Ephemeris (table of planetary positions) is based on the movement of the planets and the constellations they appear in. Players move pieces representing the Sun, Moon, three Inner and five Outer Planets round a circular board divided up into the Constellations that form the signs of the Zodiac. The players are dealt an open hand of cards representing the Constellations and a hidden hand of Planet cards, the object being to move the Planet pieces round the board to form your configuration. Movement of the pieces is controlled by rules on which pieces can pass each other, with slower moving Planets being unable to pass the faster ones. - BoardGameGeek