Moon tree Moon tree Moon trees are trees grown from 500 seeds taken into orbit around the Moon by Stuart Roosa during the Apollo 14 mission in 1971. As the Command Module Pilot on the Apollo 14 mission, and as he had been a smoke jumper, Roosa was contacted by Ed Cliff, who was the Chief of the Forest Service at the time, and who proposed the idea of taking the seeds along. Seeds for the experiment were chosen from five different types of trees: loblolly pine, sycamore, sweetgum, redwood, and Douglas fir. The seeds orbited the moon, but were not landed
Apollo PGNCS Apollo PGNCS The Apollo Primary Guidance, Navigation and Control System (PGNCS) (pronounced "pings") was a self-contained inertial guidance system that allowed Apollo spacecraft to carry out their missions when communications with Earth were interrupted, either as expected, when the spacecraft were behind the Moon, or in case of a communications failure. The Apollo Command Module (CM) and Lunar Module (LM), were each equipped with a version of PGNCS. PGNCS, and specifically its computer, were also the command center for all system inputs from the LM, including the Kollsman Instrument built alignment optical telescope, the radar system, the manual translation and