Abstract: A celestial display comprises a board and a plurality of position indicators arranged thereon, including (i) a star position indicator, (ii) a planet position indicator representing a planet that orbits a star represented by the star position indicator, and (iii) a plurality of orbit position indicators arranged around the planet position indicator that each represent a phase of a moon that orbits the planet. The planet position indicator and the star position indicator are arranged along a bisector line of the board and offset from a rotation axis of the board in opposite directions. Rotational positions of the board are each associated with a respective time of day relative to the planet, and, for each rotational position of the board, each of the plurality of orbit position indicators indicates a respective position of the moon relative to an observer on the planet at the respective time of day.