Apollo 11 insignia. At Scheer's suggestion, the CM was named "Columbia" after "Columbiad", the giant cannon that launched a spacecraft (also from Florida) in Jules Verne's 1865 novel "From the Earth to the Moon". It also referenced Columbia, a historical name of the United States. The astronaut had personal preference kits (PPKs), small bags containing personal items of significance that they wanted to take with them on the mission. Five PPKs were carried on Apollo 11: three (one for each astronaut) were stowed on "Columbia" before launch, and two on "Eagle". Neil Armstrong's LM PPK contained a piece of wood from the
Journey of Apollo 15 to the Moon the first to enter into a highly inclined orbit. Previous Apollo crews had been in lunar orbits that were just over equatorial regions. The Descent Orbit Insertion (DOI) burn was performed behind the Moon on the second orbit. This burn placed them into a 58.8 by 9.5 nautical mile (108.9 by 17.6 km) orbit, with the low point over Hadley Rille landing site. On Apollo 11 and Apollo 12 this burn was done by the Lunar Module after it had undocked from the Command/Service Module. From Apollo 14 onwards it was done by the CSM as a way of conserving