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Sygyzy

by Nick Greene
for About.com

Definition: Sygyzy: Sygyzy is the alignment of three or more bodies of the solar system along a straight or nearly straight line. A planet is in syzygy with the earth and sun when it is in opposition or conjunction, i.e., when its elongation is 180° or 0°. The moon is in syzygy with the earth and sun when it is new or full.

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