On Jupiter is near ideal as an introduction to the musical worlds of Sun Ra. It has a magical mix of colors from Sun Ra's varied palette. Beneath its compelling surface lie many layers of musical detail, and numerous hints as to where Sun Ra was coming from and where he was heading. It combines real depth with beauty and hits you the first time you hear it. On Jupiter represents Sun Ra's closest encounter with the world of disco. In the late-70s he made other albums which also gesture in this direction – Lanquidity has a jazzrock feel while remaining firmly part of the Ra omniverse, this is true too of Disco 3000 despite its title.
On Jupiter really has only one track which fits the ‘disco' tag – "UFO" – but this piece is such a strong statement that it becomes the center of gravity of the album. This has meant that the other tracks here have been somewhat overlooked. "Seductive Fantasy" is a fine performance, with a rare chance to hear James Jacson's bassoon in both its opening and closing stages. "Seductive Fantasy" has an ensemble theme stated twice during the performance, featuring John Gilmore, who also offers a very fine tenor solo. Before this there is a fine understated solo by a baritone saxophonist, as well as contributions from Marshall Allen on oboe, electric guitars and bass. There is a cameo for Eloe Omoe's bass clarinet, and towards the end of the piece unidentified arco string players make an appearance. There is much excellent Sun Ra piano to be heard throughout the whole of "Seductive Fantasy."
The title track features Allen's oboe and Ra's piano, along with guitars and bass and multi-layered percussion. This is the first appearance on record of this piece, afterwards to remain a frequently performed item. "UFO" bursts into life with the full Arkestra in disco mode, and contains solos from Gilmore, Taylor Richardson and Michael Ray.This is its second known appearance, the only others being from a few concerts, all within a few months of each other in mid 1979. This studio recording was made around May 1979, according to drummer Samarai Celestial, who identifies it as predating his tenure with the Arkestra – he plays on the other two pieces on the album, recorded in October that year.
Sun Ra would reportedly rehearse his band to the point of exhaustion, but in the studio his was usually a one-take approach, close to a concert performance. This did not necessarily mean that every album appeared in the form it was recorded. On Jupiter, like Lanquidity (but unlike Disco 3000, essentially a live recording) owes a lot of its final sound to post-production. The album was mixed by Michael Ray, who layered in prerecorded material with that produced in the studio – Ra sent Ray back to the Arkestra base during the mixing session, and Ray returned with "a handful of tapes." Close listening would suggest that some of the guitar and percussion and possibly some vocals were added in this way.