Science Marches On: Some of the facts in the book are wrong, but you cant blame Verne for not knowing something that nobody else knew. Around the Moon in particular suffers from this, considering the book is mostly about three people discussing the moon and the space around them. Also, Verne personally knew that the moon couldn't be conquered by a projectile fired from a cannon, but he did it anyway, as rockets at the time were quite weak and not very impressive, to be honest.
Write Who You Know: Michel Ardan is based on a Verne's close friend Gaspard-Félix Tournachon, a famous photographer, journalist and aeronautics enthusiast, better known as Nadar. Gaspard appreciated it.
Ironically, in the sequel Ardan mentions Nadar as a model that the moonmen may have had a copy of.
Toronto-born Dave Foley portrays the Texan Alan Bean.
Winchester native Cary Elwes also plays the Michael Collins using a Washington, D.C. accent.
Keep Circulating the Tapes: The series was unavailable for years on any of HBO's services, likely due to some of the effects aging. For the 50th Anniversary of Apollo 11, the entire series was remastered.
Prop Recycling: A lot of sets and props from Apollo 13 were reused to make this miniseries. Justified as the Apollo missions were obviously all going to use largely the same hardware and facilities. The biggest aversions were the first episode (which covered Mercury and Gemini), and the last three episodes (which covered the J-series missions which used an upgraded lunar module and introduced the lunar rover).
The Other Darrin: Peter Scolari played Pete Conrad early in the series. In the actual Apollo 12 episode, they realized Scolari was too tall,note Pete Conrad is not a tall man, and was the shortest member of that crew so they got Paul McCrane. note imdb, however, lists both Scolari and Mc Crane at 5'7". Conrad was 5'6".