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In terms of complexity, synastry — the examination of the interplay between planets in two different charts — falls somewhere between an advanced placement calculus class and the moon landing.

Synastry analysis includes the composite chart, which takes two charts and smashes them together to create one shared chart that contains within it as many details about a relationship as there are grains of sand on earth.

Synastry, si-nas′tri, n. coincidence as regards stellar influences.

Time — :22.30 :46.21 :58.77 Winner — Ch filly 2008, by Nacheezmo — Lady Ledoux by Synastry Owner — William J. Craig.

“The Mancy of Sound,” Mr. Coleman’s sharp new album with Five Elements, was released in late July; “Synastry,” a chamberlike duo outing by Ms. Shyu and the bassist Mark Dresser, is due out next week; and Mr. Sorey will make his label debut as a bandleader in September, with “Oblique 1,” a state-of-the-art quintet album.