* The explosion that hurled the Moon across space was magnetic, not atomic in nature; perhaps it affected the quantum field and caused the Moon to slip between normal and [[SubspaceOrHyperspace hyperspace]] at random intervals.
* In three episodes of the first season ("Black Sun", "Collision Course" and "The Testament of Arkadia") and possibly a fourth ("War Games"), it's either theorized or shown outright that a "cosmic intelligence" had a hand in the original lunar explosion and the Alphans' later travels.
** Not much wild in that idea. David Hirsch of Starlog Magazine proposed the idea of a Mysterious Unknown Force having a part in the survival of Moonbase Alpha way back in 1980, and the idea has been taken up by many fans.
* The whole "Moon knocked out of orbit" situation is just a very elaborate hoax by the [[Series/MissionImpossible Impossible Mission Force]].