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Astronomical conjunction

"Conjunction" is a term used in positional astronomy. If a superior planet is on the opposite side of a solar system, from a relatively inferior planet; then, the planets are in a superior conjunction. An inferior conjunction occurs when two planets lie in a line; on the same side of their Sun. When conjunctions occur, the involved planets are close to one another when viewed upon the celestial sphere.

Opposition In an inferior conjunction, the superior planet is "at opposition" to the inferior planet.

Spring 2002

In Spring 2002, a rare grand conjunction occurred; in which Saturn, Jupiter, Mars, Venus and Mercury were all visible simultaneously in the west-northwest sky, shortly after sundown.

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