“A Posteriori” (Latin for "after the fact") is a 54-minute continuous-mix space symphony by Enigma, the musical project founded in 1990 by Romanian-German musician and producer Michael Cretu. Enigma exploded onto the music scene with their catchy mix of Gregorian chanting and dance beats. This does not reach the heights of Enigma’s first album, MCMXC a. D., but it is still an atmospheric and melodic journey through the cosmos.

The tracks smoothly blend into each other and the album is best enjoyed as a whole to be fully appreciated. This laid-back space-themed piece of electronica is mostly instrumental with just a few tracks featuring Cretu’s own breathy vocals. It is a typical Cretu blend of Ambient House and New Age with haunting soundscapes of wailing soft pads, distorted guitars, the beckoning “Enigma Voice” and other trademark Enigma sounds recognisable from earlier releases.

The racing house beats of “Eppur Si Muove” (And yet it moves) and “Feel Me Heaven” provide a nice up-tempo start before we slow down and chill out with “Dreaming Of Andromeda” which features an almost operatic choral synth (or is it a filtered and modified voice) taking up the main melody. The body of the album is made up of a sequence of pleasant but unremarkable instrumentals. The sexy Enigma Voice makes an appearance on "Dancing with Mephisto" and can't resist slipping into a bit of French language which is typical of numerous Enigma tracks.

The album switches up a gear at track ten with the New Age anthem “Sitting On The Moon”. Cretu’s haunting, yearning vocals serenade the Earth with a catchy “Where are you? I'm sitting on the moon. Where are you? I am missing you.” hook. By far the best instrumental on the album is the galloping and dramatic “The Alchemist” (a nod to the studio - see below). This has been described as invoking the work of Jean-Michel Jarre which illustrates its quality.

The climax is provided by “Goodbye Milky Way” which is a catchy but tear-inducing epitaph for our galaxy. The Enigma Voice informs us that “In 5 billion years, The Andromeda galaxy will collide with our Milky Way. A new, gigantic, cosmic world, will be born”. This is true, so we are told!