward 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 the earth .
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Eclipse
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an elongated circle or oval shape;the shape of the planets orbit.
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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 the shadow .
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Penumbra
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The part of the shadow surrounding the darkest part
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Lunar eclipse
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The blocking of the sunlight to the moon that occurs when the earth is directly between the sun and the moon.
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Tide
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The daily rise and fall of earth's waters on shore.
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Gravity
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The attractive force between two objects;its magnitude depends on their masses and the distance between them
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satellite
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any object that revolves around another object in space .
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Geosynchonous orbit
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The orbit of 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 by making them appear closer.
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Crater
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A round pit on the moons surface
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Maria
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Dark flat regions on the moon's surface.
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