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Definition
| the common center of mass around which two or more objects. |
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Term
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Definition
| the slow, conicud motion of the Earth's axis of rotation, caused by the gravitational attraction of the sun and moon, and, to a smaller extent, of the planets, on the equatorial bulge of the earth. |
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Term
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Definition
| the periodic oscillation observed in the precession of the earth's axis and the precession of the equinoxes. |
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Term
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Definition
| the movement or path of the earth or a heavenly body turning on its axis. |
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Term
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Definition
| an increase by natural growth or by gradual external addition; growth in size or extent. |
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