Lunar Orbit Star Chart used in training by the crew of Apollo16. This plastic film chart, entitled “LM Lunar Orbit, Star Chart, April 16, 1972 Launch,” measures 16” x 10”. This chart was used in the Lunar Module Simulator for training. This is an exact duplicate of the Apollo 16 Star Chart used for navigation during all flight phases of the Lunar Module, especially for aborts and rendezvous; the identification of specific stars was of special significance for the Lunar Module during return from the Moon’s surface and rendezvous with the Command Service Module. In particular, on this chart is the presence of three very special stars which are related to the ill-fated crew of Apollo 1. Commander Gus Grissom was involved with the early planning and production of the Apollo Star Charts and when they were deciding on which stars to number and name. He made up names for three of the fainter stars, each related to himself and his fellow Apollo 1 crew-members. Star number 3 was called “Navi,” which is Grissom's middle name 'Ivan' spelled backward. Star number 17 was named “Regor” which is 'Roger' (Chaffee) spelled backward and star number 20 was “Dnoces” which is 'second' (Ed White II) spelled backward. This chart is in very good condition with mild toning and light wear from use.