The hologram is mounted at an angle and illuminated from above by a bright point source. It includes the configuration of the planets on April 26, 1832 and December 31, 1999. Why did they choose these dates?
Laplace, who invented the orrery, had an interesting exchange with Napolean when he presented one of his devices to the emporer. Napolean examined his orrery and stated, "How can this be! You made the system of the world, you explain the laws of all creation, but in all your book you speak not once of the existence of God!" Laplace responded, "[No, Sire,] I had no need of that hypothesis." See Wikiquote for further information and other translations.
The photographs above show the set of three white light holograms on a single stand with close-ups of the two scenes of the orrery hologram as described above.