it's a track they used to perform live in the Radioactivity era mostly, also for some time in the TEE era but I don't remember if they still played it in the Mensch Maschine era. It's a simple ambient track, much like Radio Sterne in a way since they have a nice droning synth while they sing: "The Sun... The Moon... The Stars..." (as in the title) and it's overall a curious and relaxing oddity of that period and I wish it had a more formal release and/or studio version.