Crash of Moons (1954)

Rocky has to deal with an upcoming collision between the gypsy moon Posita, home to his friend Bovaro, and Ophecius, the location of his archenemy Cleolanta. Cleolanta's reaction is to imprison Rocky while she takes her head man Atlasande to blow up Posita, even though it is still inhabited. Luckily, Rocky is aided by Atlasande's wife Trinka so that the Orbit Jet can run down Cleolanta's spaceship. There is just sufficient time to evacuate Posita's peoples to its twin moon Negato. Secretary Drake arranges for an armada of United World ships to help remove the Ophecians just before the collision occurs.