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syzygy
(redirected from Planetary alignment)

   Also found in: Medical, Wikipedia, Hutchinson 0.04 sec.
syzygy (sĭz`əjē), in astronomy, alignment of three 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 opposition, in astronomy, alignment of two celestial bodies on opposite sides of the sky as viewed from earth. Opposition of the moon or planets is often determined in reference to the sun.
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 or conjunction conjunction, in astronomy, alignment of two celestial bodies as seen from the earth. Conjunction of the moon and the planets is often determined by reference to the sun.
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, i.e., when its elongation elongation, in astronomy, the angular distance between two points in the sky as measured from a third point. The elongation of a planet is usually measured as the angular distance from the sun to the planet as measured from the earth.
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 is 180° or 0°. The moon is in syzygy with the earth and sun when it is new or full.

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A changing of the guard in the mayor's office has escaped neither of the local astrologers, who believe that Kitty Piercy's replacement of Jim Torrey may be a fulfillment of what's been preordained by planetary alignment.
There seems to be some kind of planetary alignment.
August 20 and September 5, 1977 The launches are timed to meet a rare planetary alignment in order to travel the most distance using the least amount of time and energy.
 
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