At least three non-edit versions of David Bowie's iconic "Space Oddity" exist.
The first was recorded in February 1969 for Bowie's promotional film Love You Till Tuesday and was not made commercially available until a VHS release in 1984.
On June 20th 1969, after Bowie's split from his original label Deram, who owned the right to the original recording, Bowie recorded the second "hit" version at London's Trident Studios with session musicians Rick Wakeman (later with Yes) on mellotron, Mick Wayne on guitar (Mick's first group was 'The Outsiders', featuring Jimmy Page), bassist Herbie Flowers of T. Rex fame, and Pentangle/Elton John drummer Terry Cox. Different edits of the album version exist in the U.S. and U.K.
Released just days before the Apollo 11 crew launched towards the moon, the song was not played by the BBC until after the crew had safely returned, in possible anticipation of disaster.
"Space Oddity" reached No. 5 in U.K. and flopped in the U.S., never cracking the Hot 100 in 1969.
Upon its re-release as a single in 1973, "Space Oddity" reached No. 15 on the Billboard chart and became Bowie's first hit single in the United States.
A revised, semi-acoustic version of the song was released in 1979 as a B-side to Bowie's cover of The Doors' "Alabama Song".
I've included all three versions for your listening pleasure below. Note the 1979 versions audio has been added to a 1979 US television performance where David mimed the original 1969 single.