In this very large game (22.5" x 32.5"), players race to explore the eight other planets within the solar system. One unusual gimmick to this game is its use of a stack of slide transparencies (vs. regular cards) in concert with a board randomizing mechanism. Pulling a lever rotates the obstacles to movement on the board as well as pushes a transparency off the bottom of a stack into position. Movement of the transparency into place causes a small light bulb to turn on, lighting the slide and revealing the instructional text.

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